[apops] Cisco Security Advisory: Cisco IOS Software IPS and Zone-Based F

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  • Subject: [apops] Cisco Security Advisory: Cisco IOS Software IPS and Zone-Based Firewall Vulnerabilities
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  • Date: Wed, 28 Sep 2011 12:00:00 -0400
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      Cisco Security Advisory: Cisco IOS Software IPS and Zone-Based
      Firewall Vulnerabilities
      
      Advisory ID: cisco-sa-20110928-zbfw
      
      Revision 1.0
      
      For Public Release 2011 September 28 1600 UTC (GMT)
      
      +--------------------------------------------------------------------
      
      Summary
      =======
      
      Cisco IOS Software contains two vulnerabilities related to Cisco IOS
      Intrusion Prevention System (IPS) and Cisco IOS Zone-Based Firewall
      features. These vulnerabilities are:
      
        * Memory leak in Cisco IOS Software
        * Cisco IOS Software Denial of Service when processing specially
          crafted HTTP packets
      
      Cisco has released free software updates that address these
      vulnerabilities.
      
      Workarounds that mitigate these vulnerabilities are not available.
      
      This advisory is posted at
      http://www.cisco.com/warp/public/707/cisco-sa-20110928-zbfw.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 running vulnerable versions of Cisco IOS Software
      are affected by two vulnerabilities in Cisco IOS IPS and Cisco IOS
      Zone-Based Firewall. The two vulnerabilities are independent of each
      other. Details to confirm affected configurations are provided below.
      
        * Memory leak in Cisco IOS Software
      
          A device that is configured for either Cisco IOS IPS or Cisco IOS
          Zone-Based Firewall (or both), may experience a memory leak under
          high rates of new session creation flows through the device.
          To determine if a device is configured with Cisco IOS IPS, log
          into the device and issue the "show ip ips interfaces" CLI command.
          If the output shows an IPS rule either in the inbound or outbound
          direction set, then the device is vulnerable. This example, shows
          a device with an IPS rule set on Interface Gigabit Ethernet 0/0
          in the inbound direction:
      
              Router#show ip ips interfaces
                  Interface Configuration
                    Interface GigabitEthernet0/0
                      Inbound IPS rule is example_ips_rule
                      Outgoing IPS rule is not set
              Router#
      
          A device that is not configured for Cisco IOS IPS will return a
          blank line. The following example shows a device on which Cisco
          IOS IPS is not configured:
      
              Router#show ip ips interfaces
      
              Router#
      
          To determine whether a device is configured with Zone-Based
          Firewall, log into the device and issue the "show zone security"
          CLI command. If the output shows a member interface under a zone
          name, then the device is vulnerable. This example, shows a device
          with Zone-Based Firewall rules configured on both
          GigabitEthernet0/0 and GigabitEthernet0/1
      
              Router#show zone security
              zone self
                Description: System defined zone
      
      
              zone inside
                Description: *** Inside Network ***
                Member Interfaces:
                  GigabitEthernet0/0
      
      
              zone outside
                Description: *** Outside Network ***
                Member Interfaces:
                  GigabitEthernet0/1
      
      
              Router#
      
          Note: The device is vulnerable if configured with Zone-Based
          Firewall, regardless of the type of packet inspection being
          performed.
      
        * Cisco IOS Software Denial of Service when processing specially
          crafted HTTP packets
      
          A device is vulnerable if configured under the following
          circumstances:
      
          - HTTP Layer 7 Application Control and Inspection and Cisco IOS
          IPS are enabled.
          - HTTP Layer 7 Application Control and Inspection with match
          request arg regex parameter on the HTTP class map. This
          configuration is affected regardless if Cisco IOS IPS is enabled
          or not.
      
          The device is not vulnerable under other configurations. A
          summary of different configurations and their affect by this
          vulnerability is provided below:
      
          +--------------------------------------------------------+
          |                                            | Affected  |
          |          Configuration on Device           |  or not   |
          |                                            | Affected  |
          |--------------------------------------------+-----------|
          | Only Cisco IOS IPS enabled                 | Not       |
          |                                            | Affected  |
          |--------------------------------------------+-----------|
          | HTTP Layer 4 Stateful Inspection with      | Not       |
          | Cisco IOS IPS enabled                      | Affected  |
          |--------------------------------------------+-----------|
          | HTTP Layer 4 Stateful Inspection with      | Not       |
          | Cisco IOS IPS disabled                     | Affected  |
          |--------------------------------------------+-----------|
          | HTTP Layer 7 Application Control and       | Affected  |
          | Inspection with Cisco IOS IPS enabled      |           |
          |--------------------------------------------+-----------|
          | HTTP Layer 7 Application Control and       |           |
          | Inspection with match arg regex parameter. | Affected  |
          | With or without Cisco IOS IPS enabled.     |           |
          |--------------------------------------------+-----------|
          | HTTP Layer 7 Application Control and       |           |
          | Inspection without match arg regex         | Not       |
          | parameter. With or without Cisco IOS IPS   | Affected  |
          | enabled.                                   |           |
          +--------------------------------------------------------+
      
          The following example shows an affected device configured with
          HTTP Layer 7 Application Control and Inspection and Cisco IOS IPS
          enabled:
      
              !
              ip ips name myips
              !
              ip ips signature-category
                category all
                 retired true
                category ios_ips basic
                 retired false
              !
              !
              class-map type inspect match-any layer4-classmap
               match protocol http
              !
              class-map type inspect http match-any layer7-classmap
                match  request arg length gt 15
              !
              !
              policy-map type inspect http layer7-policymap
               class type inspect http layer7-classmap
                reset
                log
              policy-map type inspect layer4-policymap
               class type inspect layer4-classmap
                inspect
                service-policy http layer7-policymap
               class class-default
                drop
              !
              zone security inside
               description ** Inside Network **
              zone security outside
               description ** Outside Network **
              zone-pair security in2out source inside destination outside
               description ** Zone Pair - inside to outside **
               service-policy type inspect layer4-policymap
              !
              !
              interface GigabitEthernet0/0
               ip address 192.168.0.6 255.255.255.0
               ip ips myips in
               zone-member security inside
              !
              interface GigabitEthernet0/1
               ip address 192.168.1.1 255.255.255.0
               zone-member security outside
              !
      
          The following example shows an affected device configured with
          HTTP Layer 7 Application Control and Inspection with the match
          request arg regex parameter on the HTTP class map:
      
              !
              parameter-map type regex example
               pattern [^\x00-\x80]
              !
              class-map type inspect match-any layer4-classmap
               match protocol http
              !
              class-map type inspect http match-any layer7-classmap
               match  request arg regex example
              !
              !
              policy-map type inspect http layer7-policymap
               class type inspect http layer7-classmap
                reset
                log
              policy-map type inspect layer4-policymap
               class type inspect layer4-classmap
                inspect
                service-policy http layer7-policymap
               class class-default
                drop
              !
              zone security inside
               description ** Inside Network **
              zone security outside
               description ** Outside Network **
              zone-pair security in2out source inside destination outside
               description ** Zone Pair - inside to outside **
               service-policy type inspect layer4-policymap
              !
              interface GigabitEthernet0/0
               ip address 192.168.0.6 255.255.255.0
               zone-member security inside
              !
              interface GigabitEthernet0/1
               ip address 192.168.1.1 255.255.255.0
               zone-member security outside
              !
      
      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 at
      http://www.cisco.com/web/about/security/intelligence/ios-ref.html.
      
      Products Confirmed Not Vulnerable
      +--------------------------------
      
      The following products are confirmed not vulnerable:
      
        * Cisco PIX 500 Series Firewall
        * Cisco ASA 5500 Series Adaptive Security Appliance
        * Firewall Services Module (FWSM) for Catalyst 6500 Series Switches
          and 7600 Series Routers
        * Virtual Firewall (VFW) application on the multiservice blade
          (MSB) on the Cisco XR 12000 Series Router
        * Cisco ACE Application Control Engine Module
        * Cisco IOS devices configured with legacy Cisco IOS Firewall
          Support
        * Cisco IOS XR Software
        * Cisco IOS XE Software
        * Cisco IPS Appliances
        * Cisco Catalyst 6500 Series ASA Services Module
        * Content Based Access Control (CBAC)
      
      No other Cisco products are currently known to be affected by these
      vulnerabilities.
      
      Details
      =======
      
      Firewalls are networking devices that control access to the network
      assets of an organization. Firewalls are often positioned at the
      entrance points of networks. Cisco IOS Software provides a set of
      security features that allow the configuration of a simple or
      elaborate firewall policy according to particular requirements.
      
      Cisco IOS IPS is an inline, deep-packet inspection feature that
      effectively mitigates a wide range of network attacks.
      
        * Memory leak in Cisco IOS Software
      
          Devices with affected configurations may observe a memory leak
          under high rates of new session creation flows through the
          device.
      
          Logs may indicate a message similar to " *CCE: CCE 7 tuple table
          entry to add not malloced." or "CCE: CCE 7 tuple table adding
          data to invalid hash entry." when the device experiences this
          memory leak.
      
          The output of show processes memory sorted will show an
          increasing amount of memory being held in the "Chunk Manager"
          process in the "Holding" column. The following example shows the
          output of the "show processes memory sorted" CLI command:
      
              Router#show processes memory sorted
              Processor Pool Total:  930768768 Used:   90497932 Free:  840270836
                    I/O Pool Total:   12582912 Used:    6138704 Free:    6444208
      
               PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
                 1   0  130499156   72333476   58304964          0          0 Chunk Manager
      
          For this particular vulnerability applying Zone-Based Policy
          Firewall denial of service protection does not protect against
          the memory leak due to Cisco bug ID CSCtq28732.
      
          This vulnerability is documented in Cisco bug ID CSCti79848 and
          has been assigned Common Vulnerabilities and Exposures (CVE) ID
          CVE-2011-3273.
      
        * Cisco IOS Software Denial of Service when processing specially
          crafted HTTP packets
      
          Devices with affected configurations may hang or crash when
          processing a specially crafted HTTP packets.
      
          If the device supports and is configured with scheduler
          isr-watchdog then the device will reset and reload if the
          vulnerability is exploited, rather than just hang. For more
          information on the "scheduler isr-watchdog" command consult the
          Cisco IOS Configuration Fundamentals Command Reference at the
          following link:
          
          http://www.cisco.com/en/US/docs/ios/fundamentals/command/reference/cf_r1.html#wp1079401
      
          This vulnerability is documented in Cisco bug ID CSCto68554 and has
          been assigned CVE ID CVE-2011-3281.
      
      Vulnerability Scoring Details
      =============================
      
      Cisco has provided scores for the vulnerabilities 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
      
      
      * CSCti79848 ("Memory leak in Cisco IOS Software when device is
      configured with either Cisco IOS IPS or ZBFW")
      
      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
      
      
      * CSCto68554 ("Cisco IOS Software Denial of Service when processing
      specially crafted HTTP packets")
      
      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 these vulnerabilities may result in:
      
        * Memory leak in Cisco IOS Software
      
          The device may run out of memory resulting in instability or the
          device crashing.
      
        * Cisco IOS Software Denial of Service when processing specially
          crafted HTTP packets
      
          The device may crash or hang. If the device hangs, it will have
          to be power cycled to recover. If the device supports and is
          configured with scheduler isr-watchdog then the device will reset
          and reload if the vulnerability is exploited.
      
          For more information on the "scheduler isr-watchdog" command
          consult the Cisco IOS Configuration Fundamentals Command
          Reference at the following link:
          
          http://www.cisco.com/en/US/docs/ios/fundamentals/command/reference/cf_r1.html#wp1079401
      
      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  |  First Fixed Release for All   |
      | 12.0-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------------------------------------------------------|
      | There are no affected 12.0 based releases                  |
      |------------------------------------------------------------|
      |  Affected  | First Fixed  |  First Fixed Release for All   |
      | 12.1-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------+--------------+--------------------------------|
      | 12.1E      | Not          | 12.2(18)SXF17b                 |
      |            | Vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |  Affected  | First Fixed  |  First Fixed Release for All   |
      | 12.2-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------+--------------+--------------------------------|
      | 12.2       | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2B      | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2BC     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2BW     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2BX     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SB                 |
      |------------+--------------+--------------------------------|
      | 12.2BY     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2BZ     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2CX     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2CY     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2CZ     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SB                 |
      |------------+--------------+--------------------------------|
      | 12.2DA     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2DD     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2DX     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2EU     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            | Not          | Releases up to and including   |
      | 12.2EW     | vulnerable   | 12.2(20)EW4 are not            |
      |            |              | vulnerable.                    |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2EWA    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2EX     | Not          | 12.2(55)EX3                    |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2EY     | Not          | 12.2(58)EY                     |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2EZ     | Not          | Vulnerable; migrate to any     |
      |            | vulnerable   | release in 15.0SE              |
      |------------+--------------+--------------------------------|
      | 12.2FX     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      | 12.2FY     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2EX                 |
      |------------+--------------+--------------------------------|
      | 12.2FZ     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      | 12.2IRA    | Not          | Vulnerable; migrate to any     |
      |            | vulnerable   | release in 12.2IRG             |
      |------------+--------------+--------------------------------|
      | 12.2IRB    | Not          | Vulnerable; migrate to any     |
      |            | vulnerable   | release in 12.2IRG             |
      |------------+--------------+--------------------------------|
      | 12.2IRC    | Not          | Vulnerable; migrate to any     |
      |            | vulnerable   | release in 12.2IRG             |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IRD    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IRE    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2IRF    | Not          | Vulnerable; migrate to any     |
      |            | vulnerable   | release in 12.2IRG             |
      |------------+--------------+--------------------------------|
      | 12.2IRG    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXA    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXB    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXC    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXD    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXE    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXF    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXG    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2IXH    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2JA     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2JK     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2MB     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2MC     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2MRA    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SRD                |
      |------------+--------------+--------------------------------|
      | 12.2MRB    | Not          | 12.2(33)MRB5                   |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Releases prior to 12.2(30)S    |
      |            | Not          | are vulnerable; Releases 12.2  |
      | 12.2S      | vulnerable   | (30)S and later are not        |
      |            |              | vulnerable. First fixed in     |
      |            |              | Release 12.2SB                 |
      |------------+--------------+--------------------------------|
      |            | Not          | 12.2(31)SB20                   |
      | 12.2SB     | vulnerable   |                                |
      |            |              | 12.2(33)SB10                   |
      |------------+--------------+--------------------------------|
      | 12.2SBC    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SB                 |
      |------------+--------------+--------------------------------|
      | 12.2SCA    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SCC                |
      |------------+--------------+--------------------------------|
      | 12.2SCB    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SCC                |
      |------------+--------------+--------------------------------|
      | 12.2SCC    | Not          | 12.2(33)SCC7                   |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SCD    | Not          | 12.2(33)SCD6                   |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            | Not          | 12.2(33)SCE1                   |
      | 12.2SCE    | vulnerable   |                                |
      |            |              | 12.2(33)SCE2                   |
      |------------+--------------+--------------------------------|
      | 12.2SCF    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            | Not          | 12.2(55)SE3                    |
      | 12.2SE     | vulnerable   |                                |
      |            |              | 12.2(58)SE                     |
      |------------+--------------+--------------------------------|
      | 12.2SEA    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      | 12.2SEB    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      | 12.2SEC    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      | 12.2SED    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      | 12.2SEE    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      | 12.2SEF    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SE                 |
      |------------+--------------+--------------------------------|
      |            |              | Releases prior to 12.2(25)SEG4 |
      |            | Not          | are vulnerable; Releases 12.2  |
      | 12.2SEG    | vulnerable   | (25)SEG4 and later are not     |
      |            |              | vulnerable. First fixed in     |
      |            |              | Release 12.2EX                 |
      |------------+--------------+--------------------------------|
      |            |              | Releases prior to 12.2(53)SG4  |
      | 12.2SG     | Not          | are vulnerable; Releases 12.2  |
      |            | vulnerable   | (53)SG4 and later are not      |
      |            |              | vulnerable.                    |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2SGA    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2SL     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2SM     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2SO     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SQ     | Not          | 12.2(50)SQ3                    |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SRA    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SRD                |
      |------------+--------------+--------------------------------|
      | 12.2SRB    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SRD                |
      |------------+--------------+--------------------------------|
      | 12.2SRC    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SRD                |
      |------------+--------------+--------------------------------|
      | 12.2SRD    | Not          | 12.2(33)SRD6                   |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SRE    | Not          | 12.2(33)SRE4                   |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2STE    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SU     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      |            |              | Releases prior to 12.2(29a)SV  |
      |            | Not          | are vulnerable; Releases 12.2  |
      | 12.2SV     | vulnerable   | (29a)SV and later are not      |
      |            |              | vulnerable. Migrate to any     |
      |            |              | release in 12.2SVD             |
      |------------+--------------+--------------------------------|
      | 12.2SVA    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SVC    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SVD    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SVE    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2SW     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2SX     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SXF                |
      |------------+--------------+--------------------------------|
      | 12.2SXA    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SXF                |
      |------------+--------------+--------------------------------|
      | 12.2SXB    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SXF                |
      |------------+--------------+--------------------------------|
      | 12.2SXD    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SXF                |
      |------------+--------------+--------------------------------|
      | 12.2SXE    | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SXF                |
      |------------+--------------+--------------------------------|
      | 12.2SXF    | Not          | 12.2(18)SXF17b                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SXH    | Not          | 12.2(33)SXH8a                  |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SXI    | Not          | 12.2(33)SXI6                   |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SXJ    | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SY     | Not          | 12.2(50)SY                     |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2SZ     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SB                 |
      |------------+--------------+--------------------------------|
      | 12.2T      | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2TPC    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2XA     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XB     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2XC     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XD     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XE     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XF     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XG     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XH     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XI     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XJ     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XK     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XL     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XM     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XN     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 12.2XNA    | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 12.2XNB    | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 12.2XNC    | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 12.2XND    | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 12.2XNE    | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 12.2XNF    | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            |              | Releases prior to 12.2(54)XO   |
      | 12.2XO     | Not          | are vulnerable; Releases 12.2  |
      |            | vulnerable   | (54)XO and later are not       |
      |            |              | vulnerable.                    |
      |------------+--------------+--------------------------------|
      | 12.2XQ     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XR     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XS     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XT     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XU     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XV     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2XW     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2YA     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2YB     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2YC     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2YD     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2YE     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YF     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YG     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YH     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YJ     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2YK     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YL     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2YM     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YN     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2YO     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2YP     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YQ     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YR     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YS     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YT     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YU     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YV     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YW     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YX     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YY     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2YZ     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2ZA     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SXF                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2ZB     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2ZC     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2ZD     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2ZE     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2ZF     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2ZG     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2ZH     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.4                   |
      |------------+--------------+--------------------------------|
      | 12.2ZJ     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2ZL     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 12.2ZP     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      | 12.2ZU     | Not          | Vulnerable; first fixed in     |
      |            | vulnerable   | Release 12.2SXH                |
      |------------+--------------+--------------------------------|
      | 12.2ZX     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2ZY     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 12.2ZYA    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |  Affected  | First Fixed  |  First Fixed Release for All   |
      | 12.3-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------------------------------------------------------|
      | There are no affected 12.3 based releases                  |
      |------------------------------------------------------------|
      |  Affected  | First Fixed  |  First Fixed Release for All   |
      | 12.4-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------------------------------------------------------|
      | There are no affected 12.4 based releases                  |
      |------------------------------------------------------------|
      |  Affected  | First Fixed  |  First Fixed Release for All   |
      | 15.0-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------+--------------+--------------------------------|
      | 15.0M      | 15.0(1)M7    | 15.0(1)M7                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 15.0MR     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 15.0MRA    | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 15.0S      | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 15.0SA     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      | 15.0SE     | Not          | Not vulnerable                 |
      |            | vulnerable   |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 15.0SG     | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            | Vulnerable;  |                                |
      | 15.0XA     | first fixed  | Vulnerable; first fixed in     |
      |            | in Release   | Release 15.1T                  |
      |            | 15.1T        |                                |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 15.0XO     | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |  Affected  | First Fixed  |  First Fixed Release for All   |
      | 15.1-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 15.1EY     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            | Vulnerable;  |                                |
      | 15.1GC     | first fixed  | Vulnerable; first fixed in     |
      |            | in Release   | Release 15.1T                  |
      |            | 15.1T        |                                |
      |------------+--------------+--------------------------------|
      | 15.1M      | 15.1(4)M1    | 15.1(4)M2; Available on        |
      |            |              | 30-SEP-11                      |
      |------------+--------------+--------------------------------|
      |            |              | Vulnerable; contact your       |
      |            | Not          | support organization per the   |
      | 15.1MR     | vulnerable   | instructions in the Obtaining  |
      |            |              | Fixed Software section of this |
      |            |              | advisory.                      |
      |------------+--------------+--------------------------------|
      |            | See Cisco    |                                |
      | 15.1S      | IOS-XE       | See Cisco IOS-XE Software      |
      |            | Software     | Availability                   |
      |            | Availability |                                |
      |------------+--------------+--------------------------------|
      |            | 15.1(1)T4;   |                                |
      |            | Available on |                                |
      |            | 08-Dec-2011  | 15.1(2)T4                      |
      | 15.1T      |              |                                |
      |            | 15.1(2)T4    | 15.1(1)T4 on 8-Dec-2011        |
      |            |              |                                |
      |            | 15.1(3)T2    |                                |
      |------------+--------------+--------------------------------|
      |            | Vulnerable;  |                                |
      | 15.1XB     | first fixed  | Vulnerable; first fixed in     |
      |            | in Release   | Release 15.1T                  |
      |            | 15.1T        |                                |
      |------------+--------------+--------------------------------|
      |  Affected  | First Fixed  |  First Fixed Release for All   |
      | 15.2-Based | Release for  |  Advisories in the September   |
      |  Releases  |     This     |    2011 Bundled Publication    |
      |            |   Advisory   |                                |
      |------------------------------------------------------------|
      | There are no affected 15.2 based releases                  |
      +------------------------------------------------------------+
      
      Cisco IOS XE Software
      +--------------------
      
      Cisco IOS XE Software is not affected by the vulnerabilities
      disclosed in this document.
      
      +------------------------------------------------------------+
      |  Cisco   |  First Fixed   |  First Fixed Release for All   |
      |  IOS XE  |  Release For   |  Advisories in the September   |
      | Release  | This Advisory  |    2011 Bundled Publication    |
      |----------+----------------+--------------------------------|
      | 2.1.x    | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 2.2.x    | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 2.3.x    | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 2.4.x    | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 2.5.x    | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 2.6.x    | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 3.1.xS   | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 3.1.xSG  | Not vulnerable | Vulnerable; migrate to 3.2.0SG |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 3.2.xS   | Not vulnerable | Vulnerable; migrate to 3.3.2S  |
      |          |                | or later                       |
      |----------+----------------+--------------------------------|
      | 3.2.xSG  | Not vulnerable | Not vulnerable                 |
      |----------+----------------+--------------------------------|
      | 3.3.xS   | Not vulnerable | 3.3.2S                         |
      |----------+----------------+--------------------------------|
      | 3.4.xS   | Not vulnerable | Not 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 the vulnerabilities
      disclosed in this document.
      
      Cisco IOS XR Software is not affected by any of the vulnerabilities
      in the September 2011 bundled publication.
      
      Workarounds
      ===========
      
      Workarounds that mitigate these vulnerabilities are not available.
      
      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 vulnerabilities described in this advisory.
      
      These vulnerabilities were discovered while handling customer support
      calls.
      
      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-zbfw.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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