[apops] Cisco Security Advisory: Cisco IOS Software Zone-Based Firewall

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  • Subject: [apops] Cisco Security Advisory: Cisco IOS Software Zone-Based Firewall Vulnerabilities
  • From: Cisco Systems Product Security Incident Response Team <psirt at cisco dot com>
  • Date: Wed, 28 Mar 2012 12:20:57 -0400
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      Cisco Security Advisory: Cisco IOS Software Zone-Based Firewall Vulnerabilities
      
      Advisory ID: cisco-sa-20120328-zbfw
      
      Revision 1.0
      
      For Public Release 2012 March 28 16:00  UTC (GMT)
      +---------------------------------------------------------------------
      
      Summary
      =======
      
      Cisco IOS Software contains four vulnerabilities related to Cisco IOS
      Zone-Based Firewall features. These vulnerabilities are as follows:
      
        * Memory Leak Associated with Crafted IP Packets 
        * Memory Leak in HTTP Inspection 
        * Memory Leak in H.323 Inspection 
        * Memory Leak in SIP Inspection 
      
      Workarounds that mitigate these vulnerabilities are not available.
      
      Cisco has released free software updates that address these
      vulnerabilities.
      
      This advisory is available at the following link: 
      http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-zbfw
      
      
      Note: The March 28, 2012, Cisco IOS Software Security Advisory
      bundled publication includes nine Cisco Security Advisories. 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 March 2012 bundled publication.
      
      Individual publication links are in "Cisco Event Response:
      Semi-Annual Cisco IOS Software Security Advisory Bundled Publication"
      at the following link:
      
      http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar12.html
      
      Affected Products
      =================
      
      
      Vulnerable Products
      +------------------
      
      Cisco IOS devices running vulnerable versions of Cisco IOS Software
      are affected by four vulnerabilities in the Cisco IOS Zone-Based
      Firewall. The vulnerabilities are independent of each other. Details
      to confirm affected configurations are provided below.
      
      To determine whether a device is configured with Zone-Based Firewall,
      log in to the device and issue the show zone security command-line
      interface (CLI) command. If the output shows a member interface under
      a zone name, the device is vulnerable. The following 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#
      
      The following sections provide more details on the specific features
      containing the vulnerabilities.
      
      Memory Leak Associated with Crafted IP Packets
      +---------------------------------------------
      There is no specific configuration necessary for a device to be
      vulnerable to the memory leak associated with crafted IP packets. If
      the Zone-Based Firewall is configured, the device is vulnerable.
      
      Memory Leak in HTTP Inspection
      +-----------------------------
      For the device to be vulnerable to the memory leak associated with
      HTTP inspection, the Zone-Based Firewall must be configured to
      perform HTTP inspection with the Zone-Based Firewall.
      
      To determine whether a device is configured for HTTP inspection,
      enter the command show policy-map type inspect zone-pair | include
      Match: protocol http. The following example shows a vulnerable device
      configured with Cisco IOS Zone-Based Policy Firewall HTTP inspection:
      
      Router#show policy-map type inspect zone-pair | include Match: protocol http 
             Match: protocol http
       
      Memory Leak in H.323 Inspection
      +------------------------------
      For a device to be vulnerable to the memory leak associated with
      H.323 inspection, the Zone-Based Firewall must be configured to
      perform H.323 inspection. To determine if a device is configured for
      H.323 inspection enter the command show policy-map type inspect
      zone-pair | include Match: protocol h323. If the output contains
      "Match: protocol h323" the device is vulnerable. The following
      example shows a vulnerable device configured with Cisco IOS
      Zone-Based Policy Firewall H.323 inspection:
      
      Router# show policy-map type inspect zone-pair | include Match: protocol h323
              Match: protocol h323
      
      Memory Leak in SIP Inspection
      +----------------------------
      The device is vulnerable if the configuration has either a Layer 4 or
      Layer 7 Session Initiation Protocol (SIP) application-specific policy
      configured, and the policy is applied to any firewall zone. To
      determine whether a device is configured for SIP inspection enter the
      command show policy-map type inspect zone-pair | include Match:
      protocol sip. If the output contains "Match: protocol sip" the device
      is vulnerable. The following example shows a vulnerable device
      configured with Cisco IOS Zone-Based Policy Firewall SIP inspection:
      
      Router# show policy-map type inspect zone-pair | include Match: protocol sip    
              Match: protocol sip
      
      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 "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 Catalyst 6500 Series ASA Services Module
        * Context-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 firewall policy
      to match an organization's requirements. 
      
      The vulnerabilities described in this advisory affect the Zone-Based
      Firewall feature. The Zone-Based Policy Firewall (also known as
      Zone-Policy Firewall or ZFW) updates the firewall configuration from
      the older interface-based model to a more flexible, more easily
      understood zone-based model. Interfaces are assigned to zones, and
      inspection policy is applied to traffic moving between the zones.
      Inter-zone policies offer considerable flexibility and granularity,
      so different inspection policies can be applied to multiple host
      groups connected to the same router interface.
      
      More information on the Zone-Based Firewall is available at:
      http://www.cisco.com/en/US/products/ps6441/products_feature_guide09186a008060f6dd.html
      
      Memory Leak Associated with Crafted IP Packets
      +---------------------------------------------
      
      A vulnerability exists in the Zone-Based Firewall implementation in
      Cisco IOS Software that could allow a remote attacker to cause an
      affected device to reload or to trigger memory leaks that may result
      in system instabilities. These vulnerabilities are triggered when the
      device that is running Cisco IOS Software processes crafted IP
      packets. Only traffic destined to an IP address configured on the
      device can trigger the vulnerability; transit traffic is not an
      exploit vector.
      
      This vulnerability is documented in Cisco bug ID CSCto89536 
      and has been assigned the Common Vulnerabilities and Exposures 
      (CVE) identifier CVE-2012-1310.
      
      Memory Leak in HTTP Inspection
      +---------------------------------------------
      
      The HTTP Inspection Engine feature allows users to configure their
      Cisco IOS Firewall to detect and filter HTTP connections-such as
      tunneling over port 80, unauthorized request methods, and non-HTTP
      compliant file transfers-that are not authorized within the scope of
      the security policy configuration.
      
      A vulnerability exists in the implementation of the Cisco IOS
      Software HTTP inspection feature that could allow a remote attacker
      to cause an affected device to reload or to trigger memory leaks that
      may result in system instabilities. This vulnerability is triggered
      when the device that is running Cisco IOS Software processes certain
      HTTP messages. Transit HTTP traffic is an exploit vector.
      
      This vulnerability is documented in Cisco bug ID CSCtq36153 
      and has been assigned CVE ID CVE-2012-0387.
      
      More information on HTTP inspection is available at:
      http://www.cisco.com/en/US/docs/ios/12_3t/12_3t14/feature/guide/gt_fwapc.html
      
      Memory Leak in H.323 Inspection
      +---------------------------------------------
      H.323 is the ITU standard for real-time multimedia communications and
      conferencing over packet-based (IP) networks. A vulnerability exists
      in the implementation of the Cisco IOS Software H.323 inspection
      feature that could allow a remote attacker to cause an affected
      device to reload or to trigger memory leaks that may result in system
      instabilities. This vulnerability is triggered when the device that
      is running Cisco IOS Software processes malformed H.323 messages.
      Transit H.323 traffic is an exploit vector.
      
      This vulnerability is documented in Cisco bug ID CSCtq45553 
      and has been assigned the CVE ID CVE-2012-0388.
      
      More information on H.323 inspection is available at: 
      http://www.cisco.com/en/US/docs/ios-xml/ios/sec_data_zbf/configuration/15-2mt/fw-h323-v3v4-sup.html
      
      Memory Leak in SIP Inspection
      +---------------------------------------------
      SIP is a popular signaling protocol that is used to manage voice and
      video calls across IP networks, such as the Internet. SIP is
      responsible for handling all aspects of call setup and termination.
      Voice and video are the most popular types of sessions that SIP
      handles, but the protocol has the flexibility to accommodate other
      applications that require call setup and termination. SIP call
      signaling can use UDP (port 5060), TCP (port 5060), or Transport
      Layer Security (TLS; TCP port 5061) as the underlying transport
      protocol.
      
      A vulnerability exists in the implementation of the Cisco IOS SIP
      inspection feature that could allow a remote attacker to cause an
      affected device to reload or to trigger memory leaks that may result
      in system instabilities. This vulnerability is triggered when the
      device that is running Cisco IOS Software processes crafted SIP
      messages. Transit SIP traffic is an exploit vector.
      
      This vulnerability is documented in Cisco bug ID CSCti46171 
      and has been assigned CVE ID CVE-2012-1315.
      
      More information on SIP inspection is available at: 
      http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_sip_alg_aic.html
      
      Memory Leak Detection
      +---------------------------------------------
      Detected memory leaks can be viewed using the command show memory
      debug leaks chunks in privileged EXEC mode, as shown in the following
      example:
      
          Router# show memory debug leaks chunks 
      
          Adding blocks for GD... I/O memory Address Size Alloc_pc PID
          Alloc-Proc Name Chunk Elements:
          AllocPC Address Size Parent Name Processor memory Address Size
          Alloc_pc PID Alloc-Proc Name
          4733113C 188 419CB164 129 IP Input FW h225 tpkt
      
      The previous example shows a memory leak in the process FW h225 tpkt.
      The show memory debug leaks command was introduced in Cisco IOS
      Software versions 12.3(8)T1 and 12.2(25)S.
      
      Caution: All show memory debug commands must be used on customer
      networks only to diagnose the router for memory leaks when memory
      depletion is observed. These commands may cause high CPU utilization
      and may cause time-sensitive protocols to flap. These commands are
      recommended to be used in maintenance windows.
      
      Vulnerability Scoring Details
      =============================
      
      Cisco has scored the vulnerabilities in this advisory based on the
      Common Vulnerability Scoring System (CVSS). The CVSS scoring in this
      security advisory is in accordance with CVSS version 2.0.
      
      CVSS is a standards-based scoring method that conveys vulnerability
      severity and helps organizations determine the urgency and priority
      of a response.
      
      Cisco has provided a base and temporal score. Customers can also
      compute environmental scores that help determine the impact of the
      vulnerability in their own networks.
      
      Cisco has provided additional information regarding CVSS at the
      following link:
      
      http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
      
      Cisco has also provided a CVSS calculator to compute the
      environmental impact for individual networks at the following link:
      
      http://intellishield.cisco.com/security/alertmanager/cvss
      
      
      * Memory Leak associated with crafted IP 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
      
      * Memory Leak in HTTP inspection
      
      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
      
      *  Memory Leak in H.323 inspection
      
      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
      
      
      * Memory Leak in SIP Inspection
      
      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 a
      reload of the affected device. Repeated exploit attempts may result
      in a sustained denial of service (DoS) attack.
      
      Software Versions and Fixes
      ===========================
      
      When considering software upgrades, customers are advised to consult
      the Cisco Security Advisories and Responses archive at:
      http://www.cisco.com/go/psirt and review subsequent advisories to determine
      exposure and a complete upgrade solution.
      
      In all cases, customers should ensure that the devices to be upgraded
      contain sufficient memory and confirm that current hardware and
      software configurations will continue to be supported properly by the
      new release. If the information is not clear, customers are advised
      to contact the Cisco Technical Assistance Center (TAC) or their
      contracted maintenance providers. 
      
      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 column. The First Fixed Release for All Advisories in the
      March 2012 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.
      
      The Cisco IOS Software Checker allows customers to search for Cisco
      Security Advisories that address specific Cisco IOS Software
      releases. This tool is available on the Cisco Security Intelligence
      Operations (SIO) portal at:
      http://tools.cisco.com/security/center/selectIOSVersion.x
      
      +------------------------------------------+
      |   Major    |         Availability of     |
      |  Release   |      Repaired Releases      |
      |------------+-----------------------------|
      |            |              | First Fixed  |
      |            |              | Release for  |
      |            |              |     All      |
      |            |              |  Advisories  |
      |  Affected  | First Fixed  | in the March |
      | 12.0-Based |   Release    |  2012 Cisco  |
      |  Releases  |              | IOS Software |
      |            |              |   Security   |
      |            |              |   Advisory   |
      |            |              |   Bundled    |
      |            |              | Publication  |
      |------------------------------------------|
      |     There are no affected 12.0 based     |
      |                 releases                 |
      |------------------------------------------|
      |            |              | First Fixed  |
      |            |              | Release for  |
      |            |              |     All      |
      |            |              |  Advisories  |
      |  Affected  | First Fixed  | in the March |
      | 12.2-Based |   Release    |  2012 Cisco  |
      |  Releases  |              | IOS Software |
      |            |              |   Security   |
      |            |              |   Advisory   |
      |            |              |   Bundled    |
      |            |              | Publication  |
      |------------------------------------------|
      |     There are no affected 12.2 based     |
      |                 releases                 |
      |------------------------------------------|
      |            |              | First Fixed  |
      |            |              | Release for  |
      |            |              |     All      |
      |            |              |  Advisories  |
      |  Affected  | First Fixed  | in the March |
      | 12.3-Based |   Release    |  2012 Cisco  |
      |  Releases  |              | IOS Software |
      |            |              |   Security   |
      |            |              |   Advisory   |
      |            |              |   Bundled    |
      |            |              | Publication  |
      |------------------------------------------|
      |     There are no affected 12.3 based     |
      |                 releases                 |
      |------------------------------------------|
      |            |              | First Fixed  |
      |            |              | Release for  |
      |            |              |     All      |
      |            |              |  Advisories  |
      |  Affected  | First Fixed  | in the March |
      | 12.4-Based |   Release    |  2012 Cisco  |
      |  Releases  |              | IOS Software |
      |            |              |   Security   |
      |            |              |   Advisory   |
      |            |              |   Bundled    |
      |            |              | Publication  |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4       | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      |            | contact your | contact your |
      |            | support      | support      |
      |            | organization | organization |
      |            | per the      | per the      |
      | 12.4GC     | instructions | instructions |
      |            | in Obtaining | in Obtaining |
      |            | Fixed        | Fixed        |
      |            | Software     | Software     |
      |            | section of   | section of   |
      |            | this         | this         |
      |            | advisory.    | advisory.    |
      |------------+--------------+--------------|
      | 12.4JA     | Not          | 12.4(23c)JA4 |
      |            | vulnerable   | 12.4(25e)JA  |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4JAX    | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 12.4JA       |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JDA    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JDC    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JDD    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JDE    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JHA    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JHB    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JHC    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JK     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4JL     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4JX     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 12.4JA       |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4JY     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 12.4JA       |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4JZ     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 12.4JA       |
      |------------+--------------+--------------|
      |            | 12.4(22)MD3; | 12.4(22)MD3; |
      | 12.4MD     | Available on | Available on |
      |            | 30-MAR-12    | 30-MAR-12    |
      |------------+--------------+--------------|
      | 12.4MDA    | 12.4(24)     | 12.4(24)     |
      |            | MDA11        | MDA11        |
      |------------+--------------+--------------|
      | 12.4MDB    | 12.4(24)     | 12.4(24)     |
      |            | MDB5a        | MDB5a        |
      |------------+--------------+--------------|
      | 12.4MDC    | Not          | Not          |
      |            | vulnerable   | vulnerable   |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            | Releases up  | organization |
      |            | to and       | per the      |
      | 12.4MR     | including    | instructions |
      |            | 12.4(19)MR3  | in Obtaining |
      |            | are not      | Fixed        |
      |            | vulnerable.  | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      |            | contact your | contact your |
      |            | support      | support      |
      |            | organization | organization |
      |            | per the      | per the      |
      | 12.4MRA    | instructions | instructions |
      |            | in Obtaining | in Obtaining |
      |            | Fixed        | Fixed        |
      |            | Software     | Software     |
      |            | section of   | section of   |
      |            | this         | this         |
      |            | advisory.    | advisory.    |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      | 12.4MRB    | First fixed  | First fixed  |
      |            | in Release   | in Release   |
      |            | 15.0M        | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4SW     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            | 12.4(24)T7   |              |
      |            |              |              |
      |            | Releases up  | 12.4(15)T17  |
      | 12.4T      | to and       | 12.4(24)T7   |
      |            | including    |              |
      |            | 12.4(15)T17  |              |
      |            | are not      |              |
      |            | vulnerable.  |              |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XA     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XB     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 12.4T        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XC     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XD     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XE     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XF     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XG     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XJ     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XK     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4XL     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XM     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4XN     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4XP     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XQ     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            | Vulnerable;  |              |
      |            | First fixed  |              |
      |            | in Release   |              |
      |            | 12.4T        | Vulnerable;  |
      | 12.4XR     | Releases up  | First fixed  |
      |            | to and       | in Release   |
      |            | including    | 12.4T        |
      |            | 12.4(15)XR10 |              |
      |            | are not      |              |
      |            | vulnerable.  |              |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XT     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 12.4XV     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XW     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      | 12.4XY     | Not          | First fixed  |
      |            | vulnerable   | in Release   |
      |            |              | 15.0M        |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      | 12.4XZ     | First fixed  | First fixed  |
      |            | in Release   | in Release   |
      |            | 15.0M        | 15.0M        |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      | 12.4YA     | First fixed  | First fixed  |
      |            | in Release   | in Release   |
      |            | 15.0M        | 15.0M        |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      |            | contact your | contact your |
      |            | support      | support      |
      |            | organization | organization |
      |            | per the      | per the      |
      | 12.4YB     | instructions | instructions |
      |            | in Obtaining | in Obtaining |
      |            | Fixed        | Fixed        |
      |            | Software     | Software     |
      |            | section of   | section of   |
      |            | this         | this         |
      |            | advisory.    | advisory.    |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      |            | contact your | contact your |
      |            | support      | support      |
      |            | organization | organization |
      |            | per the      | per the      |
      | 12.4YD     | instructions | instructions |
      |            | in Obtaining | in Obtaining |
      |            | Fixed        | Fixed        |
      |            | Software     | Software     |
      |            | section of   | section of   |
      |            | this         | this         |
      |            | advisory.    | advisory.    |
      |------------+--------------+--------------|
      | 12.4YE     | 12.4(24)YE3d | 12.4(24)YE3d |
      |------------+--------------+--------------|
      | 12.4YG     | 12.4(24)YG4  | 12.4(24)YG4  |
      |------------+--------------+--------------|
      |            |              | First Fixed  |
      |            |              | Release for  |
      |            |              |     All      |
      |            |              |  Advisories  |
      |  Affected  | First Fixed  | in the March |
      | 15.0-Based |   Release    |  2012 Cisco  |
      |  Releases  |              | IOS Software |
      |            |              |   Security   |
      |            |              |   Advisory   |
      |            |              |   Bundled    |
      |            |              | Publication  |
      |------------+--------------+--------------|
      | 15.0M      | 15.0(1)M8    | 15.0(1)M8    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 15.0MR     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 15.0MRA    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | 15.0(1)S5    |
      |            |              | Cisco IOS XE |
      |            | Not          | devices:     |
      | 15.0S      | vulnerable   | Please see   |
      |            |              | Cisco IOS XE |
      |            |              | Software     |
      |            |              | Availability |
      |------------+--------------+--------------|
      | 15.0SA     | Not          | Not          |
      |            | vulnerable   | vulnerable   |
      |------------+--------------+--------------|
      | 15.0SE     | Not          | 15.0(1)SE1   |
      |            | vulnerable   |              |
      |------------+--------------+--------------|
      |            |              | 15.0(2)SG2   |
      |            |              | Cisco IOS XE |
      |            | Not          | devices:     |
      | 15.0SG     | vulnerable   | Please see   |
      |            |              | Cisco IOS XE |
      |            |              | Software     |
      |            |              | Availability |
      |------------+--------------+--------------|
      | 15.0SY     | Not          | 15.0(1)SY1   |
      |            | vulnerable   |              |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      | 15.0XA     | First fixed  | First fixed  |
      |            | in Release   | in Release   |
      |            | 15.1T        | 15.1T        |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | First fixed  |
      |            |              | in Release   |
      |            |              | 15.0SG Cisco |
      | 15.0XO     | Not          | IOS XE       |
      |            | vulnerable   | devices:     |
      |            |              | Please see   |
      |            |              | Cisco IOS XE |
      |            |              | Software     |
      |            |              | Availability |
      |------------+--------------+--------------|
      |            |              | First Fixed  |
      |            |              | Release for  |
      |            |              |     All      |
      |            |              |  Advisories  |
      |  Affected  | First Fixed  | in the March |
      | 15.1-Based |   Release    |  2012 Cisco  |
      |  Releases  |              | IOS Software |
      |            |              |   Security   |
      |            |              |   Advisory   |
      |            |              |   Bundled    |
      |            |              | Publication  |
      |------------+--------------+--------------|
      | 15.1EY     | Not          | 15.1(2)EY2   |
      |            | vulnerable   |              |
      |------------+--------------+--------------|
      | 15.1GC     | 15.1(2)GC2   | 15.1(2)GC2   |
      |------------+--------------+--------------|
      |            | 15.1(4)M3    | 15.1(4)M4;   |
      | 15.1M      |              | Available on |
      |            |              | 30-MAR-12    |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 15.1MR     | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      |            |              | 15.1(3)S2    |
      |            |              | Cisco IOS XE |
      |            | Not          | devices:     |
      | 15.1S      | vulnerable   | Please see   |
      |            |              | Cisco IOS XE |
      |            |              | Software     |
      |            |              | Availability |
      |------------+--------------+--------------|
      | 15.1SG     | Not          | Not          |
      |            | vulnerable   | vulnerable   |
      |------------+--------------+--------------|
      |            |              | Vulnerable;  |
      |            |              | contact your |
      |            |              | support      |
      |            |              | organization |
      |            |              | per the      |
      | 15.1SNG    | Not          | instructions |
      |            | vulnerable   | in Obtaining |
      |            |              | Fixed        |
      |            |              | Software     |
      |            |              | section of   |
      |            |              | this         |
      |            |              | advisory.    |
      |------------+--------------+--------------|
      | 15.1SNH    | Not          | Not          |
      |            | vulnerable   | vulnerable   |
      |------------+--------------+--------------|
      | 15.1T      | 15.1(3)T3    | 15.1(3)T3    |
      |------------+--------------+--------------|
      |            | Vulnerable;  | Vulnerable;  |
      | 15.1XB     | First fixed  | First fixed  |
      |            | in Release   | in Release   |
      |            | 15.1T        | 15.1T        |
      |------------+--------------+--------------|
      |            |              | First Fixed  |
      |            |              | Release for  |
      |            |              |     All      |
      |            |              |  Advisories  |
      |  Affected  | First Fixed  | in the March |
      | 15.2-Based |   Release    |  2012 Cisco  |
      |  Releases  |              | IOS Software |
      |            |              |   Security   |
      |            |              |   Advisory   |
      |            |              |   Bundled    |
      |            |              | Publication  |
      |------------+--------------+--------------|
      | 15.2GC     | 15.2(1)GC2   | 15.2(1)GC2   |
      |------------+--------------+--------------|
      |            |              | 15.2(1)S1    |
      |            |              | Cisco IOS XE |
      |            |              | devices:     |
      | 15.2S      | Not          | Please see   |
      |            | vulnerable   | Cisco IOS XE |
      |            |              | Software     |
      |            |              | Availability |
      |            |              |              |
      |------------+--------------+--------------|
      |            |              | 15.2(1)T2    |
      |            | 15.2(1)T2    | 15.2(2)T1    |
      | 15.2T      | 15.2(2)T     | 15.2(3)T;    |
      |            | 15.2(2)T1    | Available on |
      |            |              | 30-MAR-12    |
      +------------------------------------------+
      
      * Cisco Catalyst 3550 Series Switches support the Internet Key
      Exchange (IKE) feature and are vulnerable to Cisco bug ID CSCts38429
      when the devices are running Layer 3 images; however, this product
      reached the End of Software Maintenance milestone.  Cisco 3550 Series
      SMI Switches that are running Layer 2 images do not support IKE and
      are not vulnerable.  No other Cisco devices that run 12.2SE-based
      software are vulnerable.
      
      Cisco IOS XE Software
      +--------------------
      
      Cisco IOS XE Software is not affected by the vulnerabilities that are
      disclosed in this document. 
      
      For a mapping of Cisco IOS XE Software releases to Cisco IOS Software
      releases, refer to Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S
      Release Notes, and Cisco IOS XE 3SG Release Notes.
      
      Cisco IOS XR Software
      +--------------------
      
      Cisco IOS XR Software is not affected by any of the vulnerabilities
      disclosed in the March 2012 Cisco IOS Software Security Advisory
      Bundled Publication.
      
      
      
      Workarounds
      ===========
      
      There are no workarounds that mitigate the vulnerabilities described
      in this advisory.
      
      Obtaining Fixed Software
      ========================
      
      Cisco has released free software updates that address the
      vulnerabilities described in this advisory. Prior to deploying
      software, customers are advised to consult their maintenance
      providers or check the software for feature set compatibility and
      known issues that are specific to their environments.
      
      Customers may only install and expect support for feature sets they
      have purchased. By installing, downloading, accessing, or otherwise
      using such software upgrades, customers agree to follow the terms of
      the Cisco software license at:
      http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
      or as set forth 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, upgrades should be
      obtained through the Software Center on Cisco.com at:
      http://www.cisco.com
      
      Customers Using Third-Party Support Organizations
      +------------------------------------------------
      
      Customers with Cisco products that 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 organization for assistance with the appropriate
      course of action.
      
      The effectiveness of any workaround or fix depends on specific
      customer situations, such as product mix, network topology, traffic
      behavior, and organizational mission. Because of the variety of
      affected products and releases, customers should consult their
      service providers or support organizations to ensure that any applied
      workaround or fix is the most appropriate in the intended network
      before it is deployed.
      
      Customers Without Service Contracts
      +----------------------------------
      
      Customers who purchase directly from Cisco but do not hold a Cisco
      service contract and customers who make purchases through third-party
      vendors but are unsuccessful in obtaining fixed software through
      their point of sale should obtain upgrades by contacting the Cisco
      Technical Assistance Center (TAC):
      
        * +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 the product serial number available and be
      prepared to provide the URL of this advisory as evidence of
      entitlement to a free upgrade. Customers without service contracts
      should request free upgrades through the TAC.
      
      Refer to Cisco Worldwide Contacts at:
      http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html 
      for additional TAC contact information, including localized telephone 
      numbers, instructions, and e-mail addresses for support in various languages.
      
      Exploitation and Public Announcements
      =====================================
      
      The Cisco Product Security Incident Response Team (PSIRT) is not
      aware of any public announcements or malicious use of the
      vulnerabilities that are described in this advisory. 
      
      These vulnerabilities were discovered by Cisco during normal internal
      security testing.
      
      Status of This Notice: Final
      
      THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
      KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
      MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
      INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
      AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
      DOCUMENT AT ANY TIME.
      
      A stand-alone copy or Paraphrase of the text of this document that
      omits the distribution URL in the following section is an
      uncontrolled copy, and may lack important information or contain
      factual errors.
      
      
      Distribution
      ============
      
      This advisory is posted on Cisco Security Intelligence Operations at
      the following link:
      
      http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-zbfw
      
      Additionally, a text version of this advisory is clear signed with
      the Cisco PSIRT PGP key and circulated among the following e-mail
      addresses:
      
        * 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
      
      Future updates of this advisory, if any, will reside on Cisco.com but
      may not be announced on mailing lists. Users can monitor this
      advisory's URL for any updates. 
      
      
      Revision History
      ================
      
      +---------------------------------------+
      | Revision |               | Initial    |
      | 1.0      | 2012-March-28 | public     |
      |          |               | release    |
      +---------------------------------------+
      
      Cisco Security Procedures
      =========================
      
      Complete information about reporting security vulnerabilities in
      Cisco products, obtaining assistance with security incidents, and
      registering to receive security information from Cisco is available
      on Cisco.com at:
      http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
      This web page includes instructions for press inquiries regarding Cisco 
      Security Advisories.
      
      All Cisco Security Advisories are available at:
      http://www.cisco.com/go/psirt
      
      
      +--------------------------------------------------------------------
      Copyright 2010-2012 Cisco Systems, Inc. All rights reserved.
      +--------------------------------------------------------------------
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