-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Cisco Security Advisory: Cisco IOS Software IPv6 over MPLS Vulnerabilities Advisory ID: cisco-sa-20110928-ipv6mpls Revision 1.0 For Public Release 2011 September 28 1600 UTC (GMT) +--------------------------------------------------------------------- Summary ======= Cisco IOS Software is affected by two vulnerabilities that cause a Cisco IOS device to reload when processing IP version 6 (IPv6) packets over a Multiprotocol Label Switching (MPLS) domain. These vulnerabilities are: * Crafted IPv6 Packet May Cause MPLS-Configured Device to Reload * ICMPv6 Packet May Cause MPLS-Configured Device to Reload Cisco has released free software updates that address these vulnerabilities. Workarounds that mitigate these vulnerabilities are available. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20110928-ipv6mpls.shtml. Note: The September 28, 2011, Cisco IOS Software Security Advisory bundled publication includes ten Cisco Security Advisories. Nine of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses a vulnerability in Cisco Unified Communications Manager. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the September 2011 Bundled Publication. Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at the following link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep11.html Affected Products ================= Vulnerable Products +------------------ Cisco IOS Software or Cisco IOS XE Software devices (hereafter both referenced as Cisco IOS Software in this document) that are running vulnerable versions of Cisco IOS Software and configured for MPLS are affected by two vulnerabilities related to IPv6 traffic that traverses an MPLS domain. The two vulnerabilities are independent of each other. Note: IPv6 does not need to be configured on the affected devices themselves. The vulnerabilities do require the MPLS label switched packets to have specific IPv6 payloads to be exploited. To determine whether a device is configured for MPLS, log in to the device and issue the command-line interface (CLI) command "show mpls interface". If the IP state is "Yes", the device is vulnerable. The following example shows a device that has MPLS configured on interface Ethernet0/0: Router#show mpls interface Interface IP Tunnel BGP Static Operational Ethernet0/0 Yes (ldp) No No No Yes Router# The following two examples show responses from a device with MPLS forwarding disabled. The first example shows a return of no interfaces: router#show mpls interface Interface IP Tunnel BGP Static Operational routers# In the second example, the device provides a message indicating that MPLS forwarding is not configured: router#show mpls interface no MPLS apps enabled or MPLS not enabled on any interfaces router# To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the "show version" command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the "show version" command or may provide different output. The following example identifies a Cisco product that is running Cisco IOS Software Release 15.0(1)M1 with an installed image name of C3900-UNIVERSALK9-M: Router> show version Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Wed 02-Dec-09 17:17 by prod_rel_team !--- output truncated Additional information about Cisco IOS Software release naming conventions is available in the white paper Cisco IOS and NX-OS Software Reference Guide at http://www.cisco.com/web/about/security/intelligence/ios-ref.html. Products Confirmed Not Vulnerable +-------------------------------- Devices that are not configured for MPLS are not vulnerable. The following products have been confirmed not to be affected by these vulnerabilities: * Cisco IOS XR Software No other Cisco products are currently known to be affected by these vulnerabilities. Details ======= The packet handling nodes in an MPLS network are called provider routers (P routers) and provider edge routers (PE routers) and are configured with MPLS. Both P and PE routers are vulnerable to both the vulnerabilities disclosed in this advisory. In networks that have MPLS enabled and could carry MPLS label switched packets with IPv6 payloads, the device may crash when processing MPLS label switched packets with specific IPv6 payloads. Typical deployment scenarios that would be affected by either vulnerability would be Cisco IPv6 Provider Edge Router (6PE) or IPv6 VPN Provider Edge Router (6VPE). Crafted IPv6 Packet May Cause MPLS-Configured Device to Reload +------------------------------------------------------------- A crafted IPv6 packet may cause the device to crash when the packet is processed by Cisco IOS Software because the MPLS TTL has expired. The crafted packet used to exploit this vulnerability would be silently discarded in Cisco IOS Software if received on an interface where the packet did not have an MPLS label. This vulnerability is documented in Cisco bug ID CSCto07919 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-3274. ICMPv6 Packet May Cause MPLS-Configured Device to Reload +------------------------------------------------------------- A valid ICMPv6 packet may cause the device to crash when the packet is processed by Cisco IOS Software because the MPLS TTL has expired. The packet used to exploit this vulnerability would not affect Cisco IOS Software if received on an interface where the packet did not have an MPLS label. This vulnerability is documented in Cisco bug ID CSCtj30155 and has been assigned CVE ID CVE-2011-3282. Vulnerability Scoring Details ============================= Cisco has provided scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0. CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response. Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks. Cisco has provided an FAQ to answer additional questions regarding CVSS at: http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at: http://intellishield.cisco.com/security/alertmanager/cvss * CSCto07919 ("Crafted IPv6 packet may cause MPLS configured device to reload") CVSS Base Score - 6.1 Access Vector - Adjacent Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete CVSS Temporal Score - 5.0 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed * CSCtj30155 ("ICMPv6 packet may cause MPLS configured device to reload") CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed Impact ====== Successful exploitation of these vulnerabilities may cause the device to reload. Repeated exploitation could result in a sustained denial of service condition. Software Versions and Fixes =========================== When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution. In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance. Additionally, the Cisco IOS Software Checker is available on the Cisco Security Intelligence Operations (SIO) portal at http://tools.cisco.com/security/center/selectIOSVersion.x. It provides several features for checking which Security Advisories affect specified versions of Cisco IOS Software. Cisco IOS Software +----------------- Each row of the following Cisco IOS Software table corresponds to a Cisco IOS Software train. If a particular train is vulnerable, the earliest releases that contain the fix are listed in the First Fixed Release For This Advisory column. The First Fixed Release for All Advisories in the September 2011 Bundled Publication column lists the earliest possible releases that correct all the published vulnerabilities in the Cisco IOS Software Security Advisory bundled publication. Cisco recommends upgrading to the latest available release, where possible. +------------------------------------------------------------+ | Major | Availability of Repaired Releases | | Release | | |------------+-----------------------------------------------| | Affected | | First Fixed Release | | 12.0-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------------------------------------------------------| | There are no affected 12.0-based releases | |------------------------------------------------------------| | Affected | | First Fixed Release | | 12.1-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------+-----------------------+-----------------------| | 12.1E | Not vulnerable | 12.2(18)SXF17b | |------------+-----------------------+-----------------------| | Affected | | First Fixed Release | | 12.2-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------+-----------------------+-----------------------| | 12.2 | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2B | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2BC | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2BW | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2BX | Not vulnerable | fixed in Release | | | | 12.2SB | |------------+-----------------------+-----------------------| | 12.2BY | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2BZ | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2CX | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2CY | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2CZ | Not vulnerable | fixed in Release | | | | 12.2SB | |------------+-----------------------+-----------------------| | 12.2DA | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2DD | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2DX | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2EU | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Releases up to and | | 12.2EW | Not vulnerable | including 12.2(20)EW4 | | | | are not vulnerable. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2EWA | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2EX | Not vulnerable | 12.2(55)EX3 | |------------+-----------------------+-----------------------| | 12.2EY | Not vulnerable | 12.2(58)EY | |------------+-----------------------+-----------------------| | | | Vulnerable; migrate | | 12.2EZ | Not vulnerable | to any release in | | | | 15.0SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2FX | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2FY | Not vulnerable | fixed in Release | | | | 12.2EX | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2FZ | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Vulnerable; migrate | | 12.2IRA | Not vulnerable | to any release in | | | | 12.2IRG | |------------+-----------------------+-----------------------| | | | Vulnerable; migrate | | 12.2IRB | Not vulnerable | to any release in | | | | 12.2IRG | |------------+-----------------------+-----------------------| | | | Vulnerable; migrate | | 12.2IRC | Not vulnerable | to any release in | | | | 12.2IRG | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IRD | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IRE | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; migrate | | 12.2IRF | Not vulnerable | to any release in | | | | 12.2IRG | |------------+-----------------------+-----------------------| | 12.2IRG | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXA | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXB | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXC | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXD | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXE | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXF | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXG | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2IXH | Not vulnerable | instructions in the | | | | 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 | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2MRA | Not vulnerable | fixed in Release | | | | 12.2SRD | |------------+-----------------------+-----------------------| | 12.2MRB | Not vulnerable | 12.2(33)MRB5 | |------------+-----------------------+-----------------------| | | | Releases prior to | | | | 12.2(30)S are | | | | vulnerable; Releases | | 12.2S | Not vulnerable | 12.2(30)S and later | | | | are not vulnerable. | | | | First fixed in | | | | Release 12.2SB | |------------+-----------------------+-----------------------| | | | 12.2(31)SB20 | | 12.2SB | Not vulnerable | | | | | 12.2(33)SB10 | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SBC | Not vulnerable | fixed in Release | | | | 12.2SB | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SCA | Not vulnerable | fixed in Release | | | | 12.2SCC | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SCB | Not vulnerable | fixed in Release | | | | 12.2SCC | |------------+-----------------------+-----------------------| | 12.2SCC | Not vulnerable | 12.2(33)SCC7 | |------------+-----------------------+-----------------------| | 12.2SCD | Not vulnerable | 12.2(33)SCD6 | |------------+-----------------------+-----------------------| | | | 12.2(33)SCE1 | | 12.2SCE | Not vulnerable | | | | | 12.2(33)SCE2 | |------------+-----------------------+-----------------------| | 12.2SCF | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | 12.2(55)SE3 | | 12.2SE | Not vulnerable | | | | | 12.2(58)SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SEA | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SEB | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SEC | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SED | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SEE | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SEF | Not vulnerable | fixed in Release | | | | 12.2SE | |------------+-----------------------+-----------------------| | | | Releases prior to | | | | 12.2(25)SEG4 are | | | | vulnerable; Releases | | 12.2SEG | Not vulnerable | 12.2(25)SEG4 and | | | | later are not | | | | vulnerable. First | | | | fixed in Release | | | | 12.2EX | |------------+-----------------------+-----------------------| | | | Releases prior to | | | | 12.2(53)SG4 are | | 12.2SG | Not vulnerable | vulnerable; Releases | | | | 12.2(53)SG4 and later | | | | are not vulnerable. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2SGA | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2SL | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2SM | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2SO | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2SQ | Not vulnerable | 12.2(50)SQ3 | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SRA | Not vulnerable | fixed in Release | | | | 12.2SRD | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SRB | Not vulnerable | fixed in Release | | | | 12.2SRD | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SRC | Not vulnerable | fixed in Release | | | | 12.2SRD | |------------+-----------------------+-----------------------| | 12.2SRD | Not vulnerable | 12.2(33)SRD6 | |------------+-----------------------+-----------------------| | 12.2SRE | 12.2(33)SRE4 | 12.2(33)SRE4 | |------------+-----------------------+-----------------------| | 12.2STE | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2SU | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | | | Releases prior to | | | | 12.2(29a)SV are | | | | vulnerable; Releases | | 12.2SV | Not vulnerable | 12.2(29a)SV 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 | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2SW | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SX | Not vulnerable | fixed in Release | | | | 12.2SXF | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SXA | Not vulnerable | fixed in Release | | | | 12.2SXF | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SXB | Not vulnerable | fixed in Release | | | | 12.2SXF | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SXD | Not vulnerable | fixed in Release | | | | 12.2SXF | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SXE | Not vulnerable | fixed in Release | | | | 12.2SXF | |------------+-----------------------+-----------------------| | 12.2SXF | Not vulnerable | 12.2(18)SXF17b | |------------+-----------------------+-----------------------| | 12.2SXH | Not vulnerable | 12.2(33)SXH8a | |------------+-----------------------+-----------------------| | 12.2SXI | Not vulnerable | 12.2(33)SXI6 | |------------+-----------------------+-----------------------| | 12.2SXJ | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2SY | Not vulnerable | 12.2(50)SY | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2SZ | Not vulnerable | fixed in Release | | | | 12.2SB | |------------+-----------------------+-----------------------| | 12.2T | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2TPC | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2XA | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XB | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2XC | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XD | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XE | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XF | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XG | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XH | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XI | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XJ | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XK | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XL | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XM | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XN | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XNA | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | 12.2XNB | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | 12.2XNC | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | 12.2XND | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | 12.2XNE | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | 12.2XNF | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | | | Releases prior to | | | | 12.2(54)XO are | | 12.2XO | Not vulnerable | vulnerable; Releases | | | | 12.2(54)XO and later | | | | are not vulnerable. | |------------+-----------------------+-----------------------| | 12.2XQ | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XR | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XS | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XT | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XU | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XV | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2XW | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2YA | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2YB | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2YC | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2YD | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2YE | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YF | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YG | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YH | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YJ | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2YK | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YL | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2YM | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YN | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2YO | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2YP | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YQ | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YR | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YS | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YT | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YU | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YV | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YW | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YX | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YY | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2YZ | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2ZA | Not vulnerable | fixed in Release | | | | 12.2SXF | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2ZB | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2ZC | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2ZD | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2ZE | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2ZF | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2ZG | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 12.2ZH | Not vulnerable | Vulnerable; first | | | | fixed in Release 12.4 | |------------+-----------------------+-----------------------| | 12.2ZJ | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2ZL | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 12.2ZP | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; first | | 12.2ZU | Not vulnerable | fixed in Release | | | | 12.2SXH | |------------+-----------------------+-----------------------| | 12.2ZX | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2ZY | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 12.2ZYA | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | Affected | | First Fixed Release | | 12.3-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------------------------------------------------------| | There are no affected 12.3-based releases | |------------------------------------------------------------| | Affected | | First Fixed Release | | 12.4-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------------------------------------------------------| | There are no affected 12.4-based releases | |------------------------------------------------------------| | Affected | | First Fixed Release | | 15.0-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------+-----------------------+-----------------------| | 15.0M | 15.0(1)M7 | 15.0(1)M7 | |------------+-----------------------+-----------------------| | | Vulnerable; contact | Vulnerable; contact | | | your support | your support | | | organization per the | organization per the | | 15.0MR | instructions in the | instructions in the | | | Obtaining Fixed | Obtaining Fixed | | | Software section of | Software section of | | | this advisory. | this advisory. | |------------+-----------------------+-----------------------| | | Vulnerable; contact | Vulnerable; contact | | | your support | your support | | | organization per the | organization per the | | 15.0MRA | instructions in the | instructions in the | | | Obtaining Fixed | Obtaining Fixed | | | Software section of | Software section of | | | this advisory. | this advisory. | |------------+-----------------------+-----------------------| | 15.0S | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 15.0SA | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 15.0SE | Not vulnerable | Not vulnerable | |------------+-----------------------+-----------------------| | 15.0SG | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | | Vulnerable; first | Vulnerable; first | | 15.0XA | fixed in Release | fixed in Release | | | 15.1T | 15.1T | |------------+-----------------------+-----------------------| | 15.0XO | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | Affected | | First Fixed Release | | 15.1-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 15.1EY | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | | Vulnerable; first | Vulnerable; first | | 15.1GC | fixed in Release | fixed in Release | | | 15.1T | 15.1T | |------------+-----------------------+-----------------------| | 15.1M | 15.1(4)M1 | 15.1(4)M2; Available | | | | on 30-SEP-11 | |------------+-----------------------+-----------------------| | | | Vulnerable; contact | | | | your support | | | | organization per the | | 15.1MR | Not vulnerable | instructions in the | | | | Obtaining Fixed | | | | Software section of | | | | this advisory. | |------------+-----------------------+-----------------------| | 15.1S | See Cisco IOS-XE | See Cisco IOS-XE | | | Software Availability | Software Availability | |------------+-----------------------+-----------------------| | | 15.1(1)T4; Available | | | | on 09-DEC-11 | 15.1(2)T4 | | 15.1T | | | | | 15.1(2)T4 | 15.1(1)T4 on | | | | 8-Dec-2011 | | | 15.1(3)T2 | | |------------+-----------------------+-----------------------| | | Vulnerable; first | Vulnerable; first | | 15.1XB | fixed in Release | fixed in Release | | | 15.1T | 15.1T | |------------+-----------------------+-----------------------| | Affected | | First Fixed Release | | 15.2-Based | First Fixed Release | for All Advisories in | | Releases | For This Advisory | the September 2011 | | | | Bundled Publication | |------------------------------------------------------------| | There are no affected 15.2-based releases | +------------------------------------------------------------+ Cisco IOS XE Software +-------------------- Cisco IOS XE Software is affected by the vulnerability disclosed in this document. +------------------------------------------------------------+ | Cisco | First Fixed | First Fixed Release for All | | IOS XE | Release For | Advisories in the September | | Release | This Advisory | 2011 Bundled Publication | |----------+----------------+--------------------------------| | | Vulnerable; | | | 2.1.x | migrate to | Vulnerable; migrate to 3.3.2S | | | 3.3.2S or | or later | | | later | | |----------+----------------+--------------------------------| | | Vulnerable; | | | 2.2.x | migrate to | Vulnerable; migrate to 3.3.2S | | | 3.3.2S or | or later | | | later | | |----------+----------------+--------------------------------| | | Vulnerable; | | | 2.3.x | migrate to | Vulnerable; migrate to 3.3.2S | | | 3.3.2S or | or later | | | later | | |----------+----------------+--------------------------------| | | Vulnerable; | | | 2.4.x | migrate to | Vulnerable; migrate to 3.3.2S | | | 3.3.2S or | or later | | | later | | |----------+----------------+--------------------------------| | | Vulnerable; | | | 2.5.x | migrate to | Vulnerable; migrate to 3.3.2S | | | 3.3.2S or | or later | | | later | | |----------+----------------+--------------------------------| | | Vulnerable; | | | 2.6.x | migrate to | Vulnerable; migrate to 3.3.2S | | | 3.3.2S or | or later | | | later | | |----------+----------------+--------------------------------| | 3.1.xS | 3.1.4S | Vulnerable; migrate to 3.3.2S | | | | or later | |----------+----------------+--------------------------------| | 3.1.xSG | Not vulnerable | Vulnerable; migrate to 3.2.0SG | | | | or later | |----------+----------------+--------------------------------| | | Vulnerable; | | | 3.2.xS | migrate to | Vulnerable; migrate to 3.3.2S | | | 3.3.2S or | or later | | | later | | |----------+----------------+--------------------------------| | 3.2.xSG | Not vulnerable | Not vulnerable | |----------+----------------+--------------------------------| | 3.3.xS | 3.3.2S | 3.3.2S | |----------+----------------+--------------------------------| | 3.4.xS | Not vulnerable | Not vulnerable | +------------------------------------------------------------+ For mapping of Cisco IOS XE to Cisco IOS releases, please refer to the Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S Release Notes, and Cisco IOS XE 3SG Release Notes. Cisco IOS XR Software +-------------------- Cisco IOS XR Software is not affected by the vulnerability disclosed in this document. Cisco IOS XR Software is not affected by any of the vulnerabilities in the September 2011 bundled publication. Workarounds =========== For both vulnerabilities the following workaround applies: Disabling MPLS TTL Propagation +----------------------------- Disabling MPLS TTL propagation will prevent exploitation of these vulnerabilities. MPLS TTL propagation will have to be disabled on all PE routers in the MPLS domain. To disable MPLS TTL propagation, enter the global configuration command "no mpls ip propagate-ttl". If only "no mpls ip propagate-ttl forward" is configured, the vulnerabilities could still be exploited from within the MPLS domain. For more information about the MPLS TTL propagation command, refer to the configuration guide at: http://www.cisco.com/en/US/docs/ios/mpls/command/reference/mp_m1.html#wp1013... 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 vulnerabilities described in this advisory. These vulnerabilities were discovered when handling customer support calls. Status of this Notice: FINAL ============================ THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors. Distribution ============ This advisory is posted on Cisco's worldwide website at: http://www.cisco.com/warp/public/707/cisco-sa-20110928-ipv6mpls.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 | 2011-September-28 | Initial public release | +------------------------------------------------------------+ Cisco Security Procedures ========================= Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/en/US/products/products_security_vulnerability_policy.h.... This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt. +-------------------------------------------------------------------- Copyright 2010-2011 Cisco Systems, Inc. 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