[apops] FW: Cisco Security Advisory: Cisco IOS Software Data-Link Switch

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  • Subject: [apops] FW: Cisco Security Advisory: Cisco IOS Software Data-Link Switching Vulnerability
  • From: "Network IP Dog" <network.ipdog at gmail dot com>
  • Date: Wed, 28 Sep 2011 11:40:49 -0700
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    • 
      -----Original Message-----
      From: Cisco Systems Product Security Incident Response Team
      [mailto:psirt at cisco dot com] 
      Sent: Wednesday, September 28, 2011 9:00 AM
      To: nanog at nanog dot org
      Cc: psirt at cisco dot com
      Subject: Cisco Security Advisory: Cisco IOS Software Data-Link Switching
      Vulnerability 
      
      -----BEGIN PGP SIGNED MESSAGE-----
      Hash: SHA256
      
      Cisco Security Advisory: Cisco IOS Software Data-Link Switching
      Vulnerability
      
      Advisory ID: cisco-sa-20110928-dlsw
      
      Revision 1.0
      
      For Public Release 2011 September 28 1600 UTC (GMT)
      
      +---------------------------------------------------------------------
      
      Summary
      =======
      
      Cisco IOS Software contains a memory leak vulnerability in the
      Data-Link Switching (DLSw) feature that could result in a device
      reload when processing crafted IP Protocol 91 packets.
      
      Cisco has released free software updates that address this
      vulnerability.
      
      This advisory is posted at
      http://www.cisco.com/warp/public/707/cisco-sa-20110928-dlsw.shtml.
      
      Note: The September 28, 2011, Cisco IOS Software Security Advisory
      bundled publication includes ten Cisco Security Advisories. Nine of the
      advisories address vulnerabilities in Cisco IOS Software, and one
      advisory addresses a vulnerability in Cisco Unified Communications
      Manager. Each advisory lists the Cisco IOS Software releases that
      correct the vulnerability or vulnerabilities detailed in the advisory as
      well as the Cisco IOS Software releases that correct all vulnerabilities
      in the September 2011 Bundled Publication.
      
      Individual publication links are in "Cisco Event Response: Semiannual
      Cisco IOS Software Security Advisory Bundled Publication" at the
      following link:
      
      http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep11.html
      
      Affected Products
      =================
      
      Vulnerable Products
      +------------------
      
      Cisco IOS devices with the DLSw promiscuous feature enabled are affected
      by the vulnerability described in this advisory. Devices with the DLSw
      promiscuous feature enabled contain a line in the configuration defining
      a local DLSw peer with the promiscuous keyword. This configuration
      can be observed by issuing the command "show running-config". Systems
      configured with the DLSw promiscuous feature enabled contain a line
      similar to one of the following:
      
          dlsw local-peer promiscuous
      
      or
      
          dlsw local-peer peer-id <IP address> promiscuous
      
      To determine the software that runs on a Cisco IOS device, log in to
      the device and issue the "show version" command to display the system
      banner. Cisco IOS Software identifies itself as "Cisco Internetwork
      Operating System Software" or "Cisco IOS Software." Other Cisco devices
      do not have the "show version" command or give different output.
      
      The following example shows output from a device running IOS version
      15.0(1)M1:
      
          Router> show version
          Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version
      15.0(1)M1, RELEASE SOFTWARE (fc1)
          Technical Support: http://www.cisco.com/techsupport
          Copyright (c) 1986-2009 by Cisco Systems, Inc.
          Compiled Wed 02-Dec-09 17:17 by prod_rel_team
      
      Additional information about Cisco IOS Software release naming
      conventions is available in the white paper Cisco IOS and NX-OS
      Software Reference Guide at:
      
      http://www.cisco.com/web/about/security/intelligence/ios-ref.html.
      
      Products Confirmed Not Vulnerable
      +--------------------------------
      
      No other Cisco products are currently known to be affected by this
      vulnerability.
      
      Details
      =======
      
      DLSw provides a means of transporting IBM Systems Network
      Architecture (SNA) and network BIOS (NetBIOS) traffic over an IP
      network. The Cisco implementation of DLSw over Fast Sequence
      Transport (FST) uses IP Protocol 91. The promiscuous DLSw feature
      permits the local peer to establish connection with remote peers that
      are not statically configured.
      
      A Cisco IOS device that is configured for DLSw listens for IP
      protocol 91 packets. Depending on the DLSw configuration, UDP port
      2067, and, one or more TCP ports can also be opened. The
      vulnerability described in this document can only be exploited via IP
      Protocol 91 and can not be exploited using either the UDP or TCP
      transports.
      
      Devices with only statically configured DLSw peers are not affected
      by this vulnerability.
      
      This vulnerability is documented in Cisco bug ID CSCth69364 and has been
      assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0945.
      
      Vulnerability Scoring Details
      =============================
      
      Cisco has provided scores for the vulnerability in this advisory
      based on the Common Vulnerability Scoring System (CVSS). The CVSS
      scoring in this Security Advisory is done in accordance with CVSS
      version 2.0.
      
      CVSS is a standards-based scoring method that conveys vulnerability
      severity and helps determine urgency and priority of response.
      
      Cisco has provided a base and temporal score. Customers can then
      compute environmental scores to assist in determining the impact of
      the vulnerability in individual networks.
      
      Cisco has provided an FAQ to answer additional questions regarding
      CVSS at:
      
      http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
      
      Cisco has also provided a CVSS calculator to help compute the
      environmental impact for individual networks at:
      
      http://intellishield.cisco.com/security/alertmanager/cvss
      
      
      * CSCth69364 ("DLSw FST Memory Leak")
      
      CVSS Base Score - 7.8
          Access Vector -            Network
          Access Complexity -        Low
          Authentication -           None
          Confidentiality Impact -   None
          Integrity Impact -         None
          Availability Impact -      Complete
      
      CVSS Temporal Score - 6.4
          Exploitability -           Functional
          Remediation Level -        Official-Fix
          Report Confidence -        Confirmed
      
      
      Impact
      ======
      
      Successful exploitation of the vulnerability may result in a memory
      leak that can lead to a denial of service condition. Memory
      exhaustion can cause an affected Cisco IOS device to reload or become
      unresponsive; a power cycle might be required to recover from the
      condition.
      
      To identify the memory leak caused by this vulnerability, issue the
      "show dlsw peers | include FST.*DISCONN" command; a monotonically
      increasing list of FST peers that remain in the DISCONN state indicates
      that memory is being held, as shown in the following example:
      
          Router> show dlsw peers | include FST.*DISCONN
          FST 176.74.146.194  DISCONN          1         0  prom      0    -   -
      -
          FST 9.180.128.186   DISCONN          1         0  prom      0    -   -
      -
          FST 139.71.105.39   DISCONN          1         0  prom      0    -   -
      -
          FST 138.150.39.18   DISCONN          1         0  prom      0    -   -
      -
          FST 253.240.220.167 DISCONN          1         0  prom      0    -   -
      -
          FST 252.186.119.224 DISCONN          1         0  prom      0    -   -
      -
          FST 41.255.172.252  DISCONN          1         0  prom      0    -   -
      -
          ! --- Output truncated
          Router>
      
      Software Versions and Fixes
      ===========================
      
      When considering software upgrades, also consult
      http://www.cisco.com/go/psirt and any subsequent advisories to determine
      exposure and a complete upgrade solution.
      
      In all cases, customers should exercise caution to be certain the
      devices to be upgraded contain sufficient memory and that current
      hardware and software configurations will continue to be supported
      properly by the new release. If the information is not clear, contact
      the Cisco Technical Assistance Center (TAC) or your contracted
      maintenance provider for assistance.
      
      Additionally, the Cisco IOS Software Checker is available on
      the Cisco Security Intelligence Operations (SIO) portal at
      http://tools.cisco.com/security/center/selectIOSVersion.x. It provides
      several features for checking which Security Advisories affect specified
      versions of Cisco IOS Software.
      
      Cisco IOS Software
      +-----------------
      
      Each row of the following Cisco IOS Software table corresponds to a
      Cisco IOS Software train. If a particular train is vulnerable, the
      earliest releases that contain the fix are listed in the First Fixed
      Release For This Advisory column. The First Fixed Release for All
      Advisories in the September 2011 Bundled Publication column lists the
      earliest possible releases that correct all the published
      vulnerabilities in the Cisco IOS Software Security Advisory bundled
      publication. Cisco recommends upgrading to the latest available
      release, where possible.
      
      +------------------------------------------------------------+
      |   Major    |         Availability of Repaired Releases     |
      |  Release   |                                               |
      |------------+-----------------------------------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 12.0-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------------------------------------------------------|
      | There are no affected 12.0-based releases                  |
      |------------------------------------------------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 12.1-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.1E      | fixed in Release      | fixed in Release      |
      |            | 12.2SXF               | 12.2SXF               |
      |------------+-----------------------+-----------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 12.2-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------+-----------------------+-----------------------|
      | 12.2       | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     |                       |
      |            | fixed in Release 12.4 |                       |
      | 12.2B      |                       | Vulnerable; first     |
      |            | Releases up to and    | fixed in Release 12.4 |
      |            | including 12.2(2)B7   |                       |
      |            | are not vulnerable.   |                       |
      |------------+-----------------------+-----------------------|
      | 12.2BC     | Not vulnerable        | Vulnerable; first     |
      |            |                       | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.2BW     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     |                       |
      |            | fixed in Release      |                       |
      |            | 12.2SB                | Vulnerable; first     |
      | 12.2BX     |                       | fixed in Release      |
      |            | Releases up to and    | 12.2SB                |
      |            | including 12.2(15)BX  |                       |
      |            | are not vulnerable.   |                       |
      |------------+-----------------------+-----------------------|
      | 12.2BY     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2BZ     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2CX     | Not vulnerable        | Vulnerable; first     |
      |            |                       | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.2CY     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2CZ     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SB                |
      |------------+-----------------------+-----------------------|
      | 12.2DA     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2DD     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2DX     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2EU     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            |                       | Releases up to and    |
      | 12.2EW     | Not vulnerable        | including 12.2(20)EW4 |
      |            |                       | are not vulnerable.   |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2EWA    | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2EX     | Not vulnerable        | 12.2(55)EX3           |
      |------------+-----------------------+-----------------------|
      | 12.2EY     | Not vulnerable        | 12.2(58)EY            |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; migrate   |
      | 12.2EZ     | Not vulnerable        | to any release in     |
      |            |                       | 15.0SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2FX     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2FY     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2EX                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2FZ     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; migrate   | Vulnerable; migrate   |
      | 12.2IRA    | to any release in     | to any release in     |
      |            | 12.2IRG               | 12.2IRG               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; migrate   | Vulnerable; migrate   |
      | 12.2IRB    | to any release in     | to any release in     |
      |            | 12.2IRG               | 12.2IRG               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; migrate   | Vulnerable; migrate   |
      | 12.2IRC    | to any release in     | to any release in     |
      |            | 12.2IRG               | 12.2IRG               |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2IRD    | 12.2(33)IRD1          | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2IRE    | 12.2(33)IRE3          | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; migrate   | Vulnerable; migrate   |
      | 12.2IRF    | to any release in     | to any release in     |
      |            | 12.2IRG               | 12.2IRG               |
      |------------+-----------------------+-----------------------|
      | 12.2IRG    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXA    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXB    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXC    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXD    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXE    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXF    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXG    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2IXH    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2JA     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2JK     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2MB     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2MC     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2MRA    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SRD               |
      |------------+-----------------------+-----------------------|
      | 12.2MRB    | Not vulnerable        | 12.2(33)MRB5          |
      |------------+-----------------------+-----------------------|
      |            | Releases prior to     | Releases prior to     |
      |            | 12.2(30)S are         | 12.2(30)S are         |
      |            | vulnerable; Releases  | vulnerable; Releases  |
      | 12.2S      | 12.2(30)S and later   | 12.2(30)S and later   |
      |            | are not vulnerable.   | are not vulnerable.   |
      |            | First fixed in        | First fixed in        |
      |            | Release 12.2SB        | Release 12.2SB        |
      |------------+-----------------------+-----------------------|
      |            | 12.2(31)SB20          | 12.2(31)SB2012.2(33)  |
      | 12.2SB     |                       | SB10                  |
      |            | 12.2(33)SB10          |                       |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SBC    | fixed in Release      | fixed in Release      |
      |            | 12.2SB                | 12.2SB                |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SCA    | fixed in Release      | fixed in Release      |
      |            | 12.2SCC               | 12.2SCC               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SCB    | fixed in Release      | fixed in Release      |
      |            | 12.2SCC               | 12.2SCC               |
      |------------+-----------------------+-----------------------|
      | 12.2SCC    | 12.2(33)SCC7          | 12.2(33)SCC7          |
      |------------+-----------------------+-----------------------|
      |            | 12.2(33)SCD6          |                       |
      | 12.2SCD    |                       | 12.2(33)SCD6          |
      |            | 12.2(33)SCD7          |                       |
      |------------+-----------------------+-----------------------|
      |            | 12.2(33)SCE1          | 12.2(33)SCE112.2(33)  |
      | 12.2SCE    |                       | SCE2                  |
      |            | 12.2(33)SCE2          |                       |
      |------------+-----------------------+-----------------------|
      | 12.2SCF    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2SE     | Not vulnerable        | 12.2(55)SE312.2(58)SE |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2SEA    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2SEB    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2SEC    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2SED    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2SEE    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.2SEF    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SE                |
      |------------+-----------------------+-----------------------|
      |            |                       | Releases prior to     |
      |            |                       | 12.2(25)SEG4 are      |
      |            |                       | vulnerable; Releases  |
      | 12.2SEG    | Not vulnerable        | 12.2(25)SEG4 and      |
      |            |                       | later are not         |
      |            |                       | vulnerable. First     |
      |            |                       | fixed in Release      |
      |            |                       | 12.2EX                |
      |------------+-----------------------+-----------------------|
      |            | Releases prior to     | Releases prior to     |
      |            | 12.2(40)SG are        | 12.2(53)SG4 are       |
      | 12.2SG     | vulnerable; Releases  | vulnerable; Releases  |
      |            | 12.2(40)SG and later  | 12.2(53)SG4 and later |
      |            | are not vulnerable.   | are not vulnerable.   |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2SGA    | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2SL     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2SM     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2SO     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2SQ     | Not vulnerable        | 12.2(50)SQ3           |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SRA    | fixed in Release      | fixed in Release      |
      |            | 12.2SRD               | 12.2SRD               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SRB    | fixed in Release      | fixed in Release      |
      |            | 12.2SRD               | 12.2SRD               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SRC    | fixed in Release      | fixed in Release      |
      |            | 12.2SRD               | 12.2SRD               |
      |------------+-----------------------+-----------------------|
      | 12.2SRD    | 12.2(33)SRD6          | 12.2(33)SRD6          |
      |------------+-----------------------+-----------------------|
      | 12.2SRE    | 12.2(33)SRE3          | 12.2(33)SRE4          |
      |------------+-----------------------+-----------------------|
      | 12.2STE    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2SU     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Releases prior to     | Releases prior to     |
      |            | 12.2(29a)SV are       | 12.2(29a)SV are       |
      |            | vulnerable; Releases  | vulnerable; Releases  |
      | 12.2SV     | 12.2(29a)SV and later | 12.2(29a)SV and later |
      |            | are not vulnerable.   | are not vulnerable.   |
      |            | Migrate to any        | Migrate to any        |
      |            | release in 12.2SVD    | release in 12.2SVD    |
      |------------+-----------------------+-----------------------|
      | 12.2SVA    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2SVC    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2SVD    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2SVE    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Releases prior to     | Vulnerable; contact   |
      |            | 12.2(25)SW12 are      | your support          |
      |            | vulnerable; Releases  | organization per the  |
      | 12.2SW     | 12.2(25)SW12 and      | instructions in the   |
      |            | later are not         | Obtaining Fixed       |
      |            | vulnerable.           | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SX     | fixed in Release      | fixed in Release      |
      |            | 12.2SXF               | 12.2SXF               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SXA    | fixed in Release      | fixed in Release      |
      |            | 12.2SXF               | 12.2SXF               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SXB    | fixed in Release      | fixed in Release      |
      |            | 12.2SXF               | 12.2SXF               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SXD    | fixed in Release      | fixed in Release      |
      |            | 12.2SXF               | 12.2SXF               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SXE    | fixed in Release      | fixed in Release      |
      |            | 12.2SXF               | 12.2SXF               |
      |------------+-----------------------+-----------------------|
      | 12.2SXF    | 12.2(18)SXF17b        | 12.2(18)SXF17b        |
      |------------+-----------------------+-----------------------|
      | 12.2SXH    | 12.2(33)SXH8a         | 12.2(33)SXH8a         |
      |------------+-----------------------+-----------------------|
      | 12.2SXI    | 12.2(33)SXI6          | 12.2(33)SXI6          |
      |------------+-----------------------+-----------------------|
      | 12.2SXJ    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2SY     | 12.2(50)SY            | 12.2(50)SY            |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2SZ     | fixed in Release      | fixed in Release      |
      |            | 12.2SB                | 12.2SB                |
      |------------+-----------------------+-----------------------|
      | 12.2T      | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2TPC    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2XA     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XB     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.2XC     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XD     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XE     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XF     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XG     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XH     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XI     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XJ     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XK     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XL     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XM     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XN     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Please see Cisco      | Please see Cisco      |
      | 12.2XNA    | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            | Please see Cisco      | Please see Cisco      |
      | 12.2XNB    | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            | Please see Cisco      | Please see Cisco      |
      | 12.2XNC    | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            | Please see Cisco      | Please see Cisco      |
      | 12.2XND    | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            | Please see Cisco      | Please see Cisco      |
      | 12.2XNE    | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            | Please see Cisco      | Please see Cisco      |
      | 12.2XNF    | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            |                       | Releases prior to     |
      |            |                       | 12.2(54)XO are        |
      | 12.2XO     | Not vulnerable        | vulnerable; Releases  |
      |            |                       | 12.2(54)XO and later  |
      |            |                       | are not vulnerable.   |
      |------------+-----------------------+-----------------------|
      | 12.2XQ     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XR     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XS     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XT     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XU     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XV     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2XW     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Releases prior to     |                       |
      |            | 12.2(4)YA8 are        |                       |
      |            | vulnerable; Releases  | Vulnerable; first     |
      | 12.2YA     | 12.2(4)YA8 and later  | fixed in Release 12.4 |
      |            | are not vulnerable.   |                       |
      |            | First fixed in        |                       |
      |            | Release 12.4          |                       |
      |------------+-----------------------+-----------------------|
      | 12.2YB     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2YC     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2YD     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2YE     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YF     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2YG     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YH     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            | Releases prior to     | your support          |
      |            | 12.2(8)YJ1 are        | organization per the  |
      | 12.2YJ     | vulnerable; Releases  | instructions in the   |
      |            | 12.2(8)YJ1 and later  | Obtaining Fixed       |
      |            | are not vulnerable.   | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2YK     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YL     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2YM     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YN     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2YO     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2YP     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2YQ     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.2YR     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YS     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YT     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YU     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            | Releases prior to     | your support          |
      |            | 12.2(11)YV1 are       | organization per the  |
      | 12.2YV     | vulnerable; Releases  | instructions in the   |
      |            | 12.2(11)YV1 and later | Obtaining Fixed       |
      |            | are not vulnerable.   | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YW     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YX     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YY     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2YZ     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2ZA     | fixed in Release      | fixed in Release      |
      |            | 12.2SXF               | 12.2SXF               |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2ZB     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2ZC     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2ZD     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.2ZE     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.2ZF     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.2ZG     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Releases prior to     |                       |
      |            | 12.2(13)ZH6 are       |                       |
      |            | vulnerable; Releases  | Vulnerable; first     |
      | 12.2ZH     | 12.2(13)ZH6 and later | fixed in Release 12.4 |
      |            | are not vulnerable.   |                       |
      |            | First fixed in        |                       |
      |            | Release 12.4          |                       |
      |------------+-----------------------+-----------------------|
      | 12.2ZJ     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2ZL     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.2ZP     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.2ZU     | fixed in Release      | fixed in Release      |
      |            | 12.2SXH               | 12.2SXH               |
      |------------+-----------------------+-----------------------|
      | 12.2ZX     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2ZY     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.2ZYA    | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 12.3-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------+-----------------------+-----------------------|
      | 12.3       | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3B      | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.3BC     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.2SCC               |
      |------------+-----------------------+-----------------------|
      | 12.3BW     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3JA     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3JEA    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3JEB    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3JEC    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3JED    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Releases up to and    | Releases up to and    |
      |            | including 12.3(2)JK3  | including 12.3(2)JK3  |
      |            | are not vulnerable.   | are not vulnerable.   |
      | 12.3JK     | Releases 12.3(8)JK1   | Releases 12.3(8)JK1   |
      |            | and later are not     | and later are not     |
      |            | vulnerable. First     | vulnerable. First     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3JL     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3JX     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3T      | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            | Releases up to and    | your support          |
      |            | including 12.3(4)     | organization per the  |
      | 12.3TPC    | TPC11a are not        | instructions in the   |
      |            | vulnerable.           | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.3VA     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Releases prior to     |                       |
      |            | 12.3(2)XA7 are        |                       |
      |            | vulnerable; Releases  | Vulnerable; first     |
      | 12.3XA     | 12.3(2)XA7 and later  | fixed in Release 12.4 |
      |            | are not vulnerable.   |                       |
      |            | First fixed in        |                       |
      |            | Release 12.4          |                       |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.3XB     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.3XC     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3XD     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3XE     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.3XF     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.3XG     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3XI     | fixed in Release      | fixed in Release      |
      |            | 12.2SB                | 12.2SB                |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.3XJ     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.3XK     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3XL     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      | 12.3XQ     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3XR     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3XS     | Not vulnerable        | Vulnerable; first     |
      |            |                       | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3XU     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.3XW     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 12.3XX     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3XY     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3XZ     | Vulnerable; first     | Vulnerable; first     |
      |            | fixed in Release 12.4 | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3YA     | Not vulnerable        | Vulnerable; first     |
      |            |                       | fixed in Release 12.4 |
      |------------+-----------------------+-----------------------|
      | 12.3YD     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3YF     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3YG     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3YH     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3YI     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3YJ     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      | 12.3YK     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.3YM     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3YQ     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     |                       |
      |            | fixed in Release      |                       |
      |            | 12.4T                 | Vulnerable; first     |
      | 12.3YS     |                       | fixed in Release      |
      |            | Releases up to and    | 12.4T                 |
      |            | including 12.3(11)YS1 |                       |
      |            | are not vulnerable.   |                       |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3YT     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3YU     | fixed in Release      | fixed in Release      |
      |            | 12.4XB                | 12.4XB                |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; migrate   | Vulnerable; first     |
      | 12.3YX     | to any release in     | fixed in Release      |
      |            | 12.4XR                | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.3YZ     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.3ZA     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 12.4-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------+-----------------------+-----------------------|
      | 12.4       | 12.4(25e)             | 12.4(25f)             |
      |------------+-----------------------+-----------------------|
      | 12.4GC     | 12.4(24)GC4           | 12.4(24)GC4           |
      |------------+-----------------------+-----------------------|
      | 12.4JA     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JAX    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JDA    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JDC    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JHA    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JHB    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JHC    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JK     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JL     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JMA    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4JMB    | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; migrate   |
      |            |                       | to any release in     |
      |            |                       | 12.4JA                |
      | 12.4JX     | Not vulnerable        |                       |
      |            |                       | Releases up to and    |
      |            |                       | including 12.4(21a)JX |
      |            |                       | are not vulnerable.   |
      |------------+-----------------------+-----------------------|
      | 12.4JY     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4MD     | Not vulnerable        | 12.4(24)MD6 on        |
      |            |                       | 28-Oct-2011           |
      |------------+-----------------------+-----------------------|
      | 12.4MDA    | Not vulnerable        | 12.4(24)MDA7          |
      |------------+-----------------------+-----------------------|
      | 12.4MDB    | Not vulnerable        | 12.4(24)MDB3          |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.4MR     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.4MRA    | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.4MRB    | Not vulnerable        | fixed in Release      |
      |            |                       | 12.4T                 |
      |------------+-----------------------+-----------------------|
      | 12.4SW     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | 12.4(15)T15           | 12.4(15)T16           |
      | 12.4T      |                       |                       |
      |            | 12.4(24)T5            | 12.4(24)T6            |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4XA     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      | 12.4XB     | 12.4(2)XB12           | 12.4(2)XB12           |
      |------------+-----------------------+-----------------------|
      | 12.4XC     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4XD     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      | 12.4XE     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.4XF     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4XG     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      | 12.4XJ     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      | 12.4XK     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.4XL     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Releases up to and    |                       |
      |            | including 12.4(15)XM  |                       |
      |            | are not vulnerable.   |                       |
      |            |                       | Vulnerable; first     |
      | 12.4XM     | Releases 12.4(15)XM3  | fixed in Release      |
      |            | and later are not     | 12.4T                 |
      |            | vulnerable. First     |                       |
      |            | fixed in Release      |                       |
      |            | 12.4T                 |                       |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.4XN     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.4XP     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.4XQ     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 12.4XR     | Not vulnerable        | fixed in Release      |
      |            |                       | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4XT     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      | 12.4XV     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4XW     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4XY     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4XZ     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 12.4YA     | fixed in Release      | fixed in Release      |
      |            | 12.4T                 | 12.4T                 |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; contact   | Vulnerable; contact   |
      |            | your support          | your support          |
      |            | organization per the  | organization per the  |
      | 12.4YB     | instructions in the   | instructions in the   |
      |            | Obtaining Fixed       | Obtaining Fixed       |
      |            | Software section of   | Software section of   |
      |            | this advisory.        | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.4YD     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; fixed in  |
      |            |                       | 12.4(22)YE6 on        |
      | 12.4YE     | Not vulnerable        | 30-Sept-2011; 12.4    |
      |            |                       | (24)YE7 available on  |
      |            |                       | 17-Oct-2011           |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 12.4YG     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 15.0-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------+-----------------------+-----------------------|
      |            | 15.0(1)M4             |                       |
      | 15.0M      |                       | 15.0(1)M7             |
      |            | 15.0(1)M5a            |                       |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 15.0MR     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 15.0MRA    | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | 15.0(1)S3a            |                       |
      |            |                       | 15.0(1)S4             |
      |            | 15.0(1)S4             |                       |
      | 15.0S      |                       | Cisco IOS XE devices: |
      |            | Cisco IOS XE devices: | Please see Cisco      |
      |            | Please see Cisco      | IOS-XE Software       |
      |            | IOS-XE Software       | Availability          |
      |            | Availability          |                       |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 15.0SA     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      | 15.0SE     | Not vulnerable        | Not vulnerable        |
      |------------+-----------------------+-----------------------|
      |            | Cisco IOS XE devices: | Cisco IOS XE devices: |
      | 15.0SG     | Please see Cisco      | Please see Cisco      |
      |            | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 15.0XA     | fixed in Release      | fixed in Release      |
      |            | 15.1T                 | 15.1T                 |
      |------------+-----------------------+-----------------------|
      |            | Cisco IOS XE devices: | Cisco IOS XE devices: |
      | 15.0XO     | Please see Cisco      | Please see Cisco      |
      |            | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 15.1-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 15.1EY     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; first     |
      | 15.1GC     | Not vulnerable        | fixed in Release      |
      |            |                       | 15.1T                 |
      |------------+-----------------------+-----------------------|
      | 15.1M      | Not vulnerable        | 15.1(4)M2; Available  |
      |            |                       | on 30-SEP-11          |
      |------------+-----------------------+-----------------------|
      |            |                       | Vulnerable; contact   |
      |            |                       | your support          |
      |            |                       | organization per the  |
      | 15.1MR     | Not vulnerable        | instructions in the   |
      |            |                       | Obtaining Fixed       |
      |            |                       | Software section of   |
      |            |                       | this advisory.        |
      |------------+-----------------------+-----------------------|
      |            | 15.1(1)S1             | 15.1(2)S2             |
      |            |                       |                       |
      |            | 15.1(2)S              | 15.1(3)S              |
      | 15.1S      |                       |                       |
      |            | Cisco IOS XE devices: | Cisco IOS XE devices: |
      |            | Please see Cisco      | Please see Cisco      |
      |            | IOS-XE Software       | IOS-XE Software       |
      |            | Availability          | Availability          |
      |------------+-----------------------+-----------------------|
      |            | 15.1(1)T3             |                       |
      |            |                       |                       |
      |            | 15.1(2)T2             | 15.1(2)T4 15.1(1)T4   |
      | 15.1T      |                       | on 8-Dec-2011         |
      |            | 15.1(2)T2a            |                       |
      |            |                       |                       |
      |            | 15.1(3)T              |                       |
      |------------+-----------------------+-----------------------|
      |            | Vulnerable; first     | Vulnerable; first     |
      | 15.1XB     | fixed in Release      | fixed in Release      |
      |            | 15.1T                 | 15.1T                 |
      |------------+-----------------------+-----------------------|
      |  Affected  |                       |  First Fixed Release  |
      | 15.2-Based |  First Fixed Release  | for All Advisories in |
      |  Releases  |                       |  the September 2011   |
      |            |                       |  Bundled Publication  |
      |------------------------------------------------------------|
      | There are no affected 15.2-based releases                  |
      +------------------------------------------------------------+
      
      Cisco IOS XE Software
      +--------------------
      
      Cisco IOS XE Software is affected by the vulnerability disclosed in
      this document.
      
      +------------------------------------------------------------+
      |  Cisco   |   First    |    First Fixed Release for All     |
      |  IOS XE  |   Fixed    |  Advisories in the September 2011  |
      | Release  |  Release   |        Bundled Publication         |
      |----------+------------+------------------------------------|
      | 2.1.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
      |          | vulnerable | later                              |
      |----------+------------+------------------------------------|
      | 2.2.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
      |          | vulnerable | later                              |
      |----------+------------+------------------------------------|
      | 2.3.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
      |          | vulnerable | later                              |
      |----------+------------+------------------------------------|
      | 2.4.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
      |          | vulnerable | later                              |
      |----------+------------+------------------------------------|
      | 2.5.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
      |          | vulnerable | later                              |
      |----------+------------+------------------------------------|
      | 2.6.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
      |          | vulnerable | later                              |
      |----------+------------+------------------------------------|
      | 3.1.xS   | 3.1.3S     | Vulnerable; migrate to 3.3.2S or   |
      |          |            | later                              |
      |----------+------------+------------------------------------|
      | 3.1.xSG  | Not        | Vulnerable; migrate to 3.2.0SG or  |
      |          | vulnerable | later                              |
      |----------+------------+------------------------------------|
      | 3.2.xS   | 3.2.1S     | Vulnerable; migrate to 3.3.2S or   |
      |          |            | later                              |
      |----------+------------+------------------------------------|
      | 3.2.xSG  | Not        | Not vulnerable                     |
      |          | vulnerable |                                    |
      |----------+------------+------------------------------------|
      | 3.3.xS   | Not        | 3.3.2S                             |
      |          | vulnerable |                                    |
      |----------+------------+------------------------------------|
      | 3.4.xS   | Not        | Not vulnerable                     |
      |          | vulnerable |                                    |
      +------------------------------------------------------------+
      
      For mapping of Cisco IOS XE to Cisco IOS releases, please refer to
      the Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S Release Notes, and
      Cisco IOS XE 3SG Release Notes.
      
      Cisco IOS XR Software
      +--------------------
      
      Cisco IOS XR Software is not affected by any of the vulnerabilities
      in the September 2011 bundled publication.
      
      Workarounds
      ===========
      
      This vulnerability can be mitigated by using Control Plane Policing
      (CoPP) to only allow IP Protocol 91 packets sent by valid peers.
      
      Mitigation techniques that can be deployed on Cisco devices within
      the network are available in the Cisco Applied Mitigation Bulletin
      companion document for this advisory:
      
      http://www.cisco.com/warp/public/707/cisco-amb-20110928-dlsw.shtml
      
      Control Plane Policing
      +---------------------
      
      Control Plane Policing (CoPP) can be used to block untrusted IP
      Protocol 91 packets sent to the affected device. Cisco IOS Software
      Releases 12.0S, 12.2SX, 12.2S, 12.3T, 12.4, and 12.4T support the
      CoPP feature. CoPP may be configured on a device to protect the
      management and control planes to minimize the risk and effectiveness
      of direct infrastructure attacks by explicitly permitting, and if
      configured, rate-limiting only authorized traffic that is sent to
      infrastructure devices in accordance with existing security policies
      and configurations. The following example, which uses 192.168.100.1
      to represent a trusted host, can be adapted to your network.
      
          !-- Deny FST traffic on IP protocol 91 from trusted
          !-- hosts to all IP addresses configured on all interfaces of the
      affected device
          !-- so that it will be allowed by the CoPP feature
      
          access-list 111 deny 91 host 192.168.100.1 any
      
          !-- Permit all other FST traffic on IP protocol 91
          !-- sent to all IP addresses configured on all interfaces of the
      affected
          !-- device so that it will be policed and dropped by the CoPP feature
      
          access-list 111 permit 91 any any
      
          !-- Permit (Police or Drop)/Deny (Allow) all other Layer3
          !-- and Layer4 traffic in accordance with existing security
          !-- policies and configurations for traffic that is authorized
          !-- to be sent to infrastructure devices
      
          !-- Create a Class-Map for traffic to be policed by
          !-- the CoPP feature
      
          class-map match-all drop-fst-91-class
            match access-group 111
      
          !-- Create a Policy-Map that will be applied to the
          !-- Control-Plane of the device.
      
          policy-map input-CoPP-policy
            class drop-fst-91-class
              drop
      
      
          !-- Apply the Policy-Map to the Control-Plane of the
          !-- device
      
          control-plane
            service-policy input input-CoPP-policy
      
      
      In the above CoPP example, the access control list entries (ACEs)
      that match the potential exploit packets with the "permit" action
      result in these packets being discarded by the policy map "drop"
      function, while packets that match the deny action (not shown) are
      not affected by the policy-map drop function. Note that in the 12.2S
      and 12.0S Cisco IOS trains the policy-map syntax is different, as
      shown in the following example:
      
          policy-map input-CoPP-policy
            class drop-fst-91-class
              police 32000 1500 1500 conform-action drop exceed-action drop
      
      Additional information on the CoPP feature is available at: Control
      Plane Policing Implementation Best Practices.
      
      Obtaining Fixed Software
      ========================
      
      Cisco has released free software updates that address these
      vulnerabilities. Prior to deploying software, customers should
      consult their maintenance provider or check the software for feature
      set compatibility and known issues specific to their environment.
      
      Customers may only install and expect support for the feature
      sets they have purchased. By installing, downloading, accessing
      or otherwise using such software upgrades, customers agree to be
      bound by the terms of Cisco's software license terms found at
      http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html,
      or as otherwise set forth at Cisco.com Downloads at
      http://www.cisco.com/public/sw-center/sw-usingswc.shtml.
      
      Do not contact psirt at cisco dot com or security-alert at cisco dot com for
      software upgrades.
      
      Customers with Service Contracts
      +-------------------------------
      
      Customers with contracts should obtain upgraded software through
      their regular update channels. For most customers, this means that
      upgrades should be obtained through the Software Center on Cisco's
      worldwide website at http://www.cisco.com.
      
      Customers using Third Party Support Organizations
      +------------------------------------------------
      
      Customers whose Cisco products are provided or maintained through
      prior or existing agreements with third-party support organizations,
      such as Cisco Partners, authorized resellers, or service providers
      should contact that support organization for guidance and assistance
      with the appropriate course of action in regards to this advisory.
      
      The effectiveness of any workaround or fix is dependent on specific
      customer situations, such as product mix, network topology, traffic
      behavior, and organizational mission. Due to the variety of affected
      products and releases, customers should consult with their service
      provider or support organization to ensure any applied workaround or
      fix is the most appropriate for use in the intended network before it
      is deployed.
      
      Customers without Service Contracts
      +----------------------------------
      
      Customers who purchase direct from Cisco but do not hold a Cisco
      service contract, and customers who purchase through third-party
      vendors but are unsuccessful in obtaining fixed software through
      their point of sale should acquire upgrades by contacting the Cisco
      Technical Assistance Center (TAC). TAC contacts are as follows.
      
        * +1 800 553 2447 (toll free from within North America)
        * +1 408 526 7209 (toll call from anywhere in the world)
        * e-mail: tac at cisco dot com
      
      Customers should have their product serial number available and be
      prepared to give the URL of this notice as evidence of entitlement to
      a free upgrade. Free upgrades for non-contract customers must be
      requested through the TAC.
      
      Refer to
      http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
      for additional TAC contact information, including localized telephone
      numbers, and instructions and e-mail addresses for use in various
      languages.
      
      Exploitation and Public Announcements
      =====================================
      
      The Cisco PSIRT is not aware of any public announcements or malicious
      use of the vulnerability described in this advisory.
      
      This vulnerability was discovered during Cisco internal testing.
      
      Status of this Notice: FINAL
      ============================
      
      THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
      KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
      MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
      INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
      AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
      DOCUMENT AT ANY TIME.
      
      A stand-alone copy or Paraphrase of the text of this document that
      omits the distribution URL in the following section is an
      uncontrolled copy, and may lack important information or contain
      factual errors.
      
      Distribution
      ============
      
      This advisory is posted on Cisco's worldwide website at:
      
      http://www.cisco.com/warp/public/707/cisco-sa-20110323-dlsw.shtml
      
      In addition to worldwide web posting, a text version of this notice
      is clear-signed with the Cisco PSIRT PGP key and is posted to the
      following e-mail and Usenet news recipients.
      
        * cust-security-announce at cisco dot com
        * first-bulletins at lists dot first dot org
        * bugtraq at securityfocus dot com
        * vulnwatch at vulnwatch dot org
        * cisco at spot dot colorado dot edu
        * cisco-nsp at puck dot nether dot net
        * full-disclosure at lists.grok dot org dot uk
        * comp.dcom.sys.cisco at newsgate dot cisco dot com
      
      Future updates of this advisory, if any, will be placed on Cisco's
      worldwide website, but may or may not be actively announced on
      mailing lists or newsgroups. Users concerned about this problem are
      encouraged to check the above URL for any updates.
      
      Revision History
      ================
      
      +------------------------------------------------------------+
      | Revision 1.0 | 2011-September-28 | Initial public release  |
      +------------------------------------------------------------+
      
      Cisco Security Procedures
      =========================
      
      Complete information on reporting security vulnerabilities
      in Cisco products, obtaining assistance with security
      incidents, and registering to receive security information
      from Cisco, is available on Cisco's worldwide website at
      http://www.cisco.com/en/US/products/products_security_vulnerability_policy.h
      tml.
      This includes instructions for press inquiries regarding
      Cisco security notices. All Cisco security advisories are available at
      http://www.cisco.com/go/psirt.
      
      +--------------------------------------------------------------------
      Copyright 2010-2011 Cisco Systems, Inc. All rights reserved.
      +--------------------------------------------------------------------
      
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