Summary

• The H.323 implementation in Cisco IOS^® Software contains two vulnerabilities that may be exploited remotely to cause a denial of service (DoS) condition on a device that is running a vulnerable version of Cisco IOS Software.

  Cisco has released software updates that address these vulnerabilities. There are no workarounds to mitigate these vulnerabilities other than disabling H.323 on the vulnerable device.

  This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-h323.

  Note: The September 22, 2010, Cisco IOS Software Security Advisory bundled publication includes six Cisco Security Advisories. Five of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses vulnerabilities in Cisco Unified Communications Manager. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory. The table at the following URL lists releases that correct all Cisco IOS Software vulnerabilities that have been published on September 22, 2010, or earlier:

  http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a315.shtml

  Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at the following link:

  http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep10.html

Affected Products

• These vulnerabilities only affect devices that are running Cisco IOS Software with H.323 voice services enabled.

  Vulnerable Products

  Cisco devices that are running affected Cisco IOS Software versions that are configured to process H.323 messages are affected by these vulnerabilities. H.323 is not enabled by default.

  To determine if the Cisco IOS Software device is running H.323 services, issue the show process cpu | include H323 command, as shown in this example:

  Router# show process cpu | include H323
   249       16000           3       5333  0.00%  0.00%  0.00%   0 CCH323_CT
   250           0           1          0  0.00%  0.00%  0.00%   0 CCH323_DNS
  Router# 

  In the previous example the processes CCH323_CT and CCH323_DNS are running on the device; therefore, the device is listening to H.323 messages. The device is vulnerable if any of these processes (or similar) are active.

  Note: Creating a dial peer by issuing the dial-peer voice command will start the H.323 processes, which causes the Cisco IOS device to process H.323 messages.

  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 12.3(26) with an installed image name of C2500-IS-L:

  Router# show version
  Cisco Internetwork Operating System Software
  IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)
  Technical Support: http://www.cisco.com/techsupport
  Copyright (c) 1986-2008 by cisco Systems, Inc.
  Compiled Mon 17-Mar-08 14:39 by dchih
  
  
  !--- output truncated
  
  

  The following example identifies a Cisco product that is running Cisco IOS Software Release 12.4(20)T with an installed image name of C1841-ADVENTERPRISEK9-M:

  Router# show version
  Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T,
      RELEASE SOFTWARE (fc3)
  Technical Support: http://www.cisco.com/techsupport
  Copyright (c) 1986-2008 by Cisco Systems, Inc.
  Compiled Thu 10-Jul-08 20:25 by prod_rel_team
  
  
  !--- output truncated
  
  

  Additional information about Cisco IOS Software release naming conventions is available in "White Paper: Cisco IOS Reference Guide" at the following link: http://www.cisco.com/web/about/security/intelligence/ios-ref.html

  Products Confirmed Not Vulnerable

  Cisco IOS XR Software is not affected by these vulnerabilities.

  No other Cisco products are currently known to be affected by these vulnerabilities.

Details

• H.323 is the International Telecommunication Union (ITU) standard for real-time multimedia communications and conferencing over packet-based (IP) networks. A subset of the H.323 standard is H.225.0, a standard that is used for call signaling protocols and media stream packetization over IP networks.

  The H.323 implementation in Cisco IOS Software contains two DoS vulnerabilities. An attacker can exploit these vulnerabilities remotely by sending crafted H.323 packets to an affected device that is running Cisco IOS Software. A TCP three-way handshake is required to exploit these vulnerabilities.

  These vulnerabilities are documented in Cisco Bug IDs CSCtc73759 (registered customers only) and CSCtd33567 (registered customers only), and have been assigned Common Vulnerabilities and Exposures (CVE) IDs CVE-2010-2828 and CVE-2010-2829, respectively.

Workarounds

• There are no workarounds to mitigate these vulnerabilities apart from disabling H.323 if the Cisco IOS device does not require it. Applying access lists on interfaces that should not accept H.323 traffic and placing firewalls in strategic locations may greatly reduce exposure until an upgrade can be performed.

  Cisco provides Solution Reference Network Design (SRND) guides to help design and deploy networking solutions, which can be found at http://www.cisco.com/go/srnd.

  To disable all H.323 call processing, administrators can issue the call service stop forced command under the voice service voip mode, as shown in this example:

  voice service voip
   h323
    call service stop forced

  Note: The call service stop forced command disables all H.323 call processing.

  Additional mitigations that can be deployed on Cisco devices within the network are available in the companion document "Cisco Applied Mitigation Bulletin: Identifying and Mitigating Exploitation of the Multiple Vulnerabilities in Cisco Voice Products", which is available at the following location: https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20100922-voice

Fixed Software

• 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 following Cisco IOS Software table corresponds to a Cisco IOS Software train. If a particular train is vulnerable, the earliest releases that contain the fix are listed in the First Fixed Release For This Advisory column. The First Fixed Release for All Advisories in the September 2010 Bundle Publication column lists the earliest possible releases that correct all the published vulnerabilities in the Cisco IOS Software Security Advisory bundled publication. Cisco recommends upgrading to the latest available release, where possible.

  Major Release	Availability of Repaired Releases
  Affected 12.0-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  There are no affected 12.0-based releases
  Affected 12.1-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  12.1	Not Vulnerable	Vulnerable; first fixed in 12.4T Releases up to and including 12.1(4b) are not vulnerable.
  12.1AA	Not Vulnerable	Not Vulnerable
  12.1AX	Not Vulnerable	Not Vulnerable
  12.1AY	Not Vulnerable	Not Vulnerable
  12.1AZ	Not Vulnerable	Not Vulnerable
  12.1CX	Not Vulnerable	Not Vulnerable
  12.1DA	Not Vulnerable	Not Vulnerable
  12.1DB	Not Vulnerable	Not Vulnerable
  12.1DC	Not Vulnerable	Not Vulnerable
  12.1E	Not Vulnerable	Not Vulnerable
  12.1EA	Not Vulnerable	Not Vulnerable
  12.1EB	Not Vulnerable	Not Vulnerable
  12.1EC	Not Vulnerable	Not Vulnerable
  12.1EO	Not Vulnerable	Not Vulnerable
  12.1EU	Not Vulnerable	Not Vulnerable
  12.1EV	Not Vulnerable	Not Vulnerable
  12.1EW	Not Vulnerable	Not Vulnerable
  12.1EX	Not Vulnerable	Not Vulnerable
  12.1EY	Not Vulnerable	Not Vulnerable
  12.1EZ	Not Vulnerable	Not Vulnerable
  12.1GA	Not Vulnerable	Not Vulnerable
  12.1GB	Not Vulnerable	Not Vulnerable
  12.1T	Vulnerable; first fixed in 12.4 Releases up to and including 12.1(3a)T8 are not vulnerable.	Vulnerable; first fixed in 12.4T Releases up to and including 12.1(3a)T8 are not vulnerable.
  12.1XA	Not Vulnerable	Not Vulnerable
  12.1XB	Not Vulnerable	Not Vulnerable
  12.1XC	Not Vulnerable	Not Vulnerable
  12.1XD	Not Vulnerable	Not Vulnerable
  12.1XE	Not Vulnerable	Not Vulnerable
  12.1XF	Not Vulnerable	Not Vulnerable
  12.1XG	Not Vulnerable	Not Vulnerable
  12.1XH	Not Vulnerable	Not Vulnerable
  12.1XI	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XJ	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XL	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XM	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XP	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XQ	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XR	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XS	Vulnerable; first fixed in 12.4 Releases up to and including 12.1(3)XS are not vulnerable.	Vulnerable; first fixed in 12.4T Releases up to and including 12.1(3)XS are not vulnerable.
  12.1XT	Vulnerable; first fixed in 12.4 Releases up to and including 12.1(2)XT2 are not vulnerable.	Vulnerable; first fixed in 12.4T Releases up to and including 12.1(2)XT2 are not vulnerable.
  12.1XU	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XV	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1XW	Not Vulnerable	Not Vulnerable
  12.1XX	Not Vulnerable	Not Vulnerable
  12.1XY	Vulnerable; first fixed in 12.4 Releases up to and including 12.1(4)XY are not vulnerable.	Vulnerable; first fixed in 12.4T Releases up to and including 12.1(4)XY are not vulnerable.
  12.1XZ	Not Vulnerable	Not Vulnerable
  12.1YA	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1YB	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1YC	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1YD	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1YE	Releases prior to 12.1(5)YE6 are vulnerable, release 12.1(5)YE6 and later are not vulnerable; first fixed in 12.4	Releases prior to 12.1(5)YE6 are vulnerable, release 12.1(5)YE6 and later are not vulnerable; first fixed in 12.4T
  12.1YF	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1YH	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.1YI	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.1YJ	Not Vulnerable	Not Vulnerable
  Affected 12.2-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  12.2	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2B	Vulnerable; first fixed in 12.4 Releases up to and including 12.2(2)B7 are not vulnerable.	Vulnerable; first fixed in 12.4T Releases up to and including 12.2(2)B7 are not vulnerable.
  12.2BC	Not Vulnerable	Not Vulnerable
  12.2BW	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2BX	Vulnerable; first fixed in 12.2SB Releases up to and including 12.2(15)BX are not vulnerable.	Vulnerable; first fixed in 12.2SB Releases up to and including 12.2(15)BX are not vulnerable.
  12.2BY	Vulnerable; first fixed in 12.4 Releases up to and including 12.2(2)BY3 are not vulnerable.	Vulnerable; first fixed in 12.4T Releases up to and including 12.2(2)BY3 are not vulnerable.
  12.2BZ	Not Vulnerable	Not Vulnerable
  12.2CX	Not Vulnerable	Not Vulnerable
  12.2CY	Not Vulnerable	Not Vulnerable
  12.2CZ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2DA	Not Vulnerable	Not Vulnerable
  12.2DD	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2DX	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2EW	Not Vulnerable	Not Vulnerable
  12.2EWA	Not Vulnerable	Not Vulnerable
  12.2EX	Vulnerable; migrate to any release in 12.2SE	Not Vulnerable
  12.2EY	Not Vulnerable	Not Vulnerable
  12.2EZ	Not Vulnerable	Not Vulnerable
  12.2FX	Not Vulnerable	Not Vulnerable
  12.2FY	Not Vulnerable	Not Vulnerable
  12.2FZ	Not Vulnerable	Not Vulnerable
  12.2IRA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRD	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRE	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXD	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXE	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXF	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXG	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXH	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2JA	Not Vulnerable	Not Vulnerable
  12.2JK	Not Vulnerable	Not Vulnerable
  12.2MB	Not Vulnerable	Not Vulnerable
  12.2MC	Releases up to and including 12.2(15)MC1 are not vulnerable. Releases 12.2(15)MC2b and later are not vulnerable; first fixed in 12.4	Releases up to and including 12.2(15)MC1 are not vulnerable. Releases 12.2(15)MC2b and later are not vulnerable; first fixed in 12.4T
  12.2MRA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2MRB	Not Vulnerable	12.2(33)MRB2
  12.2S	Releases prior to 12.2(30)S are vulnerable, release 12.2(30)S and later are not vulnerable	Releases prior to 12.2(30)S are vulnerable, release 12.2(30)S and later are not vulnerable
  12.2SB	12.2(31)SB19 Releases prior to 12.2(33)SB5 are vulnerable, release 12.2(33)SB5 and later are not vulnerable	12.2(31)SB19 Releases prior to 12.2(33)SB5 are vulnerable, release 12.2(33)SB5 and later are not vulnerable
  12.2SBC	Vulnerable; first fixed in 12.2SB	Vulnerable; first fixed in 12.2SB
  12.2SCA	Vulnerable; first fixed in 12.2SCB	Vulnerable; first fixed in 12.2SCB
  12.2SCB	12.2(33)SCB10 12.2(33)SCB9 12.2(33)SCB8	12.2(33)SCB9
  12.2SCC	12.2(33)SCC5 12.2(33)SCC4	12.2(33)SCC5
  12.2SCD	12.2(33)SCD3 12.2(33)SCD4	12.2(33)SCD3
  12.2SE	Not Vulnerable	Not Vulnerable
  12.2SEA	Not Vulnerable	Not Vulnerable
  12.2SEB	Not Vulnerable	Not Vulnerable
  12.2SEC	Not Vulnerable	Not Vulnerable
  12.2SED	Not Vulnerable	Not Vulnerable
  12.2SEE	Not Vulnerable	Not Vulnerable
  12.2SEF	Not Vulnerable	Not Vulnerable
  12.2SEG	Not Vulnerable	Not Vulnerable
  12.2SG	Releases prior to 12.2(40)SG are vulnerable, release 12.2(40)SG and later are not vulnerable; migrate to any release in 12.2SGA	Releases prior to 12.2(40)SG are vulnerable, release 12.2(40)SG and later are not vulnerable; migrate to any release in 12.2SGA
  12.2SGA	Not Vulnerable	Not Vulnerable
  12.2SL	Not Vulnerable	Not Vulnerable
  12.2SM	Not Vulnerable	Not Vulnerable
  12.2SO	Not Vulnerable	Not Vulnerable
  12.2SQ	Not Vulnerable	Not Vulnerable
  12.2SRA	Releases prior to 12.2(33)SRA6 are vulnerable, release 12.2(33)SRA6 and later are not vulnerable	Releases prior to 12.2(33)SRA6 are vulnerable, release 12.2(33)SRA6 and later are not vulnerable
  12.2SRB	Releases prior to 12.2(33)SRB1 are vulnerable, release 12.2(33)SRB1 and later are not vulnerable	Releases prior to 12.2(33)SRB1 are vulnerable, release 12.2(33)SRB1 and later are not vulnerable
  12.2SRC	Vulnerable; first fixed in 12.2SRE	Not Vulnerable
  12.2SRD	Vulnerable; first fixed in 12.2SRE	Not Vulnerable
  12.2SRE	12.2(33)SRE1	12.2(33)SRE1
  12.2STE	Not Vulnerable	Not Vulnerable
  12.2SU	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2SV	Releases prior to 12.2(29b)SV1 are vulnerable, release 12.2(29b)SV1 and later are not vulnerable; migrate to any release in 12.2SVD	Releases prior to 12.2(29b)SV1 are vulnerable, release 12.2(29b)SV1 and later are not vulnerable; migrate to any release in 12.2SVD
  12.2SVA	Not Vulnerable	Not Vulnerable
  12.2SVC	Not Vulnerable	Not Vulnerable
  12.2SVD	Not Vulnerable	Not Vulnerable
  12.2SVE	Not Vulnerable	Not Vulnerable
  12.2SW	Releases up to and including 12.2(21)SW1 are not vulnerable. Releases 12.2(25)SW12 and later are not vulnerable; first fixed in 12.4T	Releases up to and including 12.2(21)SW1 are not vulnerable. Releases 12.2(25)SW12 and later are not vulnerable; first fixed in 12.4T
  12.2SX	Not Vulnerable	Releases up to and including 12.2(14)SX2 are not vulnerable.
  12.2SXA	Releases prior to 12.2(17b)SXA2 are vulnerable, release 12.2(17b)SXA2 and later are not vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXB	Releases prior to 12.2(17d)SXB7 are vulnerable, release 12.2(17d)SXB7 and later are not vulnerable; migrate to any release in 12.2SXE	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXD	Releases prior to 12.2(18)SXD2 are vulnerable, release 12.2(18)SXD2 and later are not vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXE	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXF	Only 12.2(18)SXF7 and 12.2(18)SXF8 are vulnerable	Releases prior to 12.2(18)SXF11 are vulnerable, release 12.2(18)SXF11 and later are not vulnerable
  12.2SXH	Not Vulnerable	Not Vulnerable
  12.2SXI	Not Vulnerable	Not Vulnerable
  12.2SY	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Not Vulnerable
  12.2SZ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2T	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2TPC	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2XA	Vulnerable; first fixed in 12.4 Releases up to and including 12.2(1)XA are not vulnerable.	Vulnerable; first fixed in 12.4T
  12.2XB	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XC	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XD	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XE	Not Vulnerable	Not Vulnerable
  12.2XF	Not Vulnerable	Not Vulnerable
  12.2XG	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XH	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XI	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XJ	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XK	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XL	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XM	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XN	Releases prior to 12.2(33)XN1 are vulnerable, release 12.2(33)XN1 and later are not vulnerable; first fixed in 12.2SB	Vulnerable; first fixed in 12.2SB
  12.2XNA	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNB	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNC	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XND	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNE	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNF	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XO	Not Vulnerable	Not Vulnerable
  12.2XQ	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XR	Not Vulnerable	Not Vulnerable
  12.2XS	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XT	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XU	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XV	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2XW	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2YA	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2YB	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YC	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YE	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YF	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YG	Not Vulnerable	Not Vulnerable
  12.2YH	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YJ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YK	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YL	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YM	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2YN	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YO	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Not Vulnerable
  12.2YP	Not Vulnerable	Not Vulnerable
  12.2YQ	Not Vulnerable	Not Vulnerable
  12.2YR	Not Vulnerable	Not Vulnerable
  12.2YS	Not Vulnerable	Not Vulnerable
  12.2YT	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YU	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YV	Releases prior to 12.2(11)YV1 are vulnerable, release 12.2(11)YV1 and later are not vulnerable	Releases prior to 12.2(11)YV1 are vulnerable, release 12.2(11)YV1 and later are not vulnerable
  12.2YW	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YX	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YY	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YZ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZA	Not Vulnerable	Not Vulnerable
  12.2ZB	Releases up to and including 12.2(8)ZB are not vulnerable.	Releases up to and including 12.2(8)ZB are not vulnerable.
  12.2ZC	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZE	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2ZF	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2ZG	Not Vulnerable	Not Vulnerable
  12.2ZH	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.2ZJ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZL	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZP	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZU	Vulnerable; migrate to any release in 12.2SXH Releases up to and including 12.2(18)ZU are not vulnerable.	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZX	Not Vulnerable	Not Vulnerable
  12.2ZY	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZYA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  Affected 12.3-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  12.3	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3B	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3BC	Not Vulnerable	Not Vulnerable
  12.3BW	Not Vulnerable	Not Vulnerable
  12.3EU	Not Vulnerable	Not Vulnerable
  12.3JA	Not Vulnerable	Not Vulnerable
  12.3JEA	Not Vulnerable	Not Vulnerable
  12.3JEB	Not Vulnerable	Not Vulnerable
  12.3JEC	Not Vulnerable	Not Vulnerable
  12.3JED	Not Vulnerable	Not Vulnerable
  12.3JK	Releases up to and including 12.3(2)JK3 are not vulnerable. Releases 12.3(8)JK1 and later are not vulnerable; first fixed in 12.4	Releases up to and including 12.3(2)JK3 are not vulnerable. Releases 12.3(8)JK1 and later are not vulnerable; first fixed in 12.4T
  12.3JL	Not Vulnerable	Not Vulnerable
  12.3JX	Not Vulnerable	Not Vulnerable
  12.3T	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3TPC	Releases up to and including 12.3(4)TPC11a are not vulnerable.	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3VA	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3XA	Releases prior to 12.3(2)XA7 are vulnerable, release 12.3(2)XA7 and later are not vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XB	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3XC	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XD	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XE	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XF	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3XG	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XI	Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable; first fixed in 12.2SB	Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable; first fixed in 12.2SB
  12.3XJ	Vulnerable; first fixed in 12.3YX	Vulnerable; first fixed in 12.4XR
  12.3XK	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XL	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3XQ	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XR	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XS	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XU	Vulnerable; first fixed in 12.4T Releases up to and including 12.3(8)XU1 are not vulnerable.	Vulnerable; first fixed in 12.4T
  12.3XW	Vulnerable; first fixed in 12.3YX	Vulnerable; first fixed in 12.4T
  12.3XX	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XY	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3XZ	Vulnerable; first fixed in 12.4	Vulnerable; first fixed in 12.4T
  12.3YA	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YD	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YF	Vulnerable; first fixed in 12.3YX	Vulnerable; first fixed in 12.4XR
  12.3YG	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YH	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YI	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YJ	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YK	Releases prior to 12.3(11)YK3 are vulnerable, release 12.3(11)YK3 and later are not vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YM	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YQ	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YS	Vulnerable; first fixed in 12.4T Releases up to and including 12.3(11)YS1 are not vulnerable.	Vulnerable; first fixed in 12.4T
  12.3YT	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YU	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YX	12.3(14)YX17	Vulnerable; first fixed in 12.4XR
  12.3YZ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3ZA	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  Affected 12.4-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  12.4	12.4(25d)	12.4(25d)
  12.4GC	12.4(24)GC2	12.4(24)GC2
  12.4JA	Not Vulnerable	Not Vulnerable
  12.4JDA	Not Vulnerable	Not Vulnerable
  12.4JDC	Not Vulnerable	Not Vulnerable
  12.4JDD	Not Vulnerable	Not Vulnerable
  12.4JHA	Not Vulnerable	Not Vulnerable
  12.4JHB	Not Vulnerable	Not Vulnerable
  12.4JK	Not Vulnerable	Not Vulnerable
  12.4JL	Not Vulnerable	Not Vulnerable
  12.4JMA	Not Vulnerable	Not Vulnerable
  12.4JMB	Not Vulnerable	Not Vulnerable
  12.4JX	Not Vulnerable	Not Vulnerable
  12.4JY	Not Vulnerable	Not Vulnerable
  12.4MD	Not Vulnerable	12.4(24)MD2
  12.4MDA	12.4(22)MDA4	12.4(22)MDA4
  12.4MR	Vulnerable; first fixed in 12.4MRA	Vulnerable; first fixed in 12.4MRA
  12.4MRA	12.4(20)MRA1	12.4(20)MRA1
  12.4SW	Releases prior to 12.4(15)SW6 are vulnerable, release 12.4(15)SW6 and later are not vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4T	12.4(15)T14 12.4(20)T6 12.4(24)T4	12.4(15)T14 12.4(20)T6 12.4(24)T4
  12.4XA	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XB	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XC	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XD	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XE	Releases prior to 12.4(6)XE5 are vulnerable, release 12.4(6)XE5 and later are not vulnerable; first fixed in 12.4T	Releases prior to 12.4(6)XE5 are vulnerable, release 12.4(6)XE5 and later are not vulnerable; first fixed in 12.4T
  12.4XF	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XG	Releases prior to 12.4(9)XG5 are vulnerable, release 12.4(9)XG5 and later are not vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XJ	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XK	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XL	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4XM	Releases prior to 12.4(15)XM3 are vulnerable, release 12.4(15)XM3 and later are not vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XN	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4XP	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4XQ	Releases up to and including 12.4(15)XQ are not vulnerable. Releases 12.4(15)XQ6 and later are not vulnerable; first fixed in 12.4T	12.4(15)XQ6; Available on 22-SEP-10
  12.4XR	Not Vulnerable	12.4(15)XR9 12.4(22)XR7
  12.4XT	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XV	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4XW	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XY	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XZ	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4YA	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4YB	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4YD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4YE	Releases prior to 12.4(24)YE1 are vulnerable, release 12.4(24)YE1 and later are not vulnerable; first fixed in 12.4T	12.4(24)YE1
  12.4YG	12.4(24)YG3	12.4(24)YG3
  Affected 15.0-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  15.0M	15.0(1)M3	15.0(1)M3
  15.0S	Cisco 7600 and 10000 Series routers: Not Vulnerable Cisco ASR 1000 Series routes: Please see Cisco IOS-XE Software Availability	Cisco 7600 and 10000 Series routers: 15.0(1)S1 (available early October 2010) Cisco ASR 1000 Series routes: Please see Cisco IOS-XE Software Availability
  15.0XA	Vulnerable; first fixed in 15.1T	Vulnerable; first fixed in 15.1T
  15.0XO	Not Vulnerable	Not Vulnerable
  Affected 15.1-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  15.1T	15.1(1)T1 15.1(2)T0a	15.1(2)T1
  15.1XB	Vulnerable; first fixed in 15.1T	Vulnerable; first fixed in 15.1T

  Cisco IOS XE Software

  Cisco IOS XE Release	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  2.1.x	Not Vulnerable	Not Vulnerable
  2.2.x	Not Vulnerable	Not Vulnerable
  2.3.x	Not Vulnerable	Not Vulnerable
  2.4.x	Not Vulnerable	Not Vulnerable
  2.5.x	2.5.2	Vulnerable; migrate to 2.6.2 or later
  2.6.x	2.6.1	2.6.2
  3.1.xS	Not Vulnerable	Not Vulnerable

  For mapping of Cisco IOS XE to Cisco IOS releases, please refer to the Cisco IOS XE 2 and Cisco IOS XE 3S Release Notes.

Exploitation and Public Announcements

• The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities described in this advisory.

  The vulnerability tracked by CSCtd33567 was found during internal testing. The vulnerability tracked by CSCtc73759 was found during the resolution of a customer service request.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-h323

Revision History

• Version	Description	Section	Status	Date
  1.3	Updated the link to the bundle page and removed the link to the EOL SRND.	Summary, Workarounds	Final	2016-January-08
  1.2	Revised Software Versions and Fixes to indicate that 12.2SRE is first fixed in 12.2(33)SRE1, that 12.2SRD is vulnerable and first fixed in 12.2SRE, and that 12.2SRC is vulnerable and first fixed in 12.2SRE.		Final	2011-March-10
  1.1	Revised the Exploitation and Public Announcements section to indicate that one vulnerability was discovered during work on a customer service request.			2010-September-23
  1.0	Initial public release.			2010-September-22

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