var-200809-0037
Vulnerability from variot
A "logic error" in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching (MPLS) VPN with extended communities is configured, sometimes causes a corrupted route target (RT) to be used, which allows remote attackers to read traffic from other VPNs in opportunistic circumstances. Cisco IOS (Internetwork Operating System) is an operating system commonly used on Cisco routers and network switches. This vulnerability is tracked by Cisco Bug ID CSCee83237 and CVE-2008-3803. ----------------------------------------------------------------------
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TITLE: Cisco IOS Multiple Vulnerabilities
SECUNIA ADVISORY ID: SA31990
VERIFY ADVISORY: http://secunia.com/advisories/31990/
CRITICAL: Moderately critical
IMPACT: Exposure of sensitive information, DoS, System access
WHERE:
From remote
OPERATING SYSTEM: Cisco IOS R12.x http://secunia.com/advisories/product/50/ Cisco IOS 12.x http://secunia.com/advisories/product/182/
DESCRIPTION: Some vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious people to disclose sensitive information, cause a DoS (Denial of Service), or to compromise a vulnerable system.
1) An unspecified error exists in the processing of SSL packets during the termination of an SSL session, which can potentially be exploited to crash an affected system.
2) Two unspecified errors exist within the processing of Protocol Independent Multicast (PIM) packets, which can be exploited to cause an affected device to reload.
3) Unspecified errors within the processing of segmented Skinny Call Control Protocol (SCCP) messages can be exploited to cause a Cisco IOS device to reload.
Successful exploitation requires that the device is configured with Network Address Translation (NAT) SCCP Fragmentation Support.
4) A memory leak in the processing of Session Initiation Protocol (SIP) messages can be exploited to cause a DoS for all voice services.
5) Multiple unspecified errors exist in the processing of SIP messages, which can be exploited to cause a reload of an affected device.
6) An unspecified error in the IOS Intrusion Prevention System (IPS) feature when processing certain IPS signatures that use the SERVICE.DNS engine can be exploited to cause a DoS via specially crafted network traffic.
NOTE: This security issue was introduced with CSCee83237.
8) An unspecified error within the Multi Protocol Label Switching (MPLS) Forwarding Infrastructure (MFI) can be exploited to cause a DoS via specially crafted network packets.
Successful exploitation requires access to the MPLS network.
9) An unspecified error within the Application Inspection Control (AIC) can be exploited to cause a reload of an affected device via specially crafted HTTP packets.
10) An unspecified error in the processing of Layer 2 Tunneling Protocol (L2TP) packets can be exploited to cause an affected device to reload via a specially crafted L2TP packets.
Successful exploitation requires that the L2TP mgmt daemon process is running. This process may be enabled e.g. via Layer 2 virtual private networks (L2VPN), Layer 2 Tunnel Protocol Version 3 (L2TPv3), Stack Group Bidding Protocol (SGBP), or Cisco Virtual Private Dial-Up Networks (VPDN).
11) An unspecified error exists in the processing of IPC messages. This can be exploited to reload an affected device via a specially crafted UDP packet sent to port 1975.
12) A security issue is caused due to the device automatically enabling SNMP with a default community string, which can be exploited to gain control an affected system.
Successful exploitation requires that a device is configured for linecard redundancy.
SOLUTION: Update to the fixed version (please see the vendor's advisories for details).
PROVIDED AND/OR DISCOVERED BY: Reported by the vendor.
ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml
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.
Workarounds are available to help mitigate this vulnerability.
This issue is triggered by a logic error when processing extended communities on the PE device.
This issue cannot be deterministically exploited by an attacker.
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-20080924-vpn.shtml
NOTE: The September 24, 2008 IOS Advisory bundled publication includes twelve Security Advisories. Eleven of the advisories address vulnerabilities in Cisco's IOS software, and one advisory addresses vulnerabilities in Cisco Unified Communications Manager. Each Advisory lists the releases that correct the vulnerability described in the Advisory. Please reference the following software table to find a release that fixes all published IOS software Advisories as of September 24th, 2008:
http://www.cisco.com/warp/public/707/cisco-sa-20080924-bundle.shtml
Individual publication links are listed below:
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-cucm.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml
Affected Products
Products running Cisco IOS versions 12.0S, 12.2, 12.3 or 12.4 and configured for MPLS VPNs or VRF Lite are potentially affected.
Cisco IOS releases based on 12.1 are not affected.
Vulnerable Products +------------------
Cisco IOS devices are vulnerable if they are configured for MPLS VPN or VRF Lite and have a BGP session between the CE and PE devices, and process extended communities. If a device is configured for MPLS VPN or VRF Lite the command address-family ipv4 vrf or address-family ipv6 vrf will be present in the device configuration.
The following shows a command executed on a device configured for MPLS VPN:
router#show running-config | include address-family [ipv4|ipv6]
address-family ipv4 vrf <vrf-name>
The following shows a PE device configured for an IPv4 BGP session between the PE and the CE:
router bgp <Local AS>
address-family ipv4 vrf one
neighbor <neighbor IP> remote-as < Remote AS>
neighbor <neighbor IP> activate
To determine the software running on a Cisco product, log in to the device and issue the "show version" command to display the system banner. On the next line of output, the image name will be displayed between parentheses, followed by "Version" and the IOS release name. Other Cisco devices will not have the "show version" command or will give different output.
The following example identifies a Cisco product that is running Cisco IOS release 12.4(11)T2:
Router#show version
Cisco IOS Software, 7200 Software (C7200-ADVSECURITYK9-M), Version 12.4(11)T2, RELEASE SOFTWARE (fc4)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Tue 01-May-07 04:19 by prod_rel_team
<output truncated>
Additional information on the Cisco IOS release naming conventions can be found on the document entitled "White Paper: Cisco IOS Reference Guide", which is available at http://www.cisco.com/warp/public/620/1.html
Products Confirmed Not Vulnerable +--------------------------------
Cisco products not configured for MPLS VPNs or VRF Lite are unaffected by this vulnerability.
Cisco products that do not run IOS are unaffected by this vulnerability.
Cisco IOS-XR is not affected.
No other Cisco products are currently known to be affected by this vulnerability.
Details
MPLS VPNs allow for the creation of 'virtual networks' that customers can use to segregate traffic into multiple, isolated VPNs. Traffic within each MPLS VPN is kept separate from the others, thereby maintaining a virtual private network.
More information on MPLS and MPLS VPNs is available at the following link:
http://www.cisco.com/en/US/products/ps6557/products_ios_technology_home.html
A bug exists when processing extended communities with MPLS VPNs. If this occurs, traffic can leak from one MPLS VPN to another. The following two examples of this scenario are the most common:
1) MPLS VPN configuration with BGP running inside the VRF between the PE and CE devices.
2) MPLS Inter-AS option A with BGP running between the Autonomous System Border Routers (ASBR).
The mitigation in the Workarounds section filters extended communities on a PE device, preventing them from being received by devices configured for MPLS VPN. Cisco IOS images that do not include CSCee83237 are not vulnerable to this issue.
It is important to note that this condition cannot be triggered by an attacker and that the condition does not provide ways to determine the flow of traffic between VPNs.
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
CVSS Base Score - 5.1
Access Vector - Network
Access Complexity - High
Authentication - None
Confidentiality Impact - Partial
Integrity Impact - Partial
Availability Impact - Partial
CVSS Temporal Score - 4.2
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
This vulnerability may cause traffic to be improperly routed between MPLS VPNs, which may lead to a breach of confidentiality.
Software Versions and Fixes
When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.
Each row of the Cisco IOS software table (below) names a Cisco IOS release train. If a given release train is vulnerable, then the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerabilities at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table.
+-------------------------------------------------------------------+ | Major | Availability of Repaired Releases | | Release | | |--------------+----------------------------------------------------| | Affected | | Recommended | | 12.0-Based | First Fixed Release | Release | | Releases | | | |--------------+----------------------------------+-----------------| | 12.0 | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0DA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0DB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0DC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | 12.0(30)S5 | | | | | 12.0(32)S11 | | 12.0S | 12.0(31)S3 | | | | | 12.0(33)S1 | | | 12.0(32)S | | |--------------+----------------------------------+-----------------| | 12.0SC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0SL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0SP | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0ST | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | | 12.0(32)S11 | | 12.0SX | Vulnerable; first fixed in 12.0S | | | | | 12.0(33)S1 | |--------------+----------------------------------+-----------------| | 12.0SY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | | 12.0(32)S11 | | 12.0SZ | 12.0(30)SZ4 | | | | | 12.0(33)S1 | |--------------+----------------------------------+-----------------| | 12.0T | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0W | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0WC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0WT | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XH | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XI | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XJ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XK | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XM | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XN | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XQ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XR | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XS | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XT | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.0XV | Not Vulnerable | | |--------------+----------------------------------+-----------------| | Affected | | Recommended | | 12.1-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.1 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.2-Based | First Fixed Release | Release | | Releases | | | |--------------+----------------------------------+-----------------| | 12.2 | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2B | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2BC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2BW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2BX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2BY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2BZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2CX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2CY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2CZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2DA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2DD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2DX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2EW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2EWA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2EX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2EY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2EZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2FX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2FY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2FZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2IRB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2IXA | Vulnerable; migrate to any | 12.2(18)IXG | | | release in 12.2IXD | | |--------------+----------------------------------+-----------------| | 12.2IXB | Vulnerable; migrate to any | 12.2(18)IXG | | | release in 12.2IXD | | |--------------+----------------------------------+-----------------| | 12.2IXC | Vulnerable; migrate to any | 12.2(18)IXG | | | release in 12.2IXD | | |--------------+----------------------------------+-----------------| | 12.2IXD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2IXE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2IXF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2IXG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2JA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2JK | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2MB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2MC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | 12.2(30)S and later are | 12.2(33)SB2; | | 12.2S | vulnerable. 12.2(25)S and before | Available on | | | are not vulnerable | 26-SEP-08 | |--------------+----------------------------------+-----------------| | | 12.2(28)SB5 | | | | | 12.2(33)SB2; | | 12.2SB | 12.2(31)SB2 | Available on | | | | 26-SEP-08 | | | 12.2(31)SB3x | | |--------------+----------------------------------+-----------------| | | Vulnerable; first fixed in | 12.2(33)SB2; | | 12.2SBC | 12.2SB | Available on | | | | 26-SEP-08 | |--------------+----------------------------------+-----------------| | 12.2SCA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SEA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SEB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SEC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SED | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SEE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SEF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SEG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SG | 12.2(37)SG | 12.2(46)SG1 | |--------------+----------------------------------+-----------------| | 12.2SGA | 12.2(31)SGA8 | 12.2(31)SGA8 | |--------------+----------------------------------+-----------------| | 12.2SL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SM | 12.2(29)SM2 | 12.2(29)SM4 | |--------------+----------------------------------+-----------------| | 12.2SO | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SRA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SRB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SRC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SU | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SV | 12.2(29b)SV1 | | |--------------+----------------------------------+-----------------| | 12.2SVA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SVC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SVD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SXA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SXB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SXD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SXE | Vulnerable; first fixed in | 12.2(18)SXF15 | | | 12.2SXF | | |--------------+----------------------------------+-----------------| | 12.2SXF | 12.2(18)SXF3 | 12.2(18)SXF15 | |--------------+----------------------------------+-----------------| | 12.2SXH | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2SZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2T | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2TPC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XH | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XI | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XJ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XK | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XM | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XN | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XNA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XNB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XO | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XQ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XR | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XS | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XT | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XU | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XV | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2XW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YH | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YJ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YK | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YM | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YN | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YO | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YP | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YQ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YR | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YS | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YT | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YU | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YV | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2YZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZH | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZJ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZP | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZU | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | Vulnerable; first fixed in | 12.2(33)SB2; | | 12.2ZX | 12.2SB | Available on | | | | 26-SEP-08 | |--------------+----------------------------------+-----------------| | 12.2ZY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.2ZYA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | Affected | | Recommended | | 12.3-Based | First Fixed Release | Release | | Releases | | | |--------------+----------------------------------+-----------------| | 12.3 | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3B | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3BC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3BW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3EU | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3JA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3JEA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3JEB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3JEC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3JK | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3JL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3JX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | | 12.4(15)T7 | | 12.3T | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |--------------+----------------------------------+-----------------| | 12.3TPC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3VA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XE | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XI | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XJ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XK | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | | 12.4(15)T7 | | 12.3XL | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |--------------+----------------------------------+-----------------| | 12.3XQ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XR | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XS | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XU | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3XZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3YA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3YD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | Vulnerable; first fixed in | 12.3(14)YX13 | | 12.3YF | 12.3YX | | | | | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.3YG | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3YH | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3YI | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.3YJ | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.3YK | 12.3(11)YK3 | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | | | 12.3(14)YM13; | | 12.3YM | 12.3(14)YM10 | Available on | | | | 30-SEP-08 | |--------------+----------------------------------+-----------------| | 12.3YQ | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.3YS | 12.3(11)YS2 | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.3YT | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | | | 12.4(2)XB10 | | | Vulnerable; first fixed in | | | 12.3YU | 12.4XB | 12.4(9)XG3 | | | | | | | | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.3YX | 12.3(14)YX7 | 12.3(14)YX13 | |--------------+----------------------------------+-----------------| | 12.3YZ | 12.3(11)YZ2 | | |--------------+----------------------------------+-----------------| | 12.3ZA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | Affected | | Recommended | | 12.4-Based | First Fixed Release | Release | | Releases | | | |--------------+----------------------------------+-----------------| | | 12.4(10c) | | | | | | | | 12.4(12a) | | | | | | | | 12.4(13) | | | | | | | 12.4 | 12.4(3h) | 12.4(18c) | | | | | | | 12.4(5c) | | | | | | | | 12.4(7e) | | | | | | | | 12.4(8d) | | |--------------+----------------------------------+-----------------| | 12.4JA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4JK | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4JL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4JMA | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4JMB | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4JMC | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4JX | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4MD | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4MR | Not Vulnerable | | |--------------+----------------------------------+-----------------| | | | 12.4(15)SW2; | | 12.4SW | 12.4(11)SW1 | Available on | | | | 28-SEP-08 | |--------------+----------------------------------+-----------------| | | 12.4(11)T2 | | | | | | | | 12.4(15)T | | | | | | | | 12.4(2)T6 | | | 12.4T | | 12.4(15)T7 | | | 12.4(4)T8 | | | | | | | | 12.4(6)T7 | | | | | | | | 12.4(9)T3 | | |--------------+----------------------------------+-----------------| | 12.4XA | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.4XB | 12.4(2)XB6 | 12.4(2)XB10 | |--------------+----------------------------------+-----------------| | 12.4XC | 12.4(4)XC7 | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | | | 12.4(4)XD11; | | 12.4XD | 12.4(4)XD7 | Available on | | | | 26-SEP-08 | |--------------+----------------------------------+-----------------| | 12.4XE | 12.4(6)XE3 | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.4XF | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XG | 12.4(9)XG2 | 12.4(9)XG3 | |--------------+----------------------------------+-----------------| | 12.4XJ | 12.4(11)XJ2 | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.4XK | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.4XL | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XM | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XN | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XP | Vulnerable; contact TAC | | |--------------+----------------------------------+-----------------| | 12.4XQ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XR | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XT | 12.4(6)XT1 | 12.4(15)T7 | |--------------+----------------------------------+-----------------| | 12.4XV | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XW | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XY | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4XZ | Not Vulnerable | | |--------------+----------------------------------+-----------------| | 12.4YA | Not Vulnerable | | +-------------------------------------------------------------------+
Workarounds
Customers running versions of Cisco IOS that support filtering of extended communities can prevent the corruption of the route target (RT) by applying a BGP route-map that removes RT entries on inbound BGP sessions.
The following configuration example applied in the ipv4 address family of a PE device removes extended communities from the CE router:
router bgp <Local AS>
address-family ipv4 vrf one
neighbor <neighbor IP>
remote-as <Remote AS>
neighbor <neighbor IP>
activate neighbor <neighbor IP>
route-map FILTER in exit-address-family
!
ip extcommunity-list 100 permit _RT.*_
!
!
route-map FILTER permit 10
set extcomm-list 100 delete
!
The following configuration example applied in the ipv6 address family of a PE device removes extended communities from the CE router:
router bgp <Local AS>
address-family ipv6 vrf one
neighbor <neighbor IP>
remote-as <Remote AS>
neighbor <neighbor IP>
activate neighbor <neighbor IP>
route-map FILTER in exit-address-family
!
ip extcommunity-list 100 permit _RT.*_
!
!
route-map FILTER permit 10
set extcomm-list 100 delete
!
Note: The capability of filtering extended communities is only available in certain 12.0S and 12.2S based Cisco IOS releases.
BGP session between the PE and the CE needs to cleared to make this configuration change effective.
Obtaining Fixed Software
Cisco has released free software updates that address these vulnerabilities. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/products/prod_warranties_item09186a008088e31f.html or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@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/warp/public/687/Directory/DirTAC.shtml for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages.
Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.
This vulnerability cannot be deterministically triggered by an attacker.
Status of this Notice: FINAL
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.
Distribution
This advisory is posted on Cisco's worldwide website at :
http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.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 | | Initial | | 1.0 | 2008-Sep-24 | public | | | | release. | +---------------------------------------+
Cisco Security Procedures
Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (Darwin)
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Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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"data": "A \"logic error\" in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching (MPLS) VPN with extended communities is configured, sometimes causes a corrupted route target (RT) to be used, which allows remote attackers to read traffic from other VPNs in opportunistic circumstances. Cisco IOS (Internetwork Operating System) is an operating system commonly used on Cisco routers and network switches. \nThis vulnerability is tracked by Cisco Bug ID CSCee83237 and CVE-2008-3803. ----------------------------------------------------------------------\n\nDo you need accurate and reliable IDS / IPS / AV detection rules?\n\nGet in-depth vulnerability details:\nhttp://secunia.com/binary_analysis/sample_analysis/\n\n----------------------------------------------------------------------\n\nTITLE:\nCisco IOS Multiple Vulnerabilities\n\nSECUNIA ADVISORY ID:\nSA31990\n\nVERIFY ADVISORY:\nhttp://secunia.com/advisories/31990/\n\nCRITICAL:\nModerately critical\n\nIMPACT:\nExposure of sensitive information, DoS, System access\n\nWHERE:\n\u003eFrom remote\n\nOPERATING SYSTEM:\nCisco IOS R12.x\nhttp://secunia.com/advisories/product/50/\nCisco IOS 12.x\nhttp://secunia.com/advisories/product/182/\n\nDESCRIPTION:\nSome vulnerabilities have been reported in Cisco IOS, which can be\nexploited by malicious people to disclose sensitive information,\ncause a DoS (Denial of Service), or to compromise a vulnerable\nsystem. \n\n1) An unspecified error exists in the processing of SSL packets\nduring the termination of an SSL session, which can potentially be\nexploited to crash an affected system. \n\n2) Two unspecified errors exist within the processing of Protocol\nIndependent Multicast (PIM) packets, which can be exploited to cause\nan affected device to reload. \n\n3) Unspecified errors within the processing of segmented Skinny Call\nControl Protocol (SCCP) messages can be exploited to cause a Cisco\nIOS device to reload. \n\nSuccessful exploitation requires that the device is configured with\nNetwork Address Translation (NAT) SCCP Fragmentation Support. \n\n4) A memory leak in the processing of Session Initiation Protocol\n(SIP) messages can be exploited to cause a DoS for all voice\nservices. \n\n5) Multiple unspecified errors exist in the processing of SIP\nmessages, which can be exploited to cause a reload of an affected\ndevice. \n\n6) An unspecified error in the IOS Intrusion Prevention System (IPS)\nfeature when processing certain IPS signatures that use the\nSERVICE.DNS engine can be exploited to cause a DoS via specially\ncrafted network traffic. \n\nNOTE: This security issue was introduced with CSCee83237. \n\n8) An unspecified error within the Multi Protocol Label Switching\n(MPLS) Forwarding Infrastructure (MFI) can be exploited to cause a\nDoS via specially crafted network packets. \n\nSuccessful exploitation requires access to the MPLS network. \n\n9) An unspecified error within the Application Inspection Control\n(AIC) can be exploited to cause a reload of an affected device via\nspecially crafted HTTP packets. \n\n10) An unspecified error in the processing of Layer 2 Tunneling\nProtocol (L2TP) packets can be exploited to cause an affected device\nto reload via a specially crafted L2TP packets. \n\nSuccessful exploitation requires that the L2TP mgmt daemon process is\nrunning. This process may be enabled e.g. via Layer 2 virtual private\nnetworks (L2VPN), Layer 2 Tunnel Protocol Version 3 (L2TPv3), Stack\nGroup Bidding Protocol (SGBP), or Cisco Virtual Private Dial-Up\nNetworks (VPDN). \n\n11) An unspecified error exists in the processing of IPC messages. \nThis can be exploited to reload an affected device via a specially\ncrafted UDP packet sent to port 1975. \n\n12) A security issue is caused due to the device automatically\nenabling SNMP with a default community string, which can be exploited\nto gain control an affected system. \n\nSuccessful exploitation requires that a device is configured for\nlinecard redundancy. \n\nSOLUTION:\nUpdate to the fixed version (please see the vendor\u0027s advisories for\ndetails). \n\nPROVIDED AND/OR DISCOVERED BY:\nReported by the vendor. \n\nORIGINAL ADVISORY:\nCisco:\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml\n\n----------------------------------------------------------------------\n\nAbout:\nThis Advisory was delivered by Secunia as a free service to help\neverybody keeping their systems up to date against the latest\nvulnerabilities. \n\nSubscribe:\nhttp://secunia.com/advisories/secunia_security_advisories/\n\nDefinitions: (Criticality, Where etc.)\nhttp://secunia.com/advisories/about_secunia_advisories/\n\n\nPlease Note:\nSecunia recommends that you verify all advisories you receive by\nclicking the link. \nSecunia NEVER sends attached files with advisories. \nSecunia does not advise people to install third party patches, only\nuse those supplied by the vendor. \n\n----------------------------------------------------------------------\n\nUnsubscribe: Secunia Security Advisories\nhttp://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org\n\n----------------------------------------------------------------------\n\n\n. \n\nWorkarounds are available to help mitigate this vulnerability. \n\nThis issue is triggered by a logic error when processing extended\ncommunities on the PE device. \n\nThis issue cannot be deterministically exploited by an attacker. \n\nCisco has released free software updates that address these\nvulnerabilities. Workarounds that mitigate these vulnerabilities are\navailable. \n\nThis advisory is posted at \nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml\n\nNOTE: The September 24, 2008 IOS Advisory bundled publication\nincludes twelve Security Advisories. Eleven of the advisories address\nvulnerabilities in Cisco\u0027s IOS software, and one advisory addresses\nvulnerabilities in Cisco Unified Communications Manager. Each\nAdvisory lists the releases that correct the vulnerability described\nin the Advisory. Please reference the following software table to\nfind a release that fixes all published IOS software Advisories as of\nSeptember 24th, 2008:\n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-bundle.shtml\n\nIndividual publication links are listed below:\n\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-cucm.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml\n\nAffected Products\n=================\n\nProducts running Cisco IOS versions 12.0S, 12.2, 12.3 or 12.4 and\nconfigured for MPLS VPNs or VRF Lite are potentially affected. \n\nCisco IOS releases based on 12.1 are not affected. \n\nVulnerable Products\n+------------------\n\nCisco IOS devices are vulnerable if they are configured for MPLS VPN\nor VRF Lite and have a BGP session between the CE and PE devices, and\nprocess extended communities. If a device is configured for MPLS VPN\nor VRF Lite the command address-family ipv4 vrf \u003cvrf-name\u003e or\naddress-family ipv6 vrf \u003cvrf-name\u003e will be present in the device\nconfiguration. \n\nThe following shows a command executed on a device configured for\nMPLS VPN:\n\n router#show running-config | include address-family [ipv4|ipv6]\n\n address-family ipv4 vrf \u003cvrf-name\u003e\n\nThe following shows a PE device configured for an IPv4 BGP session\nbetween the PE and the CE:\n\n router bgp \u003cLocal AS\u003e\n address-family ipv4 vrf one\n neighbor \u003cneighbor IP\u003e remote-as \u003c Remote AS\u003e\n neighbor \u003cneighbor IP\u003e activate\n\nTo determine the software running on a Cisco product, log in to the\ndevice and issue the \"show version\" command to display the system\nbanner. On the next line of\noutput, the image name will be displayed between parentheses,\nfollowed by \"Version\" and the IOS release name. Other Cisco devices\nwill not have the \"show version\" command or will give different\noutput. \n\nThe following example identifies a Cisco product that is running\nCisco IOS release 12.4(11)T2:\n\n Router#show version\n Cisco IOS Software, 7200 Software (C7200-ADVSECURITYK9-M), Version 12.4(11)T2, RELEASE SOFTWARE (fc4)\n Technical Support: http://www.cisco.com/techsupport\n Copyright (c) 1986-2007 by Cisco Systems, Inc. \n Compiled Tue 01-May-07 04:19 by prod_rel_team\n\n \u003coutput truncated\u003e\n\nAdditional information on the Cisco IOS release naming conventions\ncan be found on the document entitled \"White Paper: Cisco IOS\nReference Guide\", which is available at \nhttp://www.cisco.com/warp/public/620/1.html\n\nProducts Confirmed Not Vulnerable\n+--------------------------------\n\nCisco products not configured for MPLS VPNs or VRF Lite are\nunaffected by this vulnerability. \n\nCisco products that do not run IOS are unaffected by this\nvulnerability. \n\nCisco IOS-XR is not affected. \n\nNo other Cisco products are currently known to be affected by this\nvulnerability. \n\nDetails\n=======\n\nMPLS VPNs allow for the creation of \u0027virtual networks\u0027 that customers\ncan use to segregate traffic into multiple, isolated VPNs. Traffic\nwithin each MPLS VPN is kept separate from the others, thereby\nmaintaining a virtual private network. \n\nMore information on MPLS and MPLS VPNs is available at the following\nlink:\n\nhttp://www.cisco.com/en/US/products/ps6557/products_ios_technology_home.html\n\nA bug exists when processing extended communities with MPLS VPNs. If this occurs,\ntraffic can leak from one MPLS VPN to another. \nThe following two examples of this scenario are the most common:\n\n1) MPLS VPN configuration with BGP running inside the VRF between the\nPE and CE devices. \n\n2) MPLS Inter-AS option A with BGP running between the Autonomous\nSystem Border Routers (ASBR). \n\nThe mitigation in the Workarounds section filters extended\ncommunities on a PE device, preventing them from being received by\ndevices configured for MPLS VPN. Cisco\nIOS images that do not include CSCee83237 are not vulnerable to this\nissue. \n\nIt is important to note that this condition cannot be triggered by an\nattacker and that the condition does not provide ways to determine\nthe flow of traffic between VPNs. \n\nVulnerability Scoring Details\n=============================\n\nCisco has provided scores for the vulnerabilities in this advisory\nbased on the Common Vulnerability Scoring System (CVSS). The CVSS\nscoring in this Security Advisory is done in accordance with CVSS\nversion 2.0. \n\nCVSS is a standards-based scoring method that conveys vulnerability\nseverity and helps determine urgency and priority of response. \n\nCisco has provided a base and temporal score. Customers can then\ncompute environmental scores to assist in determining the impact of\nthe vulnerability in individual networks. \n\nCisco has provided an FAQ to answer additional questions regarding\nCVSS at\n\nhttp://www.cisco.com/web/about/security/intelligence/cvss-qandas.html\n\nCisco has also provided a CVSS calculator to help compute the\nenvironmental impact for individual networks at\n\nhttp://intellishield.cisco.com/security/alertmanager/cvss \n\n\nCVSS Base Score - 5.1\n\n Access Vector - Network\n Access Complexity - High\n Authentication - None\n Confidentiality Impact - Partial\n Integrity Impact - Partial\n Availability Impact - Partial\n\nCVSS Temporal Score - 4.2\n\n Exploitability - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\n\nImpact\n======\n\nThis vulnerability may cause traffic to be improperly routed between\nMPLS VPNs, which may lead to a breach of confidentiality. \n\nSoftware Versions and Fixes\n===========================\n\nWhen considering software upgrades, also consult \nhttp://www.cisco.com/go/psirt and any subsequent advisories to \ndetermine exposure and a complete upgrade solution. \n\nIn all cases, customers should exercise caution to be certain the\ndevices to be upgraded contain sufficient memory and that current\nhardware and software configurations will continue to be supported\nproperly by the new release. If the information is not clear, contact\nthe Cisco Technical Assistance Center (TAC) or your contracted\nmaintenance provider for assistance. \n\nEach row of the Cisco IOS software table (below) names a Cisco IOS\nrelease train. If a given release train is vulnerable, then the\nearliest possible releases that contain the fix (along with the\nanticipated date of availability for each, if applicable) are listed\nin the \"First Fixed Release\" column of the table. The \"Recommended\nRelease\" column indicates the releases which have fixes for all the\npublished vulnerabilities at the time of this Advisory. A device\nrunning a release in the given train that is earlier than the release\nin a specific column (less than the First Fixed Release) is known to\nbe vulnerable. Cisco recommends upgrading to a release equal to or\nlater than the release in the \"Recommended Releases\" column of the\ntable. \n\n+-------------------------------------------------------------------+\n| Major | Availability of Repaired Releases |\n| Release | |\n|--------------+----------------------------------------------------|\n| Affected | | Recommended |\n| 12.0-Based | First Fixed Release | Release |\n| Releases | | |\n|--------------+----------------------------------+-----------------|\n| 12.0 | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0DA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0DB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0DC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | 12.0(30)S5 | |\n| | | 12.0(32)S11 |\n| 12.0S | 12.0(31)S3 | |\n| | | 12.0(33)S1 |\n| | 12.0(32)S | |\n|--------------+----------------------------------+-----------------|\n| 12.0SC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0SL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0SP | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0ST | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | | 12.0(32)S11 |\n| 12.0SX | Vulnerable; first fixed in 12.0S | |\n| | | 12.0(33)S1 |\n|--------------+----------------------------------+-----------------|\n| 12.0SY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | | 12.0(32)S11 |\n| 12.0SZ | 12.0(30)SZ4 | |\n| | | 12.0(33)S1 |\n|--------------+----------------------------------+-----------------|\n| 12.0T | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0W | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0WC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0WT | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XH | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XI | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XJ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XK | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XM | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XN | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XQ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XR | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XS | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XT | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.0XV | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| Affected | | Recommended |\n| 12.1-Based | First Fixed Release | Release |\n| Releases | | |\n|-------------------------------------------------------------------|\n| There are no affected 12.1 based releases |\n|-------------------------------------------------------------------|\n| Affected | | Recommended |\n| 12.2-Based | First Fixed Release | Release |\n| Releases | | |\n|--------------+----------------------------------+-----------------|\n| 12.2 | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2B | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2BC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2BW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2BX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2BY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2BZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2CX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2CY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2CZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2DA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2DD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2DX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2EW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2EWA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2EX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2EY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2EZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2FX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2FY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2FZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2IRB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2IXA | Vulnerable; migrate to any | 12.2(18)IXG |\n| | release in 12.2IXD | |\n|--------------+----------------------------------+-----------------|\n| 12.2IXB | Vulnerable; migrate to any | 12.2(18)IXG |\n| | release in 12.2IXD | |\n|--------------+----------------------------------+-----------------|\n| 12.2IXC | Vulnerable; migrate to any | 12.2(18)IXG |\n| | release in 12.2IXD | |\n|--------------+----------------------------------+-----------------|\n| 12.2IXD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2IXE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2IXF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2IXG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2JA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2JK | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2MB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2MC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | 12.2(30)S and later are | 12.2(33)SB2; |\n| 12.2S | vulnerable. 12.2(25)S and before | Available on |\n| | are not vulnerable | 26-SEP-08 |\n|--------------+----------------------------------+-----------------|\n| | 12.2(28)SB5 | |\n| | | 12.2(33)SB2; |\n| 12.2SB | 12.2(31)SB2 | Available on |\n| | | 26-SEP-08 |\n| | 12.2(31)SB3x | |\n|--------------+----------------------------------+-----------------|\n| | Vulnerable; first fixed in | 12.2(33)SB2; |\n| 12.2SBC | 12.2SB | Available on |\n| | | 26-SEP-08 |\n|--------------+----------------------------------+-----------------|\n| 12.2SCA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SEA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SEB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SEC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SED | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SEE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SEF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SEG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SG | 12.2(37)SG | 12.2(46)SG1 |\n|--------------+----------------------------------+-----------------|\n| 12.2SGA | 12.2(31)SGA8 | 12.2(31)SGA8 |\n|--------------+----------------------------------+-----------------|\n| 12.2SL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SM | 12.2(29)SM2 | 12.2(29)SM4 |\n|--------------+----------------------------------+-----------------|\n| 12.2SO | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SRA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SRB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SRC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SU | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SV | 12.2(29b)SV1 | |\n|--------------+----------------------------------+-----------------|\n| 12.2SVA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SVC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SVD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SXA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SXB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SXD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SXE | Vulnerable; first fixed in | 12.2(18)SXF15 |\n| | 12.2SXF | |\n|--------------+----------------------------------+-----------------|\n| 12.2SXF | 12.2(18)SXF3 | 12.2(18)SXF15 |\n|--------------+----------------------------------+-----------------|\n| 12.2SXH | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2SZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2T | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2TPC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XH | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XI | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XJ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XK | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XM | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XN | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XNA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XNB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XO | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XQ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XR | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XS | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XT | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XU | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XV | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2XW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YH | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YJ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YK | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YM | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YN | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YO | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YP | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YQ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YR | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YS | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YT | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YU | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YV | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2YZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZH | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZJ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZP | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZU | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | Vulnerable; first fixed in | 12.2(33)SB2; |\n| 12.2ZX | 12.2SB | Available on |\n| | | 26-SEP-08 |\n|--------------+----------------------------------+-----------------|\n| 12.2ZY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.2ZYA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| Affected | | Recommended |\n| 12.3-Based | First Fixed Release | Release |\n| Releases | | |\n|--------------+----------------------------------+-----------------|\n| 12.3 | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3B | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3BC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3BW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3EU | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3JA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3JEA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3JEB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3JEC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3JK | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3JL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3JX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | | 12.4(15)T7 |\n| 12.3T | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|--------------+----------------------------------+-----------------|\n| 12.3TPC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3VA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XE | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XI | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XJ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XK | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | | 12.4(15)T7 |\n| 12.3XL | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|--------------+----------------------------------+-----------------|\n| 12.3XQ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XR | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XS | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XU | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3XZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3YA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3YD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | Vulnerable; first fixed in | 12.3(14)YX13 |\n| 12.3YF | 12.3YX | |\n| | | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.3YG | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3YH | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3YI | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.3YJ | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.3YK | 12.3(11)YK3 | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| | | 12.3(14)YM13; |\n| 12.3YM | 12.3(14)YM10 | Available on |\n| | | 30-SEP-08 |\n|--------------+----------------------------------+-----------------|\n| 12.3YQ | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.3YS | 12.3(11)YS2 | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.3YT | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| | | 12.4(2)XB10 |\n| | Vulnerable; first fixed in | |\n| 12.3YU | 12.4XB | 12.4(9)XG3 |\n| | | |\n| | | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.3YX | 12.3(14)YX7 | 12.3(14)YX13 |\n|--------------+----------------------------------+-----------------|\n| 12.3YZ | 12.3(11)YZ2 | |\n|--------------+----------------------------------+-----------------|\n| 12.3ZA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| Affected | | Recommended |\n| 12.4-Based | First Fixed Release | Release |\n| Releases | | |\n|--------------+----------------------------------+-----------------|\n| | 12.4(10c) | |\n| | | |\n| | 12.4(12a) | |\n| | | |\n| | 12.4(13) | |\n| | | |\n| 12.4 | 12.4(3h) | 12.4(18c) |\n| | | |\n| | 12.4(5c) | |\n| | | |\n| | 12.4(7e) | |\n| | | |\n| | 12.4(8d) | |\n|--------------+----------------------------------+-----------------|\n| 12.4JA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4JK | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4JL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4JMA | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4JMB | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4JMC | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4JX | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4MD | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4MR | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| | | 12.4(15)SW2; |\n| 12.4SW | 12.4(11)SW1 | Available on |\n| | | 28-SEP-08 |\n|--------------+----------------------------------+-----------------|\n| | 12.4(11)T2 | |\n| | | |\n| | 12.4(15)T | |\n| | | |\n| | 12.4(2)T6 | |\n| 12.4T | | 12.4(15)T7 |\n| | 12.4(4)T8 | |\n| | | |\n| | 12.4(6)T7 | |\n| | | |\n| | 12.4(9)T3 | |\n|--------------+----------------------------------+-----------------|\n| 12.4XA | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.4XB | 12.4(2)XB6 | 12.4(2)XB10 |\n|--------------+----------------------------------+-----------------|\n| 12.4XC | 12.4(4)XC7 | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| | | 12.4(4)XD11; |\n| 12.4XD | 12.4(4)XD7 | Available on |\n| | | 26-SEP-08 |\n|--------------+----------------------------------+-----------------|\n| 12.4XE | 12.4(6)XE3 | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.4XF | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XG | 12.4(9)XG2 | 12.4(9)XG3 |\n|--------------+----------------------------------+-----------------|\n| 12.4XJ | 12.4(11)XJ2 | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.4XK | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.4XL | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XM | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XN | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XP | Vulnerable; contact TAC | |\n|--------------+----------------------------------+-----------------|\n| 12.4XQ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XR | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XT | 12.4(6)XT1 | 12.4(15)T7 |\n|--------------+----------------------------------+-----------------|\n| 12.4XV | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XW | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XY | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4XZ | Not Vulnerable | |\n|--------------+----------------------------------+-----------------|\n| 12.4YA | Not Vulnerable | |\n+-------------------------------------------------------------------+\n\nWorkarounds\n===========\n\nCustomers running versions of Cisco IOS that support filtering of\nextended communities can prevent the corruption of the route target\n(RT) by applying a BGP route-map that removes RT entries on inbound\nBGP sessions. \n\nThe following configuration example applied in the ipv4 address\nfamily of a PE device removes extended communities from the CE\nrouter:\n\n router bgp \u003cLocal AS\u003e\n address-family ipv4 vrf one\n neighbor \u003cneighbor IP\u003e\n remote-as \u003cRemote AS\u003e\n neighbor \u003cneighbor IP\u003e\n activate neighbor \u003cneighbor IP\u003e\n route-map FILTER in exit-address-family\n !\n ip extcommunity-list 100 permit _RT.*_\n !\n !\n route-map FILTER permit 10\n set extcomm-list 100 delete\n !\n\nThe following configuration example applied in the ipv6 address\nfamily of a PE device removes extended communities from the CE\nrouter:\n\n router bgp \u003cLocal AS\u003e\n address-family ipv6 vrf one\n neighbor \u003cneighbor IP\u003e\n remote-as \u003cRemote AS\u003e\n neighbor \u003cneighbor IP\u003e\n activate neighbor \u003cneighbor IP\u003e\n route-map FILTER in exit-address-family\n !\n ip extcommunity-list 100 permit _RT.*_\n !\n !\n route-map FILTER permit 10\n set extcomm-list 100 delete\n !\n\nNote: The capability of filtering extended communities is only\navailable in certain 12.0S and 12.2S based Cisco IOS releases. \n\nBGP session between the PE and the CE needs to cleared to make this\nconfiguration change effective. \n\nObtaining Fixed Software\n========================\n\nCisco has released free software updates that address these\nvulnerabilities. Prior to deploying software, customers should\nconsult their maintenance provider or check the software for feature\nset compatibility and known issues specific to their environment. \n\nCustomers may only install and expect support for the feature sets\nthey have purchased. By installing, downloading, accessing or\notherwise using such software upgrades, customers agree to be bound\nby the terms of Cisco\u0027s software license terms found at \nhttp://www.cisco.com/en/US/products/prod_warranties_item09186a008088e31f.html\nor as otherwise set forth at Cisco.com Downloads at \nhttp://www.cisco.com/public/sw-center/sw-usingswc.shtml\n\nDo not contact psirt@cisco.com or security-alert@cisco.com for\nsoftware upgrades. \n\nCustomers with Service Contracts\n+-------------------------------\n\nCustomers with contracts should obtain upgraded software through\ntheir regular update channels. For most customers, this means that\nupgrades should be obtained through the Software Center on Cisco\u0027s\nworldwide website at http://www.cisco.com. \n\nCustomers using Third Party Support Organizations\n+------------------------------------------------\n\nCustomers whose Cisco products are provided or maintained through\nprior or existing agreements with third-party support organizations,\nsuch as Cisco Partners, authorized resellers, or service providers\nshould contact that support organization for guidance and assistance\nwith the appropriate course of action in regards to this advisory. \n\nThe effectiveness of any workaround or fix is dependent on specific\ncustomer situations, such as product mix, network topology, traffic\nbehavior, and organizational mission. Due to the variety of affected\nproducts and releases, customers should consult with their service\nprovider or support organization to ensure any applied workaround or\nfix is the most appropriate for use in the intended network before it\nis deployed. \n\nCustomers without Service Contracts\n+----------------------------------\n\nCustomers who purchase direct from Cisco but do not hold a Cisco\nservice contract, and customers who purchase through third-party\nvendors but are unsuccessful in obtaining fixed software through\ntheir point of sale should acquire upgrades by contacting the Cisco\nTechnical Assistance Center (TAC). TAC contacts are as follows. \n\n * +1 800 553 2447 (toll free from within North America)\n * +1 408 526 7209 (toll call from anywhere in the world)\n * e-mail: tac@cisco.com\n\nCustomers should have their product serial number available and be\nprepared to give the URL of this notice as evidence of entitlement to\na free upgrade. Free upgrades for non-contract customers must be\nrequested through the TAC. \n\nRefer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml\nfor additional TAC contact information, including localized telephone\nnumbers, and instructions and e-mail addresses for use in various\nlanguages. \n\nExploitation and Public Announcements\n=====================================\n\nThe Cisco PSIRT is not aware of any public announcements or malicious\nuse of the vulnerability described in this advisory. \n\nThis vulnerability cannot be deterministically triggered by an\nattacker. \n\nStatus of this Notice: FINAL\n============================\n\nTHIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY\nKIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF\nMERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE\nINFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS\nAT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS\nDOCUMENT AT ANY TIME. \n\nA stand-alone copy or Paraphrase of the text of this document that\nomits the distribution URL in the following section is an\nuncontrolled copy, and may lack important information or contain\nfactual errors. \n\nDistribution\n============\n\nThis advisory is posted on Cisco\u0027s worldwide website at :\n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml\n\nIn addition to worldwide web posting, a text version of this notice\nis clear-signed with the Cisco PSIRT PGP key and is posted to the\nfollowing e-mail and Usenet news recipients. \n\n * cust-security-announce@cisco.com\n * first-bulletins@lists.first.org\n * bugtraq@securityfocus.com\n * vulnwatch@vulnwatch.org\n * cisco@spot.colorado.edu\n * cisco-nsp@puck.nether.net\n * full-disclosure@lists.grok.org.uk\n * comp.dcom.sys.cisco@newsgate.cisco.com\n\nFuture updates of this advisory, if any, will be placed on Cisco\u0027s\nworldwide website, but may or may not be actively announced on\nmailing lists or newsgroups. Users concerned about this problem are\nencouraged to check the above URL for any updates. \n\nRevision History\n================\n\n+---------------------------------------+\n| Revision | | Initial |\n| 1.0 | 2008-Sep-24 | public |\n| | | release. |\n+---------------------------------------+\n\nCisco Security Procedures\n=========================\n\nComplete information on reporting security vulnerabilities in Cisco\nproducts, obtaining assistance with security incidents, and\nregistering to receive security information from Cisco, is available\non Cisco\u0027s worldwide website at \nhttp://www.cisco.com/en/US/products/products_security_vulnerability_policy.html\nThis includes instructions for press inquiries regarding Cisco security notices. \nAll Cisco security advisories are available at \nhttp://www.cisco.com/go/psirt\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.8 (Darwin)\n\niEYEARECAAYFAkjaLeoACgkQ86n/Gc8U/uCNwQCdEOd3v5A+paECb9s2gMBUr0JH\nDEwAnRtvu3aQrECRin/QmElp7oudHZJX\n=EVLU\n-----END PGP SIGNATURE-----\n\n_______________________________________________\nFull-Disclosure - We believe in it. \nCharter: http://lists.grok.org.uk/full-disclosure-charter.html\nHosted and sponsored by Secunia - http://secunia.com/\n",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.