[apops] Cisco Security Advisory: Multiple Cisco IOS Session Initiation P

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  • Subject: [apops] Cisco Security Advisory: Multiple Cisco IOS Session Initiation Protocol Denial of Service Vulnerabilities
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  • Date: Wed, 24 Sep 2008 17:50:00 +0200
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      Cisco Security Advisory: Multiple Cisco IOS Session Initiation
      Protocol Denial of Service Vulnerabilities
      
      Advisory ID: cisco-sa-20080924-sip
      
      http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml
      
      Revision 1.0
      
      For Public Release 2008 September 24 1600 UTC (GMT)
      
      - ---------------------------------------------------------------------
      
      Summary
      =======
      
      Multiple vulnerabilities exist in the Session Initiation Protocol
      (SIP) implementation in Cisco IOS that can be exploited remotely to
      trigger a memory leak or to cause a reload of the IOS device.
      
      Cisco has released free software updates that address these
      vulnerabilities. Fixed Cisco IOS software listed in the Software
      Versions and Fixes section contains fixes for all vulnerabilities
      addressed in this advisory.
      
      There are no workarounds available to mitigate the effects of any of
      the vulnerabilities apart from disabling the protocol or feature
      itself, if administrators do not require the Cisco IOS device to
      provide voice over IP services.
      
      This advisory is posted at 
      http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml
      
      Note:  The September 24, 2008 IOS Advisory bundled publication
      includes twelve Security Advisories. Eleven of the advisories address
      vulnerabilities in Cisco's IOS software, and one advisory addresses
      vulnerabilities in Cisco Unified Communications Manager. Each
      Advisory lists the releases that correct the vulnerability described
      in the Advisory. Please reference the following software table to
      find a release that fixes all published IOS software Advisories as of
      September 24th, 2008:
      
      http://www.cisco.com/warp/public/707/cisco-sa-20080924-bundle.shtml
      
      Individual publication links are listed below:
      
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-cucm.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml
        * http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml
      
      Affected Products
      =================
      
      These vulnerabilities only affect devices running Cisco IOS that have
      SIP voice services enabled.
      
      Vulnerable Products
      +------------------
      
      Cisco devices running affected Cisco IOS versions and that may
      process SIP messages are affected. The only requirement for these
      vulnerabilities is that the Cisco IOS device processes SIP messages
      as part of configured voice over IP (VoIP) functionality (this does
      not apply to processing of SIP messages as part of the NAT and
      firewall feature sets.) Recent versions of Cisco IOS do not process
      SIP messages by default, but creating a "dial peer" via the command
      dial-peer voice will start the SIP processes and cause Cisco IOS to
      start processing SIP messages. An example of an affected
      configuration is as follows:
      
          dial-peer voice <Voice dial-peer tag> voip
           ...
          !
      
      Note that older versions of Cisco IOS were affected by a bug that
      caused Cisco IOS to process SIP messages even without being
      configured for SIP operation. Please refer to 
      http://www.cisco.com/warp/public/707/cisco-sa-20070131-sip.shtml 
      for additional information on Cisco bug ID CSCsb25337.
      
      In addition to inspecting the Cisco IOS device configuration for a
      dial-peer command that causes the device to process SIP messages,
      administrators can also use some show commands to determine if the
      Cisco IOS device is running processes that handle SIP messages, or if
      the device is listening on the SIP ports.
      
      The command show processes | include SIP can be used to determine
      whether Cisco IOS is running the processes that handle SIP messages.
      In the following example, the presence of the processes
      CCSIP_UDP_SOCKET and CCSIP_TCP_SOCKET indicates that the Cisco IOS
      device is processing SIP messages:
      
          Router#show processes | include SIP
           147 Mwe 40F46DF4           12          2    600023468/24000  0 CCSIP_SPI_CONTRO
           148 Mwe 40F21244            0          1       0 5524/6000   0 CCSIP_DNS
           149 Mwe 40F48254            4          1    400023108/24000  0 CCSIP_UDP_SOCKET
           150 Mwe 40F48034            4          1    400023388/24000  0 CCSIP_TCP_SOCKET
      
      Different versions of Cisco IOS have different ways of verifying
      whether the Cisco IOS device is listening for SIP messages. The show
      ip sockets, show udp, show tcp brief all, and show control-plane host
      open-ports commands can be used to determine this, although not all
      of these commands work on all IOS releases. Since it is not practical
      in this document to provide a list of commands corresponding to the
      various releases, users should try the aforementioned commands to
      determine which ones work for their device. The following is one
      example of one command that shows a router listening on port 5060
      (the SIP port):
      
          router#show control-plane host open-ports
          Active internet connections (servers and established)
          Prot        Local Address      Foreign Address                  Service    State
          <output removed for brevity>
           tcp               *:5060                  *:0                      SIP   LISTEN
          <outoput removed for brevity>
           udp               *:5060                  *:0                      SIP   LISTEN
      
      In order to determine the software that runs on a Cisco IOS product,
      log in to the device and issue the show version command to display
      the system banner. Cisco IOS software identifies itself as
      "Internetwork Operating System Software" or simply "IOS." On the next
      line of output, the image name displays between parentheses, followed
      by "Version" and the Cisco IOS release name. Other Cisco devices do
      not have the show version command or give different output.
      
      The following example shows output from a device that runs an IOS
      image:
      
          router>show version
          Cisco IOS Software, 7200 Software (C7200-ADVSECURITYK9-M), Version 12.4(6)T2, RELEASE SOFTWARE (fc1)
          Technical Support: http://www.cisco.com/techsupport
          Copyright (c) 1986-2006 by Cisco Systems, Inc.
          Compiled Tue 16-May-06 16:09 by kellythw
          <more output removed for brevity>
      
      Additional information on the Cisco IOS release naming conventions
      can be found on the document entitled "White Paper: Cisco IOS
      Reference Guide", which is available at 
      http://www.cisco.com/warp/public/620/1.html
      
      Cisco Unified Communications Manager is also affected by some of
      these vulnerabilities, although they are tracked by different Cisco
      bug IDs. A companion security advisory for Cisco Unified
      Communications Manager is available at 
      http://www.cisco.com/warp/public/707/cisco-sa-20080924-cucm.shtml
      
      Products Confirmed Not Vulnerable
      +--------------------------------
      
      The SIP Application Layer Gateway (ALG), which is used by the IOS
      Network Address Translation (NAT) and firewall features of Cisco IOS,
      is not affected by these vulnerabilities.
      
      Cisco devices that are running Cisco IOS XR are not affected.
      
      With the exception of the Cisco Unified Communications Manager, no
      other Cisco products are currently known to be vulnerable to the
      issues described in this advisory.
      
      Details
      =======
      
      SIP is a popular signaling protocol 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 is flexible to accommodate for other applications that
      require call setup and termination. SIP call signaling can use UDP
      (port 5060), TCP (port 5060), or TLS (TCP port 5061) as the
      underlying transport protocol.
      
      Multiple denial of service vulnerabilities exist in the SIP
      implementation in Cisco IOS. In all cases vulnerabilities can be
      triggered by processing valid SIP messages.
      
      Memory Leak Vulnerability
      +------------------------
      
      CSCse56800 causes a memory leak in affected devices. The memory 
      leak is caused by the processing of a specific type of valid SIP 
      messages and may eventually disrupt the availability of all 
      voice services, even if the Cisco IOS device is still running. 
      This vulnerability has been assigned Common Vulnerabilities and
      Exposures (CVE) ID CVE-2008-3799.
      
      Device Reload Vulnerabilities
      +----------------------------
      
      The following vulnerabilities can lead to a reload of the Cisco IOS
      device while processing some specific and valid SIP messages:
      
        * CSCsg91306, assigned CVE ID CVE-2008-3800
        * CSCsl62609, assigned CVE ID CVE-2008-3801
        * CSCsk42759, assigned CVE ID CVE-2008-3802
      
      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
      
      CSCse56800 - SIP-3-BADPAIR register timer expiry causes slow memory
                   leak
      
      CVSS Base Score - 7.8
      
      	Access Vector		 - Network
      	Access Complexity	 - Low
      	Authentication		 - None
      	Confidentiality Impact	 - None
      	Integrity Impact	 - None
      	Availability Impact	 - Complete
      
      CVSS Temporal Score - 6.4
      
      	Exploitability		 - Functional
      	Remediation Level	 - Official-Fix
      	Report Confidence	 - Confirmed
      
      
      CSCsg91306 - processor pool memory corruption in CCSIP_SPI_CONTROL
      
      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
      
      
      CSCsk42759 - Voice Gateway reloads on receiving a valid SIP packet
      
      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
      
      
      CSCsl62609 - Router crash due to presence of valid SIP header
      
      CVSS Base Score - 7.8
      
      	Access Vector		 - Network
      	Access Complexity	 - Low
      	Authentication		 - None
      	Confidentiality Impact	 - None
      	Integrity Impact	 - None
      	Availability Impact	 - Complete
      
      CVSS Temporal Score - 6.4
      
      	Exploitability		 - Functional
      	Remediation Level	 - Official-Fix
      	Report Confidence	 - Confirmed
      
      Impact
      ======
      
      Successful exploitation of the vulnerabilities described in this
      document may result in a reload of the device. The issue could be
      repeatedly exploited to result in an extended Denial Of Service (DoS)
      condition.
      
      Software Versions and Fixes
      ===========================
      
      When considering software upgrades, also consult 
      http://www.cisco.com/go/psirt and any subsequent advisories to 
      determine exposure and a complete upgrade solution.
      
      In all cases, customers should exercise caution to be certain the
      devices to be upgraded contain sufficient memory and that current
      hardware and software configurations will continue to be supported
      properly by the new release. If the information is not clear, contact
      the Cisco Technical Assistance Center (TAC) or your contracted
      maintenance provider for assistance.
      
      Each row of the Cisco IOS software table (below) names a Cisco IOS
      release train. If a given release train is vulnerable, then the
      earliest possible releases that contain the fix (along with the
      anticipated date of availability for each, if applicable) are listed
      in the "First Fixed Release" column of the table. The "Recommended
      Release" column indicates the releases which have fixes for all the
      published vulnerabilities at the time of this Advisory. A device
      running a release in the given train that is earlier than the release
      in a specific column (less than the First Fixed Release) is known to
      be vulnerable. Cisco recommends upgrading to a release equal to or
      later than the release in the "Recommended Releases" column of the
      table.
      
      +-------------------------------------------------------------------+
      |   Major    |             Availability of Repaired Releases        |
      |  Release   |                                                      |
      |------------+------------------------------------------------------|
      |  Affected  |                                       | Recommended  |
      | 12.0-Based |          First Fixed Release          |   Release    |
      |  Releases  |                                       |              |
      |-------------------------------------------------------------------|
      | There are no affected 12.0 based releases                         |
      |-------------------------------------------------------------------|
      |  Affected  |                                       | Recommended  |
      | 12.1-Based |          First Fixed Release          |   Release    |
      |  Releases  |                                       |              |
      |-------------------------------------------------------------------|
      | There are no affected 12.1 based releases                         |
      |-------------------------------------------------------------------|
      |  Affected  |                                       | Recommended  |
      | 12.2-Based |          First Fixed Release          |   Release    |
      |  Releases  |                                       |              |
      |------------+---------------------------------------+--------------|
      | 12.2       | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2B      | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2BC     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2BW     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.2(33)SB2; |
      |            |                                       | Available on |
      |            |                                       | 26-SEP-08    |
      | 12.2BX     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(15)T7   |
      |            |                                       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2BY     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2BZ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2CX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2CY     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            | Vulnerable; migrate to any release in | 12.2(33)SB2; |
      | 12.2CZ     | 12.2S                                 | Available on |
      |            |                                       | 26-SEP-08    |
      |------------+---------------------------------------+--------------|
      | 12.2DA     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2DD     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2DX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2EW     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2EWA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2EX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2EY     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2EZ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2FX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2FY     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2FZ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IRB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IXA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IXB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IXC    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IXD    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IXE    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IXF    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2IXG    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2JA     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2JK     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2MB     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            | Releases prior to 12.2(15)MC2c are    | 12.4(15)T7   |
      | 12.2MC     | vulnerable, release 12.2(15)MC2c and  |              |
      |            | later are not vulnerable; first fixed | 12.4(18c)    |
      |            | in 12.4                               |              |
      |------------+---------------------------------------+--------------|
      | 12.2S      | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SB     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SBC    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SCA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SE     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SEA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SEB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SEC    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SED    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SEE    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SEF    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SEG    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SG     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SGA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SL     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SM     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SO     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SRA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SRB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SRC    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SU     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SV     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SVA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SVC    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SVD    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SW     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SXA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SXB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SXD    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SXE    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SXF    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SXH    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SY     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2SZ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2T      | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2TPC    | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2XA     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2XB     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2XC     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XD     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XE     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XF     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XG     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XH     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XI     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XJ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XK     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XL     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2XM     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2XN     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XNA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XNB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XO     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XQ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XR     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2XS     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2XT     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2XU     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2XV     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2XW     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2YA     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2YB     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YC     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YD     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YE     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YF     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YG     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YH     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YJ     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YK     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YL     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2YM     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2YN     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YO     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YP     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YQ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YR     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YS     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YT     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YU     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      |            | Releases prior to 12.2(11)YV1 are     |              |
      | 12.2YV     | vulnerable, release 12.2(11)YV1 and   |              |
      |            | later are not vulnerable;             |              |
      |------------+---------------------------------------+--------------|
      | 12.2YW     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2YY     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2YZ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZA     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZB     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZC     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZD     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2ZE     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2ZF     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2ZG     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.2ZH     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.2ZJ     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZL     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZP     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZU     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZY     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.2ZYA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |  Affected  |                                       | Recommended  |
      | 12.3-Based |          First Fixed Release          |   Release    |
      |  Releases  |                                       |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3       | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3B      | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.3BC     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3BW     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3EU     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3JA     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3JEA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3JEB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3JEC    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3JK     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3JL     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3JX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3T      | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.3TPC    | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.3VA     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      |            | Releases prior to 12.3(2)XA7 are      | 12.4(15)T7   |
      | 12.3XA     | vulnerable, release 12.3(2)XA7 and    |              |
      |            | later are not vulnerable; first fixed | 12.4(18c)    |
      |            | in 12.4                               |              |
      |------------+---------------------------------------+--------------|
      | 12.3XB     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XC     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XD     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XE     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.3XF     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XG     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            | Vulnerable; migrate to any release in | 12.2(33)SB2; |
      | 12.3XI     | 12.2SB                                | Available on |
      |            |                                       | 26-SEP-08    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.3(14)YX13 |
      | 12.3XJ     | Vulnerable; first fixed in 12.3YX     |              |
      |            |                                       | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XK     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XL     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XQ     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XR     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.3XS     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3XU     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.3(14)YX13 |
      | 12.3XW     | Vulnerable; first fixed in 12.3YX     |              |
      |            |                                       | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XX     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XY     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(15)T7   |
      | 12.3XZ     | Vulnerable; first fixed in 12.4       |              |
      |            |                                       | 12.4(18c)    |
      |------------+---------------------------------------+--------------|
      | 12.3YA     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3YD     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.3(14)YX13 |
      | 12.3YF     | Vulnerable; first fixed in 12.3YX     |              |
      |            |                                       | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.3YG     | 12.3(8)YG7; Available on 01-OCT-08    | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.3YH     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3YI     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.3YJ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            | Releases prior to 12.3(11)YK3 are     |              |
      | 12.3YK     | vulnerable, release 12.3(11)YK3 and   | 12.4(15)T7   |
      |            | later are not vulnerable; first fixed |              |
      |            | in 12.4T                              |              |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.3(14)     |
      | 12.3YM     | 12.3(14)YM13; Available on 30-SEP-08  | YM13;        |
      |            |                                       | Available on |
      |            |                                       | 30-SEP-08    |
      |------------+---------------------------------------+--------------|
      | 12.3YQ     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.3YS     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.3YT     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(2)XB10  |
      |            |                                       |              |
      | 12.3YU     | Vulnerable; first fixed in 12.4XB     | 12.4(9)XG3   |
      |            |                                       |              |
      |            |                                       | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.3YX     | 12.3(14)YX12                          | 12.3(14)YX13 |
      |------------+---------------------------------------+--------------|
      | 12.3YZ     | 12.3(11)YZ3                           |              |
      |------------+---------------------------------------+--------------|
      | 12.3ZA     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      |  Affected  |                                       | Recommended  |
      | 12.4-Based |          First Fixed Release          |   Release    |
      |  Releases  |                                       |              |
      |------------+---------------------------------------+--------------|
      |            | 12.4(13f)                             |              |
      |            |                                       |              |
      | 12.4       | 12.4(17b)                             | 12.4(18c)    |
      |            |                                       |              |
      |            | 12.4(18)                              |              |
      |------------+---------------------------------------+--------------|
      | 12.4JA     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4JK     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4JL     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4JMA    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4JMB    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4JMC    | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4JX     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4MD     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4MR     | 12.4(19)MR                            | 12.4(19)MR   |
      |------------+---------------------------------------+--------------|
      | 12.4SW     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      |            | 12.4(15)T4                            |              |
      |            |                                       |              |
      | 12.4T      | 12.4(20)T                             | 12.4(15)T7   |
      |            |                                       |              |
      |            | 12.4(6)T11                            |              |
      |------------+---------------------------------------+--------------|
      | 12.4XA     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.4XB     | 12.4(2)XB10                           | 12.4(2)XB10  |
      |------------+---------------------------------------+--------------|
      | 12.4XC     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      |            |                                       | 12.4(4)XD11; |
      | 12.4XD     | 12.4(4)XD11; Available on 26-SEP-08   | Available on |
      |            |                                       | 26-SEP-08    |
      |------------+---------------------------------------+--------------|
      | 12.4XE     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.4XF     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4XG     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4XJ     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.4XK     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4XL     | 12.4(15)XL2                           | 12.4(15)XL2  |
      |------------+---------------------------------------+--------------|
      | 12.4XM     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4XN     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4XP     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.4XQ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4XR     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4XT     | Vulnerable; first fixed in 12.4T      | 12.4(15)T7   |
      |------------+---------------------------------------+--------------|
      | 12.4XV     | Vulnerable; contact TAC               |              |
      |------------+---------------------------------------+--------------|
      | 12.4XW     | 12.4(11)XW7                           | 12.4(11)XW9  |
      |------------+---------------------------------------+--------------|
      | 12.4XY     | 12.4(15)XY3                           | 12.4(15)XY4  |
      |------------+---------------------------------------+--------------|
      | 12.4XZ     | Not Vulnerable                        |              |
      |------------+---------------------------------------+--------------|
      | 12.4YA     | Not Vulnerable                        |              |
      +-------------------------------------------------------------------+
      
      Workarounds
      ===========
      
      If the affected Cisco IOS device needs to provide voice over IP
      services and therefore SIP cannot be disabled then none of the listed
      vulnerabilities have workarounds. Users are advised to apply
      mitigation techniques to limit exposure to the listed
      vulnerabilities. Mitigation consists of only allowing legitimate
      devices to connect to the routers. To increase effectiveness, the
      mitigation must be coupled with anti-spoofing measures on the network
      edge. This action is required because SIP can use UDP as the
      transport protocol.
      
      Additional mitigations that can be deployed on Cisco devices within
      the network are available in the Cisco Applied Mitigation Bulletin
      companion document for this advisory, which is available at the
      following link: 
      http://www.cisco.com/warp/public/707/cisco-amb-20080924-sip.shtml
      
      Disable SIP Listening Ports
      +--------------------------
      
      For devices that do not require SIP to be enabled, the simplest and
      most effective workaround is to disable SIP processing on the device.
      Some versions of Cisco IOS allow administrators to accomplish this
      with the following commands:
      
          sip-ua
           no transport udp
           no transport tcp
      
      Warning:  When applying this workaround to devices processing
      MGCP or H.323 calls, the device will not allow you to stop SIP
      processing while active calls are being processed. Under these
      circumstances, this workaround should be implemented during a
      maintenance window when active calls can be briefly stopped.
      
      It is recommended that after applying this workaround, the show
      commands discussed in the Vulnerable Products section be used to
      confirm that the Cisco IOS device is no longer processing SIP
      messages.
      
      Control Plane Policing
      +---------------------
      
      For devices that need to offer SIP services it is possible to use
      Control Plane Policing (CoPP) to block SIP traffic to the device from
      untrusted sources. Cisco IOS software releases 12.0S, 12.2SX, 12.2S,
      12.3T, 12.4, and 12.4T support the CoPP feature. CoPP may be
      configured on a device to protect the management and control planes
      to minimize the risk and effectiveness of direct infrastructure
      attacks by explicitly permitting only authorized traffic sent to
      infrastructure devices in accordance with existing security policies
      and configurations. The following example can be adapted to your
      network:
      
      
          !-- The 192.168.1.0/24 network and the 172.16.1.1 host are trusted.
          !-- Everything else is not trusted. The following access list is used
          !-- to determine what traffic needs to be dropped by a control plane
          !-- policy (the CoPP feature.) If the access list matches (permit)
          !-- then traffic will be dropped and if the access list does not
          !-- match (deny) then traffic will be processed by the router.
      
          access-list 100 deny udp 192.168.1.0 0.0.0.255 any eq 5060
          access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 5060
          access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 5061
          access-list 100 deny udp host 172.16.1.1 any eq 5060
          access-list 100 deny tcp host 172.16.1.1 any eq 5060
          access-list 100 deny tcp host 172.16.1.1 any eq 5061
          access-list 100 permit udp any any eq 5060
          access-list 100 permit tcp any any eq 5060
          access-list 100 permit tcp any any eq 5061
      
      
          !-- Permit (Police or Drop)/Deny (Allow) all other Layer3 and Layer4
          !-- traffic in accordance with existing security policies and
          !-- configurations for traffic that is authorized to be sent
          !-- to infrastructure devices.
      
      
      
          !-- Create a Class-Map for traffic to be policed by
          !-- the CoPP feature.
      
          class-map match-all drop-sip-class
            match access-group 100
      
      
          !-- Create a Policy-Map that will be applied to the
          !-- Control-Plane of the device.
      
          policy-map drop-sip-traffic
           class drop-sip-class
            drop
      
      
          !-- Apply the Policy-Map to the Control-Plane of the
          !-- device.
      
          control-plane
           service-policy input drop-sip-traffic
      
      Warning:  Because SIP can utilize UDP as a transport protocol,
      it is possible to easily spoof the sender's IP address, which may
      defeat ACLs that permit communication to these ports from trusted
      IP addresses.
      
      In the above CoPP example, the access control list entries (ACEs)
      that match the potential exploit packets with the "permit" action
      result in these packets being discarded by the policy-map "drop"
      function, while packets that match the "deny" action (not shown) are
      not affected by the policy-map drop function. Additional information
      on the configuration and use of the CoPP feature can be found at
      http://www.cisco.com/en/US/products/ps6642/products_white_paper0900aecd804fa16a.shtml
      and http://www.cisco.com/en/US/products/sw/iosswrel/ps1838/products_feature_guide09186a008052446b.html
      
      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/products/prod_warranties_item09186a008088e31f.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/warp/public/687/Directory/DirTAC.shtml
      for additional TAC contact information, including localized telephone
      numbers, and instructions and e-mail addresses for use in various
      languages.
      
      Exploitation and Public Announcements
      =====================================
      
      The Cisco PSIRT is not aware of any public announcements or malicious
      use of the vulnerability described in this advisory.
      
      These vulnerabilities were discovered by Cisco internal testing and
      during handling of customer service requests.
      
      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-20080924-sip.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 |                   | Initial |
      | 1.0      | 2008-September-24 | 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
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