[apops] Cisco Security Advisory: Cisco 10000 Series Denial of Service Vu

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  • Subject: [apops] Cisco Security Advisory: Cisco 10000 Series Denial of Service Vulnerability
  • From: Cisco Systems Product Security Incident Response Team <psirt at cisco dot com>
  • Date: Wed, 28 Sep 2011 12:00:00 -0400
  • Cc: psirt at cisco dot com
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      Cisco Security Advisory: Cisco 10000 Series Denial of Service
      Vulnerability
      
      Advisory ID: cisco-sa-20110928-c10k
      
      Revision 1.0
      
      For Public Release 2011 September 28 1600 UTC (GMT)
      
      +---------------------------------------------------------------------
      
      Summary
      =======
      
      The Cisco 10000 Series Router is affected by a denial of service
      (DoS) vulnerability that can allow an attacker to cause a device
      reload by sending a series of ICMP packets.
      
      Cisco has released free software updates that address this
      vulnerability.
      
      Workarounds that mitigate this vulnerability are also available.
      
      This advisory is posted at
      http://www.cisco.com/warp/public/707/cisco-sa-20110928-c10k.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 10000 Series Routers that are running an affected version of
      Cisco IOS are affected.
      
      To determine the Cisco IOS Software release that is running on a Cisco
      product, administrators can log in to the device and issue the "show
      version" command to display the system banner. The system banner
      confirms that the device is running Cisco IOS Software by displaying
      text similar to "Cisco Internetwork Operating System Software" or "Cisco
      IOS Software." The image name displays in parentheses, followed by
      "Version" and the Cisco IOS Software release name. Other Cisco devices
      do not have the "show version" command or may provide different output.
      
      The following example identifies a Cisco product that is running
      Cisco IOS Software Release 15.0(1)M1 with an installed image name of
      C3900-UNIVERSALK9-M:
      
          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
      
          !--- output truncated
      
      Additional information about Cisco IOS Software release naming
      conventions is available in the white paper Cisco IOS and NX-OS
      Software Reference Guide available at:
      
      http://www.cisco.com/web/about/security/intelligence/ios-ref.html.
      
      Products Confirmed Not Vulnerable
      +--------------------------------
      
      Cisco IOS XR Software is not affected by this vulnerability.
      
      Cisco IOS XE Software is not affected by this vulnerability.
      
      No other Cisco products are currently known to be affected by this
      vulnerability.
      
      Details
      =======
      
      The Cisco 10000 Series Router is affected by a denial of service
      (DoS) vulnerability where an unauthenticated attacker could cause a
      device reload by sending a series of ICMP packets.
      
      Traffic destined to the device or transit traffic could trigger the
      effects of this vulnerability.
      
      This vulnerability is documented in Cisco Bug ID CSCtk62453 and has been
      assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-3270.
      
      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
      
      
      * CSCtk62453 ("Certain ICMP packets may cause device to reload")
      
      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 this vulnerability could cause an affected
      device to reload. Repeated exploitation could result in a sustained
      DoS condition.
      
      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 for   |
      | 12.0-Based |   First Fixed    |   All Advisories in the    |
      |  Releases  |     Release      |   September 2011 Bundled   |
      |            |                  |        Publication         |
      |------------------------------------------------------------|
      | There are no affected 12.0 based releases                  |
      |------------------------------------------------------------|
      |  Affected  |                  |  First Fixed Release for   |
      | 12.1-Based |   First Fixed    |   All Advisories in the    |
      |  Releases  |     Release      |   September 2011 Bundled   |
      |            |                  |        Publication         |
      |------------------------------------------------------------|
      | There are no affected 12.1 based releases                  |
      |------------------------------------------------------------|
      |  Affected  |                  |  First Fixed Release for   |
      | 12.2-Based |   First Fixed    |   All Advisories in the    |
      |  Releases  |     Release      |   September 2011 Bundled   |
      |            |                  |        Publication         |
      |------------+------------------+----------------------------|
      | 12.2       | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      | 12.2B      | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      | 12.2BC     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      | 12.2BW     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2BX     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SB             |
      |------------+------------------+----------------------------|
      | 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             |
      |------------+------------------+----------------------------|
      | 12.2CZ     | Not vulnerable   | Vulnerable; First 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   |
      | 12.2EWA    | Not vulnerable   | the 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                 |
      |------------+------------------+----------------------------|
      | 12.2EZ     | Not vulnerable   | Vulnerable; migrate to any |
      |            |                  | release in 15.0SE          |
      |------------+------------------+----------------------------|
      | 12.2FX     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      | 12.2FY     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2EX             |
      |------------+------------------+----------------------------|
      | 12.2FZ     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      | 12.2IRA    | Not vulnerable   | Vulnerable; migrate to any |
      |            |                  | release in 12.2IRG         |
      |------------+------------------+----------------------------|
      | 12.2IRB    | Not vulnerable   | Vulnerable; migrate to any |
      |            |                  | release in 12.2IRG         |
      |------------+------------------+----------------------------|
      | 12.2IRC    | Not vulnerable   | Vulnerable; migrate to any |
      |            |                  | release in 12.2IRG         |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IRD    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IRE    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2IRF    | Not vulnerable   | Vulnerable; migrate to any |
      |            |                  | release in 12.2IRG         |
      |------------+------------------+----------------------------|
      | 12.2IRG    | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXA    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXB    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXC    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXD    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXE    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXF    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXG    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2IXH    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2JA     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2JK     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2MB     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2MC     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      | 12.2MRA    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SRD            |
      |------------+------------------+----------------------------|
      | 12.2MRB    | Not vulnerable   | 12.2(33)MRB5               |
      |------------+------------------+----------------------------|
      |            |                  | 12.2(30)S are vulnerable;  |
      |            |                  | Releases12.2(30)S and      |
      | 12.2S      | Not vulnerable   | later are not vulnerable.  |
      |            |                  | First fixed in Release     |
      |            |                  | 12.2SB                     |
      |------------+------------------+----------------------------|
      |            | Releases prior   |                            |
      |            | to 12.2(31)SB18  |                            |
      |            | and 12.2(33)SB9  | 12.2(31)SB20               |
      | 12.2SB     | are not          |                            |
      |            | vulnerable.      | 12.2(33)SB10               |
      |            |                  |                            |
      |            | 12.2(33)SB10     |                            |
      |------------+------------------+----------------------------|
      | 12.2SBC    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SB             |
      |------------+------------------+----------------------------|
      | 12.2SCA    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SCC            |
      |------------+------------------+----------------------------|
      | 12.2SCB    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SCC            |
      |------------+------------------+----------------------------|
      | 12.2SCC    | Not vulnerable   | 12.2(33)SCC7               |
      |------------+------------------+----------------------------|
      | 12.2SCD    | Not vulnerable   | 12.2(33)SCD6               |
      |------------+------------------+----------------------------|
      |            |                  | 12.2(33)SCE1               |
      | 12.2SCE    | Not vulnerable   |                            |
      |            |                  | 12.2(33)SCE2               |
      |------------+------------------+----------------------------|
      | 12.2SCF    | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      |            |                  | 12.2(55)SE3                |
      | 12.2SE     | Not vulnerable   |                            |
      |            |                  | 12.2(58)SE                 |
      |------------+------------------+----------------------------|
      | 12.2SEA    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      | 12.2SEB    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      | 12.2SEC    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      | 12.2SED    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      | 12.2SEE    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      | 12.2SEF    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SE             |
      |------------+------------------+----------------------------|
      |            |                  | Releases prior to 12.2(25) |
      |            |                  | SEG4 are vulnerable;       |
      | 12.2SEG    | Not vulnerable   | Releases12.2(25)SEG4 and   |
      |            |                  | later are not vulnerable.  |
      |            |                  | First fixed in Release     |
      |            |                  | 12.2EX                     |
      |------------+------------------+----------------------------|
      |            |                  | Releases prior to 12.2(53) |
      | 12.2SG     | Not vulnerable   | SG4 are vulnerable;        |
      |            |                  | Releases 12.2(53)SG4 and   |
      |            |                  | later are not vulnerable.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2SGA    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2SL     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2SM     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2SO     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2SQ     | Not vulnerable   | 12.2(50)SQ3                |
      |------------+------------------+----------------------------|
      | 12.2SRA    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SRD            |
      |------------+------------------+----------------------------|
      | 12.2SRB    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SRD            |
      |------------+------------------+----------------------------|
      | 12.2SRC    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SRD            |
      |------------+------------------+----------------------------|
      | 12.2SRD    | Not vulnerable   | 12.2(33)SRD6               |
      |------------+------------------+----------------------------|
      | 12.2SRE    | Not vulnerable   | 12.2(33)SRE4               |
      |------------+------------------+----------------------------|
      | 12.2STE    | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2SU     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      |            |                  | Releases prior to 12.2     |
      |            |                  | (29a)SV are vulnerable;    |
      | 12.2SV     | Not vulnerable   | Releases 12.2(29a)SV and   |
      |            |                  | later are not vulnerable.  |
      |            |                  | Migrate to any 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             |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2SW     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2SX     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SXF            |
      |------------+------------------+----------------------------|
      | 12.2SXA    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SXF            |
      |------------+------------------+----------------------------|
      | 12.2SXB    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SXF            |
      |------------+------------------+----------------------------|
      | 12.2SXD    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SXF            |
      |------------+------------------+----------------------------|
      | 12.2SXE    | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SXF            |
      |------------+------------------+----------------------------|
      | 12.2SXF    | Not vulnerable   | 12.2(18)SXF17b             |
      |------------+------------------+----------------------------|
      | 12.2SXH    | Not vulnerable   | 12.2(33)SXH8a              |
      |------------+------------------+----------------------------|
      | 12.2SXI    | Not vulnerable   | 12.2(33)SXI6               |
      |------------+------------------+----------------------------|
      | 12.2SXJ    | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2SY     | Not vulnerable   | 12.2(50)SY                 |
      |------------+------------------+----------------------------|
      | 12.2SZ     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SB             |
      |------------+------------------+----------------------------|
      | 12.2T      | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2TPC    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2XA     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2XB     | Not vulnerable   | Vulnerable; First 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 IOS-XE    |
      | 12.2XNA    | IOS-XE Software  | Software Availability      |
      |            | Availability     |                            |
      |------------+------------------+----------------------------|
      |            | Please see Cisco | Please see Cisco IOS-XE    |
      | 12.2XNB    | IOS-XE Software  | Software Availability      |
      |            | Availability     |                            |
      |------------+------------------+----------------------------|
      |            | Please see Cisco | Please see Cisco IOS-XE    |
      | 12.2XNC    | IOS-XE Software  | Software Availability      |
      |            | Availability     |                            |
      |------------+------------------+----------------------------|
      |            | Please see Cisco | Please see Cisco IOS-XE    |
      | 12.2XND    | IOS-XE Software  | Software Availability      |
      |            | Availability     |                            |
      |------------+------------------+----------------------------|
      |            | Please see Cisco | Please see Cisco IOS-XE    |
      | 12.2XNE    | IOS-XE Software  | Software Availability      |
      |            | Availability     |                            |
      |------------+------------------+----------------------------|
      |            | Please see Cisco | Please see Cisco IOS-XE    |
      | 12.2XNF    | IOS-XE Software  | Software Availability      |
      |            | Availability     |                            |
      |------------+------------------+----------------------------|
      |            |                  | Releases prior to 12.2(54) |
      | 12.2XO     | Not vulnerable   | XO are vulnerable;         |
      |            |                  | Releases12.2(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             |
      |------------+------------------+----------------------------|
      | 12.2YA     | Not vulnerable   | 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 your   |
      |            |                  | support organization per   |
      | 12.2YF     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YG     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YH     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YJ     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2YK     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YL     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2YM     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YN     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2YO     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2YP     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YQ     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YR     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YS     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YT     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YU     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YV     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YW     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YX     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YY     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2YZ     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2ZA     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SXF            |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2ZB     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2ZC     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2ZD     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2ZE     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      | 12.2ZF     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      | 12.2ZG     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2ZH     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.4               |
      |------------+------------------+----------------------------|
      | 12.2ZJ     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2ZL     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 12.2ZP     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 12.2ZU     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 12.2SXH            |
      |------------+------------------+----------------------------|
      | 12.2ZX     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2ZY     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 12.2ZYA    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |  Affected  |                  |  First Fixed Release for   |
      | 12.3-Based |   First Fixed    |   All Advisories in the    |
      |  Releases  |     Release      |   September 2011 Bundled   |
      |            |                  |        Publication         |
      |------------------------------------------------------------|
      | There are no affected 12.3 based releases                  |
      |------------------------------------------------------------|
      |  Affected  |                  |  First Fixed Release for   |
      | 12.4-Based |   First Fixed    |   All Advisories in the    |
      |  Releases  |     Release      |   September 2011 Bundled   |
      |            |                  |        Publication         |
      |------------------------------------------------------------|
      | There are no affected 12.4 based releases                  |
      |------------------------------------------------------------|
      |  Affected  |   First Fixed    |                            |
      | 15.0-Based |     Release      | Bundle First Fixed Release |
      |  Releases  |                  |                            |
      |------------+------------------+----------------------------|
      | 15.0M      | Not vulnerable   | 15.0(1)M7                  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 15.0MR     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 15.0MRA    | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 15.0S      | 15.0(1)S3a       | 15.0(1)S4                  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 15.0SA     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 15.0SE     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 15.0SG     | Not vulnerable   | Not vulnerable             |
      |------------+------------------+----------------------------|
      | 15.0XA     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 15.1T              |
      |------------+------------------+----------------------------|
      |            |                  | Releases prior to 15.0(2)  |
      | 15.0XO     | Not vulnerable   | XO1 are vulnerable;        |
      |            |                  | Releases15.0(2)XO1 and     |
      |            |                  | later are not vulnerable.  |
      |------------+------------------+----------------------------|
      |  Affected  |                  |  First Fixed Release for   |
      | 15.1-Based |   First Fixed    |   All Advisories in the    |
      |  Releases  |     Release      |   September 2011 Bundled   |
      |            |                  |        Publication         |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 15.1EY     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      | 15.1GC     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 15.1T              |
      |------------+------------------+----------------------------|
      | 15.1M      | Not vulnerable   | 15.1(4)M2; Available on    |
      |            |                  | 30-SEP-11                  |
      |------------+------------------+----------------------------|
      |            |                  | Vulnerable; contact your   |
      |            |                  | support organization per   |
      | 15.1MR     | Not vulnerable   | the instructions in the    |
      |            |                  | Obtaining Fixed Software   |
      |            |                  | section of this advisory.  |
      |------------+------------------+----------------------------|
      |            |                  | 15.1(2)S2                  |
      | 15.1S      | Not vulnerable   |                            |
      |            |                  | 15.1(3)S                   |
      |------------+------------------+----------------------------|
      |            |                  | 15.1(2)T4                  |
      | 15.1T      | Not vulnerable   |                            |
      |            |                  | 15.1(1)T4 on 8-Dec-2011    |
      |------------+------------------+----------------------------|
      | 15.1XB     | Not vulnerable   | Vulnerable; First fixed in |
      |            |                  | Release 15.1T              |
      |------------+------------------+----------------------------|
      |  Affected  |                  |  First Fixed Release for   |
      | 15.2-Based |   First Fixed    |   All Advisories in the    |
      |  Releases  |     Release      |   September 2011 Bundled   |
      |            |                  |        Publication         |
      |------------------------------------------------------------|
      | There are no affected 15.2 based releases                  |
      +------------------------------------------------------------+
      
      Cisco IOS XE Software
      +--------------------
      
      Cisco IOS XE Software is not affected by the vulnerability disclosed
      in this advisory.
      
      Cisco IOS XR Software
      +--------------------
      
      Cisco IOS XR Software is not affected by the vulnerability disclosed
      in this advisory.
      
      Cisco IOS XR Software is not affected by the vulnerabilities
      disclosed in the September 28, 2011, Cisco IOS Software Security
      Advisory bundled publication.
      
      Workarounds
      ===========
      
      Traffic destined to the device or transit traffic could trigger the
      effects of this vulnerability. Subsequently, the only workaround
      available is to block ICMP packets destined to the affected device
      and all ICMP transit traffic.
      
      Obtaining Fixed Software
      ========================
      
      Cisco has released free software updates that address this
      vulnerability. 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 while troubleshooting a customer
      service request.
      
      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-20110928-c10k.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.html.
      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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