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Cisco Security Advisory: Cisco IOS Software Crafted TCP Packet Denial of Service Vulnerability

Advisory ID: cisco-sa-20100324-tcp

Revision 1.0

For Public Release 2010 March 24 1600 UTC (GMT)

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Summary =======

Cisco IOS Software is affected by a denial of service vulnerability that may allow a remote unauthenticated attacker to cause an affected device to reload or hang. The vulnerability may be triggered by a TCP segment containing crafted TCP options that is received during the TCP session establishment phase. In addition to specific, crafted TCP options, the device must have a special configuration to be affected by this vulnerability.

Cisco has released free software updates that address this vulnerability.

This advisory is posted at:

http://www.cisco.com/warp/public/707/cisco-sa-20100324-tcp.shtml

Note: The March 24, 2010, Cisco IOS Software Security Advisory bundled publication includes seven Security Advisories. All the advisories address vulnerabilities in Cisco IOS Software. 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 March 24, 2010, or earlier:

http://www.cisco.com/warp/public/707/cisco-sa-20100324-bundle.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_mar10.html

Affected Products =================

Vulnerable Products +------------------

Vulnerable devices are running an affected version of Cisco IOS Software, and are configured for any of the following:

* A specific TCP window size * TCP path MTU discovery (PMTUD) * Stateful Network Address Translation (SNAT) with TCP as the transport protocol

Configurations Using a Specific TCP Window Size ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Devices configured to use a specific TCP receive window size for connections originating on the device are affected by this vulnerability. A device configured with a specific TCP receive window size has the following command in its configuration:

ip tcp window-size <window size, from 0 to 1073741823>

If the TCP window size has not been explicitly configured with the command "ip tcp window-size <window size, from 0 to 1073741823>" then the device is not affected by the vulnerability.

Configurations Using Path MTU Discovery ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Devices configured to use PMTUD for TCP connections originating or terminating on the device are also affected by this vulnerability. Different Cisco IOS Software features may allow to enable or disable PMTUD on a per-feature basis. The following list contains features known to enable PMTUD for TCP connections:

* TCP over IPv4: the "ip tcp path-mtu-discovery" command enables PMTUD for all new TCP over IPv4 connections from the device. This command is disabled by default. * TCP over IPv6: PMTUD is enabled by default for IPV6 and cannot be disabled. * Border Gateway Protocol (BGP): recent versions of Cisco IOS Software (Cisco IOS Release 12.2(33)SRA, 12.2(31)SB, 12.2(33)SXH, 12.4(20)T and later releases) automatically enable PMTUD for all BGP neighbor sessions when BGP is configured. Refer to:

http://www.cisco.com/en/US/docs/ios/12_2sr/12_2sra/feature/guide/srbgpmtu.ht...

for details.

Other features like generic routing encapsulation (GRE), IP-in-IP tunneling, and Layer 2 Tunneling Protocol (L2TP) also allow the use of PMTUD. However, these are not related to TCP services and therefore are not affected by this vulnerability.

Configurations Using Stateful NAT with TCP as the Transport Protocol ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Devices configured to use SNAT are also affected by this vulnerability. A device configured to use SNAT with TCP as the transport protocol has the following commands in its configuration:

ip nat Stateful id <stateful NAT ID number> redundancy <redundancy group name> ... protocol tcp !

Note that to be affected under an SNAT configuration scenario, the SNAT transport protocol must be TCP. Recent versions of Cisco IOS Software do not support the use of TCP as the SNAT transport protocol (they only support UDP), in which case the use of SNAT does not make a device vulnerable. SNAT is not enabled by default, and when SNAT is configured, the default transport protocol is TCP if the Cisco IOS Software release supports TCP as a transport protocol for SNAT.

Determining The Cisco IOS Software Version ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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 is displayed 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/warp/public/620/1.html

Products Confirmed Not Vulnerable +--------------------------------

Cisco IOS XR Software is not affected.

Cisco IOS XE Software is not affected.

No other Cisco products are currently known to be affected by this vulnerability.

Details =======

Cisco IOS Software is affected by a denial of service vulnerability that may allow a remote unauthenticated attacker to cause a device reload or hang.

The vulnerability may only be triggered by a TCP segment received during the TCP session establishment phase. The received TCP segment must contain crafted, not malformed, TCP options. A TCP three-way handshake does not need to be completed to exploit the vulnerability.

To be affected by this vulnerability, a device must be configured for any of the following:

* A specific TCP receive window size * PMTUD * SNAT with TCP as the transport protocol

Refer to the Affected Products section for additional details on these configurations.

The vulnerability exists in the TCP options processing code of Cisco IOS Software. When the vulnerability is triggered, Cisco IOS Software enters an infinite loop that may cause the device to reload or hang. The following syslog messages may indicate that this vulnerability has been exploited:

%SYS-3-CPUHOG: Task is running for (128004)msecs, more than (2000)msecs (23/1),process = IP Input. -Traceback= 0x41CA6AC4 0x41C83170 0x41A22704 0x41F249D4 0x41A24A34 0x41B24C58 %SYS-2-WATCHDOG: Process aborted on watchdog timeout, process = IP Input.

This vulnerability is addressed by Cisco bug ID CSCsz75186 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-0577.

BGP Considerations ~~~~~~~~~~~~~~~~~~

This vulnerability could be exploited through the BGP port (TCP port 179) if all the following conditions are met:

* The device is configured for one or more of the features that make a device affected, as explained above. Note that in recent versions of Cisco IOS Software, configuring BGP automatically enables PMTUD for all BGP neighbor sessions. * The source IP address of an attack packet is the IP address of a configured BGP peer. * If the BGP TTL Security Hack (BTSH)/Generalized TTL Security Mechanism (GTSM) is configured, the TTL of the received attack packet is within the allowed TTL range. * If the BGP peering session is protected by the TCP MD5 option, the attack packet has the correct MD5 hash.

Vulnerability Scoring Details =============================

Cisco has provided scores for the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding CVSS at:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at:

http://intellishield.cisco.com/security/alertmanager/cvss

CSCsz75186 - TCP crash by watchdog timeout due to crafted TCP segment

CVSS Base Score - 7.1

Access Vector - Network Access Complexity - Medium Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete

CVSS Temporal Score - 5.9

Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed

Impact ======

Successful exploitation of the vulnerability may cause the affected device to reload or hang. Repeated exploitation could result in a sustained denial of service condition. In the case of a hang, cycling power to the device may be required to put the device back in service.

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 for this Advisory" column of the table. The "First Fixed Release for all Advisories in 24 March 2010 Bundle Publication" column indicates the earliest possible releases which have fixes for all the published vulnerabilities in this Cisco IOS Security Advisory bundled publication. Cisco recommends upgrading to the latest available release where possible.

+-------------------------------------------------------------------+ | Major | Availability of Repaired Releases | | Release | | |------------+------------------------------------------------------| | Affected | | First Fixed Release for | | 12.0-Based | First Fixed Release for | all Advisories in 24 | | Releases | this Advisory | March 2010 Bundle | | | | Publication | |-------------------------------------------------------------------| | There are no affected 12.0 based releases | |-------------------------------------------------------------------| | Affected | | First Fixed Release for | | 12.1-Based | First Fixed Release for | all Advisories in 24 | | Releases | this Advisory | March 2010 Bundle | | | | Publication | |-------------------------------------------------------------------| | There are no affected 12.1 based releases | |-------------------------------------------------------------------| | Affected | | First Fixed Release for | | 12.2-Based | First Fixed Release for | all Advisories in 24 | | Releases | this Advisory | March 2010 Bundle | | | | Publication | |------------+---------------------------+--------------------------| | 12.2 | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | | | | any release in 15.0M or a | Vulnerable; migrate to | | 12.2B | fixed 12.4 release. | any release in 15.0M or | | | Releases up to and | a fixed 12.4 release. | | | including 12.2(4)B8 are | | | | not vulnerable. | | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | | | | any release in 15.0M or a | Vulnerable; migrate to | | 12.2BC | fixed 12.4 release. | any release in 15.0M or | | | Releases up to and | a fixed 12.4 release. | | | including 12.2(4)BC1b are | | | | not vulnerable. | | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2BW | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; first fixed | | | | in 12.4 | Vulnerable; migrate to | | 12.2BX | | any release in 15.0M or | | | Releases up to and | a fixed 12.4 release. | | | including 12.2(2)BX1 are | | | | not vulnerable. | | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | | | | any release in 15.0M or a | Vulnerable; migrate to | | 12.2BY | fixed 12.4 | any release in 15.0M or | | | release.Releases up to | a fixed 12.4 release. | | | and including 12.2(2)BY3 | | | | are not vulnerable. | | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2BZ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2CX | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2CY | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.2CZ | Vulnerable; migrate to | Vulnerable; migrate to | | | any release in 12.2S | any release in 12.2SRE | |------------+---------------------------+--------------------------| | 12.2DA | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2DD | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2DX | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.2EW | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2EWA | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Releases up to and | | | | including 12.2(37)EX are | | | | not vulnerable. | | 12.2EX | Not Vulnerable | | | | | Releases 12.2(44)EX and | | | | later are not | | | | vulnerable; first fixed | | | | in 12.2SE | |------------+---------------------------+--------------------------| | | | Releases prior to 12.2 | | 12.2EY | Not Vulnerable | (37)EY are vulnerable, | | | | release 12.2(37)EY and | | | | later are 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; first fixed | | | | in 12.2SRC | |------------+---------------------------+--------------------------| | 12.2IRB | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SRC | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IRC | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IRD | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXA | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXB | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXC | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXD | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXE | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXF | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXG | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2IXH | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | Releases up to and | Releases up to and | | 12.2JA | including 12.2(4)JA1 are | including 12.2(4)JA1 are | | | not vulnerable. | not vulnerable. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2JK | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.2MB | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; first fixed | | 12.2MC | any release in 15.0M or a | in 12.4 | | | fixed 12.4 release. | | |------------+---------------------------+--------------------------| | 12.2MRA | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Releases prior to 12.2 | | | | (30)S are vulnerable, | | 12.2S | Not Vulnerable | release 12.2(30)S and | | | | later are not | | | | vulnerable; | |------------+---------------------------+--------------------------| | | | 12.2(33)SB8 | | 12.2SB | Not Vulnerable | | | | | 12.2(31)SB18; Available | | | | on 24-MAR-10 | |------------+---------------------------+--------------------------| | 12.2SBC | Not Vulnerable | Vulnerable; migrate to | | | | any release in 12.2SRE | |------------+---------------------------+--------------------------| | 12.2SCA | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SCB | |------------+---------------------------+--------------------------| | 12.2SCB | Not Vulnerable | 12.2(33)SCB6 | |------------+---------------------------+--------------------------| | 12.2SCC | Not Vulnerable | 12.2(33)SCC1 | |------------+---------------------------+--------------------------| | 12.2SCD | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2SE | Not Vulnerable | 12.2(50)SE4; Available | | | | on 25-MAR-10 | |------------+---------------------------+--------------------------| | 12.2SEA | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2SEB | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2SEC | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2SED | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SE | |------------+---------------------------+--------------------------| | 12.2SEE | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SE | |------------+---------------------------+--------------------------| | 12.2SEF | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Releases prior to 12.2 | | | | (25)SEG4 are vulnerable, | | 12.2SEG | Not Vulnerable | release 12.2(25)SEG4 and | | | | later are not | | | | vulnerable; first fixed | | | | in 12.2SE | |------------+---------------------------+--------------------------| | | | Releases up to 12.2(31) | | | | SG1 are not vulnerable; | | 12.2SG | Not Vulnerable | releases 12.2(40)SG and | | | | later are not | | | | vulnerable. | |------------+---------------------------+--------------------------| | 12.2SGA | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2SL | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2SM | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2SO | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | 12.2SQ | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2SRA | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SRD | |------------+---------------------------+--------------------------| | 12.2SRB | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SRD | |------------+---------------------------+--------------------------| | 12.2SRC | Not Vulnerable | 12.2(33)SRC5 | |------------+---------------------------+--------------------------| | 12.2SRD | Not Vulnerable | 12.2(33)SRD3 | |------------+---------------------------+--------------------------| | 12.2SRE | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | 12.2STE | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2SU | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Releases up to and | | 12.2SV | Not Vulnerable | including 12.2(18)SV2 | | | | are not vulnerable. | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2SVA | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2SVC | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2SVD | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2SVE | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Releases up to and | | | | including 12.2(25)SW3 | | | | are not vulnerable. | | 12.2SW | Not Vulnerable | | | | | Releases 12.2(25)SW12 | | | | and later are not | | | | vulnerable; first fixed | | | | in 15.0M | |------------+---------------------------+--------------------------| | 12.2SX | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SXF | |------------+---------------------------+--------------------------| | 12.2SXA | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SXF | |------------+---------------------------+--------------------------| | 12.2SXB | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SXF | |------------+---------------------------+--------------------------| | 12.2SXD | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SXF | |------------+---------------------------+--------------------------| | 12.2SXE | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SXF | |------------+---------------------------+--------------------------| | 12.2SXF | Not Vulnerable | 12.2(18)SXF17a | |------------+---------------------------+--------------------------| | 12.2SXH | Not Vulnerable | 12.2(33)SXH6 | |------------+---------------------------+--------------------------| | | | 12.2(33)SXI2a | | 12.2SXI | Not Vulnerable | | | | | 12.2(33)SXI3 | |------------+---------------------------+--------------------------| | 12.2SY | Not Vulnerable | Vulnerable; migrate to | | | | any release in 12.2SRE | |------------+---------------------------+--------------------------| | 12.2SZ | Not Vulnerable | Vulnerable; migrate to | | | | any release in 12.2SRE | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | | | | any release in 15.0M or a | Vulnerable; migrate to | | 12.2T | fixed 12.4 | any release in 15.0M or | | | release.Releases up to | a fixed 12.4 release. | | | and including 12.2(4)T7 | | | | are not vulnerable. | | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2TPC | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XA | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XB | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XC | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XD | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.2XE | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XF | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XG | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XH | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XI | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2XJ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2XK | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2XL | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2XM | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Releases prior to 12.2 | | | | (33)XN1 are vulnerable, | | 12.2XN | Not Vulnerable | release 12.2(33)XN1 and | | | | later are not | | | | vulnerable; first fixed | | | | in 12.2SRC | |------------+---------------------------+--------------------------| | 12.2XNA | Please see Cisco IOS-XE | Please see Cisco IOS-XE | | | Software Availability | Software Availability | |------------+---------------------------+--------------------------| | 12.2XNB | Please see Cisco IOS-XE | Please see Cisco IOS-XE | | | Software Availability | Software Availability | |------------+---------------------------+--------------------------| | 12.2XNC | Please see Cisco IOS-XE | Please see Cisco IOS-XE | | | Software Availability | Software Availability | |------------+---------------------------+--------------------------| | 12.2XND | Please see Cisco IOS-XE | Please see Cisco IOS-XE | | | Software Availability | Software Availability | |------------+---------------------------+--------------------------| | 12.2XNE | Please see Cisco IOS-XE | Please see Cisco IOS-XE | | | Software Availability | Software Availability | |------------+---------------------------+--------------------------| | 12.2XNF | Please see Cisco IOS-XE | Please see Cisco IOS-XE | | | Software Availability | Software Availability | |------------+---------------------------+--------------------------| | 12.2XO | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XQ | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | | | | any release in 15.0M or a | Vulnerable; migrate to | | 12.2XR | fixed 12.4 | any release in 15.0M or | | | release.Releases up to | a fixed 12.4 release. | | | and including 12.2(4)XR | | | | are not vulnerable. | | |------------+---------------------------+--------------------------| | 12.2XS | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XT | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XU | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; migrate to | | 12.2XV | Not Vulnerable | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2XW | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2YA | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YB | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2YC | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YD | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | 12.2YE | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YF | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YG | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YH | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YJ | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | 12.2YK | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YL | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2YM | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YN | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2YO | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | | | | any release in 15.0M or a | Vulnerable; migrate to | | 12.2YP | fixed 12.4 | any release in 15.0M or | | | release.Releases up to | a fixed 12.4 release. | | | and including 12.2(8)YP | | | | are not vulnerable. | | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YQ | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YR | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | 12.2YS | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YT | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YU | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YV | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YW | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2YX | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2YY | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2YZ | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | 12.2ZA | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SXF | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2ZB | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2ZC | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2ZD | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2ZE | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2ZF | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2ZG | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.2ZH | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2ZJ | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2ZL | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.2ZP | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | 12.2ZU | Not Vulnerable | Vulnerable; first fixed | | | | in 12.2SXH | |------------+---------------------------+--------------------------| | 12.2ZX | Not Vulnerable | Vulnerable; migrate to | | | | any release in 12.2SRE | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2ZY | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.2ZYA | Not Vulnerable | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | Affected | | First Fixed Release for | | 12.3-Based | First Fixed Release for | all Advisories in 24 | | Releases | this Advisory | March 2010 Bundle | | | | Publication | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3 | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3B | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.3BC | Vulnerable; migrate to | Vulnerable; first fixed | | | any release in 12.2SCB | in 12.2SCB | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3BW | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.3EU | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Releases prior to 12.3 | | | support organization per | (11)JA5 are vulnerable, | | 12.3JA | the instructions in | release 12.3(11)JA5 and | | | Obtaining Fixed Software | later are not vulnerable | | | section of this advisory | | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Releases prior to 12.3 | | | support organization per | (8)JEA4 are vulnerable, | | 12.3JEA | the instructions in | release 12.3(8)JEA4 and | | | Obtaining Fixed Software | later are not vulnerable | | | section of this advisory | | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Releases prior to 12.3 | | | support organization per | (8)JEB2 are vulnerable, | | 12.3JEB | the instructions in | release 12.3(8)JEB2 and | | | Obtaining Fixed Software | later are not vulnerable | | | section of this advisory | | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3JEC | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3JED | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3JK | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3JL | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3JX | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3T | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3TPC | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | 12.3VA | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XA | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3XB | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XC | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XD | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; first fixed | | | Vulnerable; migrate to | in 12.4 | | 12.3XE | any release in 15.0M or a | | | | fixed 12.4 release. | Vulnerable; migrate to | | | | any release in 15.0M or | | | | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3XF | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XG | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Note: Releases prior to | Releases prior to 12.3 | | | 12.3(7)XI11 are | (7)XI11 are vulnerable, | | 12.3XI | vulnerable, release 12.3 | release 12.3(7)XI11 and | | | (7)XI11 and later are not | later are not vulnerable | | | vulnerable; | | |------------+---------------------------+--------------------------| | 12.3XJ | Vulnerable; first fixed | Vulnerable; first fixed | | | in 12.4XR | in 12.4XR | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XK | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XL | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XQ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XR | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XS | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XU | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.3XW | Vulnerable; first fixed | Vulnerable; first fixed | | | in 12.4XR | in 12.4XR | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XX | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XY | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3XZ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YA | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4 release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YD | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.3YF | Vulnerable; first fixed | Vulnerable; first fixed | | | in 12.4XR | in 12.4XR | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YG | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YH | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YI | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YJ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YK | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YM | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YQ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YS | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YT | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3YU | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.3YX | Vulnerable; first fixed | Vulnerable; first fixed | | | in 12.4XR | in 12.4XR | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.3YZ | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.3ZA | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | Affected | | First Fixed Release for | | 12.4-Based | First Fixed Release for | all Advisories in 24 | | Releases | this Advisory | March 2010 Bundle | | | | Publication | |------------+---------------------------+--------------------------| | | 12.4(25c) | | | | | 12.4(25c) | | 12.4 | 15.0(1)M1 | | | | | 15.0(1)M1 | | | 15.0(1)M2 ; Available on | | | | 26-MAR-10 | | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4GC | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4JA | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4JDA | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4JDC | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | 12.4(10b)JDD1 | | | | | | | | Vulnerable; Contact your | | | 12.4JDD | support organization per | 12.4(10b)JDD1 | | | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | | |------------+---------------------------+--------------------------| | 12.4JHA | Not Vulnerable | Not Vulnerable | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4JK | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4JL | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Releases prior to 12.4 | | | support organization per | (3g)JMA2 are vulnerable, | | 12.4JMA | the instructions in | release 12.4(3g)JMA2 and | | | Obtaining Fixed Software | later are not vulnerable | | | section of this advisory | | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4JMB | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | 12.4JX | Vulnerable; first fixed | Vulnerable; first fixed | | | in 12.4JA | in 12.4JA | |------------+---------------------------+--------------------------| | | 12.4(11)MD10 | | | 12.4MD | | 12.4(24)MD | | | 12.4(15)MD4 12.4(24)MD | | |------------+---------------------------+--------------------------| | 12.4MDA | 12.4(22)MDA2 | 12.4(22)MDA2 | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4MR | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4SW | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | 12.4(22)T3 | 12.4(15)T12 | | | | | | | 12.4(20)T4 | 12.4(20)T5 | | 12.4T | | | | | 12.4(15)T10 | 12.4(24)T3; Available on | | | | 26-MAR-10 | | | 12.4(24)T2 | | | | | 12.4(22)T4 | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XA | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XB | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XC | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XD | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XE | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XF | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XG | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XJ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XK | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4XL | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XM | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4XN | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4XP | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XQ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | 12.4XR | 12.4(22)XR3 | 12.4(22)XR3 | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XT | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4XV | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XW | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XY | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4XZ | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | Vulnerable; migrate to | Vulnerable; migrate to | | 12.4YA | any release in 15.0M or a | any release in 15.0M or | | | fixed 12.4T release. | a fixed 12.4 release. | |------------+---------------------------+--------------------------| | | | Vulnerable; Contact your | | | | support organization per | | 12.4YB | 12.4(22)YB5 | the instructions in | | | | Obtaining Fixed Software | | | | section of this advisory | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4YD | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | | 12.4(22)YE2 | 12.4(22)YE2 | | 12.4YE | | | | | 12.4(24)YE | 12.4(24)YE | |------------+---------------------------+--------------------------| | | Vulnerable; Contact your | Vulnerable; Contact your | | | support organization per | support organization per | | 12.4YG | the instructions in | the instructions in | | | Obtaining Fixed Software | Obtaining Fixed Software | | | section of this advisory | section of this advisory | |------------+---------------------------+--------------------------| | Affected | | First Fixed Release for | | 15.0-Based | First Fixed Release for | all Advisories in 24 | | Releases | this Advisory | March 2010 Bundle | | | | Publication | |-------------------------------------------------------------------| | There are no affected 15.0 based releases | |-------------------------------------------------------------------| | Affected | | First Fixed Release for | | 15.1-Based | First Fixed Release for | all Advisories in 24 | | Releases | this Advisory | March 2010 Bundle | | | | Publication | |-------------------------------------------------------------------| | There are no affected 15.1 based releases | +-------------------------------------------------------------------+

Cisco IOS-XE Software +--------------------

+-------------------------------------------------------------------+ | IOS-XE Release | First Fixed Release | |----------------------------+--------------------------------------| | 2.1.x | Not Vulnerable | |----------------------------+--------------------------------------| | 2.2.x | Not Vulnerable | |----------------------------+--------------------------------------| | 2.3.x | Not Vulnerable | |----------------------------+--------------------------------------| | 2.4.x | Not Vulnerable | |----------------------------+--------------------------------------| | 2.5.x | Not Vulnerable | |----------------------------+--------------------------------------| | 2.6.x | Not Vulnerable | +-------------------------------------------------------------------+

Workarounds ===========

There are no workarounds to mitigate this vulnerability other than disabling the specific features that make a device vulnerable, if feasible.

Additionally, allowing only legitimate devices to connect to affected devices will help limit exposure to this vulnerability. Refer to the Control Plane Policing and Configuring Infrastructure Access Lists (iACLs) subsections below for further details. Since a TCP three-way handshake is not required, to increase effectiveness, the mitigation must be coupled with anti-spoofing measures on the network edge.

Specific mitigations for BGP are discussed below in the BGP Considerations subsection.

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 Cisco IOS Software Crafted TCP Packet Denial of Service Vulnerability", which is available at the following location:

http://www.cisco.com/warp/public/707/cisco-amb-20100324-tcp.shtml

Configurations Using a Specific TCP Window Size +----------------------------------------------

Not setting a specific TCP receive window size can be accomplished by removing the "ip tcp window-size" command from the configuration.

Configurations Using Path MTU Discovery +--------------------------------------

PMTUD may be disabled in some of the Cisco IOS Software features that make use of PMTUD. The specific command to use to disable PMTUD varies depending on the specific feature:

* TCP over IPv4: removing the "ip tcp path-mtu-discovery" command from the configuration will disable PMTUD for TCP over IPv4 sessions that originate on the device. * TCP over IPv6: PMTUD is enabled by default for IPV6 and cannot be disabled. * BGP: if BGP is configured on a recent version of Cisco IOS Software that enables PMTUD for BGP sessions, PMTUD can be disabled for all BGP sessions with the "no bgp transport path-mtu-discovery" command in router configuration mode (Cisco IOS Release 12.2(33)SRA, 12.2(31)SB, 12.2(33)SXH, 12.4(20)T, and later releases).

Configurations Using Stateful NAT with TCP as the Transport Protocol +-------------------------------------------------------------------

SNAT can be disabled by removing the "ip nat Stateful id" command from the configuration.

Control Plane Policing +---------------------

For devices that need to offer TCP services, it is possible to use Control Plane Policing (CoPP) to block TCP traffic to the device from untrusted sources. Cisco IOS 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 specific network configurations:

!-- 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. !-- Note that TCP ports 22 and 23 are just examples; this configuration !-- needs to be expanded to include all used TCP ports.

access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 22 access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 23 access-list 100 deny tcp host 172.16.1.1 any eq 22 access-list 100 deny tcp host 172.16.1.1 any eq 23 access-list 100 permit tcp any any

!-- 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-tcp-class match access-group 100

!-- Create a Policy-Map that will be applied to the !-- Control-Plane of the device, and add the "drop-tcp-traffic" !-- class map.

policy-map control-plane-policy class drop-tcp-class drop

!-- Apply the Policy-Map to the Control-Plane of the !-- device.

control-plane service-policy input control-plane-policy

Warning: Because a TCP three-way handshake is not required to exploit this vulnerability, it is possible to easily spoof the IP address of the sender, which may defeat access control lists (ACLs) that permit communication to these ports from trusted IP addresses.

In the above CoPP example, the access control 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/web/about/security/intelligence/coppwp_gs.html

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrtlimt.html

Configuring Infrastructure Access Lists (iACLs) +----------------------------------------------

Although it is often difficult to block traffic transiting your network, it is possible to identify traffic that should never be allowed to target your infrastructure devices and block that traffic at the border of your network. Infrastructure ACLs are considered a network security best practice and should be considered as a long-term addition to good network security as well as a workaround for this specific vulnerability. The white paper entitled "Protecting Your Core: Infrastructure Protection Access Control Lists" presents guidelines and recommended deployment techniques for infrastructure protection ACLs:

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a00...

BGP Considerations +-----------------

BTSH/GTSM can help prevent exploitation of this vulnerability via the BGP port because packets coming from devices that do not pass the TTL check configured via BTSH are dropped before any TCP processing takes place. For information on BTSH refer to:

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t7/feature/guide/gt_btsh.html

MD5 authentication for BGP peering sessions can also help prevent exploitation via the BGP port because the MD5 hash in an attack packet is checked before processing the crafted TCP option. For a detailed discussion on how to configure BGP, refer to the following document:

http://www.cisco.com/en/US/docs/ios/12_0/np1/configuration/guide/1cbgp.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/docs/general/warranty/English/EU1KEN_.html

or as otherwise set forth at Cisco.com Downloads at:

http://www.cisco.com/public/sw-center/sw-usingswc.shtml

Do not contact psirt@cisco.com or security-alert@cisco.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@cisco.com

Customers should have their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC.

Refer to:

http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages.

Exploitation and Public Announcements =====================================

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

This vulnerability was discovered during the resolution 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-20100324-tcp.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@cisco.com * first-bulletins@lists.first.org * bugtraq@securityfocus.com * vulnwatch@vulnwatch.org * cisco@spot.colorado.edu * cisco-nsp@puck.nether.net * full-disclosure@lists.grok.org.uk * comp.dcom.sys.cisco@newsgate.cisco.com

Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates.

Revision History ================

+-------------------------------------------------------------------+ | Revision 1.0 | 2010-March-24 | Initial public release | +-------------------------------------------------------------------+

Cisco Security Procedures =========================

Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at:

http://www.cisco.com/en/US/products/products_security_vulnerability_policy.h...

This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at:

http://www.cisco.com/go/psirt