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Cisco Security Advisory

Cisco IOS Internet Key Exchange Vulnerability

Advisory ID: cisco-sa-20120328-ike

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-ike

Revision 1.0

For Public Release 2012 March 28 16:00  UTC (GMT)


Summary

The Cisco IOS Software Internet Key Exchange (IKE) feature contains a  denial of service (DoS) vulnerability.

Cisco has released free software updates that address this vulnerability.

This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-ike

Note: The March 28, 2012, Cisco IOS Software Security Advisory bundled publication includes nine Cisco Security Advisories. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the March 2012 bundled publication.

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

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar12.html


Affected Products


Vulnerable Products

Cisco devices that are running Cisco IOS Software are vulnerable when they are configured to use IKE version 1 (IKEv1).

A number of features use IKEv1, including different Virtual Private Networks (VPN) such as:

  • LAN-to-LAN VPN
  • Remote access VPN (excluding SSLVPN)
  • Dynamic Multipoint VPN (DMVPN)
  • Group Domain of Interpretation (GDOI)
There are two methods to determine if a device is configured for IKE:
  • Determine if IKE ports are open on a running device
  • Determine if IKE features are included in the device configuration

Determine if IKE Ports are Open on a Running Device

The preferred method to determine if a device has been configured for IKE is to issue the show ip sockets or show udp EXEC command. If the device has UDP port 500, UDP port 4500, UDP port 848, or UDP port 4848 open, it is processing IKE packets.

In the following example, the device is processing IKE packets in UDP port 500 and UDP port 4500, using either IPv4 or IPv6:

router# show udp
Proto        Remote      Port      Local       Port  In Out  Stat TTY OutputIF
 17       --listen--          192.168.130.21    500   0   0 1001011   0 
 17(v6)   --listen--          UNKNOWN           500   0   0 1020011   0 
 17       --listen--          192.168.130.21   4500   0   0 1001011   0 
 17(v6)   --listen--          UNKNOWN          4500   0   0 1020011   0 
!--- Output truncated
router#

Determine if IKE Features are included in the Device Configuration

To determine if a Cisco IOS device configuration is vulnerable, the administrator needs to establish whether  there is at least one configured feature that uses IKE. This can be achieved by using the show run | include crypto map|tunnel protection ipsec|crypto gdoi enable mode command. If the output of this command contains either crypto map, tunnel protection ipsec, or,  crypto gdoi then  the device contains an IKE configuration. The following example shows a device that has been configured for IKE:
router# show run | include crypto map|tunnel protection ipsec|crypto gdoi
crypto map CM 100 ipsec-isakmp 
 crypto map CM
router#

Determine the Cisco IOS Software Release

To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the show version command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the show version command or may provide different output.

The following example identifies a Cisco product that is running Cisco IOS Software Release 15.0(1)M1 with an installed image name of C3900-UNIVERSALK9-M:

Router> show version 
Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 17:17 by prod_rel_team
!--- output truncated 

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

Products Confirmed Not Vulnerable

Cisco ASA 5500 Series Adaptive Security Appliance is not affected by this vulnerability.

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

Details

The IKE protocol is used in the Internet Protocol Security (IPsec) protocol suite to negotiate cryptographic attributes that will be used to encrypt or authenticate the communication session. These attributes include cryptographic algorithm, mode, and shared keys. The end result of IKE is a shared session secret that will be used to derive cryptographic keys.

Cisco IOS Software supports IKE for IPv4 and IPv6 communications.  IKE communication can use any of the following UDP ports:

  • UDP port 500
  • UDP port 4500, NAT Traversal (NAT-T)
  • UDP port 848,  Group Domain of Interpretation (GDOI)
  • UDP port 4848, GDOI NAT-T

The IKEv1 feature of Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a reload of an affected device.

An attacker could exploit this vulnerability using either IPv4 or IPv6 on any of the listed UDP ports. Spoofing of packets that could exploit this vulnerability is limited because the attacker needs to either receive or have access to the initial response from the vulnerable device.

This vulnerability is documented in Cisco bug ID CSCts38429  and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2012-0381.

Vulnerability Scoring Details

Cisco has scored the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this security advisory is in accordance with CVSS version 2.0.

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

Cisco has provided a base and temporal score. Customers can also compute environmental scores that help determine the impact of the vulnerability in their own networks.

Cisco has provided additional information regarding CVSS at the following link:

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

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

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


CSCts38429 - Cisco IOS Software IKE DoS vulnerability CSCts38429

Calculate the environmental score of CSCts38429

CVSS Base Score - 7.8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

None

None

Complete

CVSS Temporal Score - 6.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

Impact

Successful exploitation of the vulnerability may cause the vulnerable device to reload.

Software Versions and Fixes

Cisco IOS Software

Each row of the following Cisco IOS Software table corresponds to a Cisco IOS Software train. If a particular train is vulnerable, the earliest releases that contain the fix are listed in the First Fixed Release column. The First Fixed Release for All Advisories in the March 2012 Bundled Publication column lists the earliest possible releases that correct all the published vulnerabilities in the Cisco IOS Software Security Advisory bundled publication. Cisco recommends upgrading to the latest available release, where possible.

The Cisco IOS Software Checker allows customers to search for Cisco Security Advisories that address specific Cisco IOS Software releases. This tool is available on the Cisco Security Intelligence Operations (SIO) portal at http://tools.cisco.com/security/center/selectIOSVersion.x


Major Release      Availability of Repaired Releases
Affected 12.0-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
There are no affected 12.0 based releases
Affected 12.2-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
12.2 Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2B Vulnerable; First fixed in Release 15.0M
Releases up to and including 12.2(2)B7 are not vulnerable.
Vulnerable; First fixed in Release 15.0M
12.2BC Vulnerable; First fixed in Release 15.0M
Releases up to and including 12.2(4)BC1b are not vulnerable.
Vulnerable; First fixed in Release 15.0M
12.2BW Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2BX Vulnerable; First fixed in Release 12.2SRE
Releases up to and including 12.2(2)BX1 are not vulnerable.
Vulnerable; First fixed in Release 12.2SB
12.2BY Vulnerable; First fixed in Release 15.0M
Releases up to and including 12.2(2)BY3 are not vulnerable.
Vulnerable; First fixed in Release 15.0M
12.2BZ Vulnerable; First fixed in Release 15.0M
Releases up to and including 12.2(4)BZ2 are not vulnerable.
Vulnerable; First fixed in Release 15.0M
12.2CX Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2CY Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2CZ Vulnerable; migrate to any release in 12.0S
Vulnerable; First fixed in Release 12.0S
12.2DA Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2DD Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2DX Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2EU Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2EW Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2EWA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2EX Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2EY Not vulnerable
12.2(52)EY4
12.2EZ Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2FX Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2FY Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2FZ Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2IRA Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRB Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRC Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRD Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRE Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRF Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2IRG Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IRH Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXE Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXF Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXG Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2IXH Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2JA Not vulnerable
Not vulnerable
12.2JK Not vulnerable
Not vulnerable
12.2MB Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2MC Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2MRA Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2MRB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2S Note: Releases prior to 12.2(25)S1 are vulnerable; Releases 12.2(25)S1 and later are not vulnerable.
Releases prior to 12.2(30)S are vulnerable; Releases 12.2(30)S and later are not vulnerable. First fixed in Release 12.0S
12.2SB Only releases 12.2(33)SB1 through 12.2(33)SB4 are vulnerable.
12.2(33)SB12
12.2SBC Not vulnerable
Vulnerable; First fixed in Release 12.2SRE
12.2SCA Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCB Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCC Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCD Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.2SCE 12.2(33)SCE6
12.2(33)SCE6
12.2SCF 12.2(33)SCF2
12.2(33)SCF2
12.2SE Not vulnerable*

12.2(55)SE5 *
12.2SEA Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SEB Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SEC Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SED Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SEE Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SEF Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SEG Not vulnerable
Vulnerable; First fixed in Release 15.0SE
12.2SG Not vulnerable
12.2(53)SG7; Available on 07-MAY-12
12.2SGA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SL Not vulnerable
Not vulnerable
12.2SM Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SO Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SQ Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SRA Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2SRB Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2SRC Vulnerable; First fixed in Release 12.2SRD
Vulnerable; First fixed in Release 12.2SRE
12.2SRD 12.2(33)SRD8
Vulnerable; First fixed in Release 12.2SRE
12.2SRE 12.2(33)SRE6
12.2(33)SRE6
12.2STE Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SU Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2SV Not vulnerable
Releases up to and including 12.2(18)SV2 are not vulnerable.
12.2SVA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SVC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SVD Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SVE Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SW Releases up to and including 12.2(21)SW1 are not vulnerable.
Releases 12.2(25)SW10 and later are not vulnerable. First fixed in Release 12.4T
Vulnerable; First fixed in Release 12.4T
12.2SX Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXE Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXF Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXH Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2SXI 12.2(33)SXI9
12.2(33)SXI9
12.2SXJ 12.2(33)SXJ2
12.2(33)SXJ2
12.2SY 12.2(50)SY2; Available on 11-JUN-12
12.2(50)SY2; Available on 11-JUN-12
12.2SZ Not vulnerable
Vulnerable; First fixed in Release 12.0S
12.2T Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2TPC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2XA Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XB Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XC Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XD Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XE Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XF Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.2XG Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XH Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XI Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XJ Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XK Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XL Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XM Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XNA Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNB Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNC Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XND Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNE Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XNF Please see Cisco IOS-XE Software Availability
Please see Cisco IOS-XE Software Availability
12.2XO Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2XQ Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XR Not vulnerable
Releases prior to 12.2(15)XR are vulnerable; Releases 12.2(15)XR and later are not vulnerable. First fixed in Release 15.0M
12.2XS Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XT Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XU Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XV Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2XW Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2YA Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2YC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YE Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YK Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YO Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YP Not vulnerable
Vulnerable; First fixed in Release 15.0M
Releases up to and including 12.2(8)YP are not vulnerable.
12.2YT Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YW Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YX Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YY Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2YZ Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZB Releases up to and including 12.2(8)ZB are not vulnerable.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZE Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2ZH Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.2ZJ Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZP Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZU Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZX Not vulnerable
Vulnerable; First fixed in Release 12.2SRE
12.2ZY Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.2ZYA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Affected 12.3-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
12.3 Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3B Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3BC Vulnerable; First fixed in Release 12.2SCE
Vulnerable; First fixed in Release 12.2SCE
12.3BW Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.3JA Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.3JEA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JEB Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JEC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JED Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JK Releases up to and including 12.3(2)JK3 are not vulnerable.
Releases 12.3(8)JK1 and later are not vulnerable. First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3JL Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3JX Not vulnerable
Not vulnerable
12.3T Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3TPC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3VA Not vulnerable
Not vulnerable
12.3XA Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3XC Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XD Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XE Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XF Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3XG Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XI Vulnerable; First fixed in Release 12.2SRE
Vulnerable; First fixed in Release 12.2SRE
12.3XJ Vulnerable; migrate to any release in 12.4XN
Vulnerable; First fixed in Release 15.0M
12.3XK Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XL Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3XQ Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XR Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XU Vulnerable; First fixed in Release 12.4T
Releases up to and including 12.3(8)XU1 are not vulnerable.
Vulnerable; First fixed in Release 12.4T
12.3XW Vulnerable; migrate to any release in 12.4XN
Vulnerable; First fixed in Release 15.0M
12.3XX Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.3XY Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.3XZ Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.3YD Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YF Vulnerable; migrate to any release in 12.4XN
Vulnerable; First fixed in Release 15.0M
12.3YG Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YI Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YJ Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.3YK Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YM Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.3YQ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YS Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YT Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YU Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.3YX Vulnerable; migrate to any release in 12.4XN
Vulnerable; First fixed in Release 15.0M
12.3YZ Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.3ZA Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
Affected 12.4-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
12.4 Vulnerable; First fixed in Release 15.0M
Vulnerable; First fixed in Release 15.0M
12.4GC Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JA Not vulnerable
12.4(23c)JA4
12.4(25e)JA
12.4JAX Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4JDA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JDC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JDD Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JDE Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JHA Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JHB Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JHC Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JK Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JL Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4JX Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4JY Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4JZ Not vulnerable
Vulnerable; First fixed in Release 12.4JA
12.4MD 12.4(22)MD3; Available on 30-MAR-12
12.4(22)MD3; Available on 30-MAR-12
12.4MDA 12.4(24)MDA11
12.4(24)MDA11
12.4MDB 12.4(24)MDB5a
12.4(24)MDB5a
12.4MDC Not vulnerable
Not vulnerable
12.4MR Releases up to and including 12.4(9)MR are not vulnerable.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4MRA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4MRB Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4SW Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4T 12.4(15)T17
12.4(24)T7
12.4(15)T17
12.4(24)T7

12.4XA Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XB Releases prior to 12.4(2)XB12 are vulnerable; Releases 12.4(2)XB12 and later are not vulnerable. First fixed in Release 12.4T
Vulnerable; First fixed in Release 12.4T
12.4XC Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XD Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XE Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XF Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XG Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.4XJ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XK Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XL Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XM Not vulnerable
Vulnerable; First fixed in Release 15.0M
12.4XN Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XP Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XQ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XR Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 12.4T
12.4XT Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XV Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4XW Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XY Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4XZ Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4YA Vulnerable; First fixed in Release 12.4T
Vulnerable; First fixed in Release 15.0M
12.4YB Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4YD Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.4YE 12.4(24)YE3d
12.4(24)YE3d
12.4YG 12.4(24)YG4
12.4(24)YG4
Affected 15.0-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
15.0M 15.0(1)M8
15.0(1)M8
15.0MR Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.0MRA Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.0S 15.0(1)S5
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.0(1)S5
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.0SA Not vulnerable
Not vulnerable
15.0SE Not vulnerable
15.0(1)SE1
15.0SG Not vulnerable
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.0(2)SG2
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.0SY 15.0(1)SY1
15.0(1)SY1
15.0XA Vulnerable; First fixed in Release 15.1T
Vulnerable; First fixed in Release 15.1T
15.0XO Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
Affected 15.1-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
15.1EY Not vulnerable
15.1(2)EY2
15.1GC 15.1(2)GC2
15.1(2)GC2
15.1M 15.1(4)M3

15.1(4)M4; Available on 30-MAR-12
15.1MR Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.1S 15.1(3)S2
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.1(3)S2
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.1SG Not vulnerable
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
Not vulnerable
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.1SNG Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
15.1SNH Not vulnerable
Not vulnerable
15.1T 15.1(1)T5; Available on 18-MAY-12
15.1(2)T5; Available on 27-APR-12
15.1(3)T3
15.1(3)T3
15.1XB Vulnerable; First fixed in Release 15.1T
Vulnerable; First fixed in Release 15.1T
Affected 15.2-Based Releases First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
15.2GC 15.2(1)GC2
15.2(1)GC2
15.2S 15.2(1)S1

Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.2(1)S1

Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
15.2T 15.2(1)T2
15.2(2)T1
15.2(3)T; Available on 30-MAR-12
15.2(1)T2
15.2(2)T1
15.2(3)T; Available on 30-MAR-12

* Cisco Catalyst 3550 Series Switches support the Internet Key Exchange (IKE) feature and are vulnerable to Cisco bug ID CSCts38429 when the devices are running Layer 3 images; however, this product reached the End of Software Maintenance milestone.  Cisco 3550 Series SMI Switches that are running Layer 2 images do not support IKE and are not vulnerable.  No other Cisco devices that run 12.2SE-based software are vulnerable.

Cisco IOS XE Software

Cisco IOS XE Software Release First Fixed Release First Fixed Release for All Advisories in the March 2012 Cisco IOS Software Security Advisory Bundled Publication
2.1.x Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.2.x Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.3.x Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.4.x Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.5.x Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
2.6.x Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
3.1.xS Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
3.1.xSG Not vulnerable Vulnerable; migrate to 3.2.2SG or later.
3.2.xS Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
3.2.xSG 3.2.2SG 3.2.2SG
3.3.xS Vulnerable; migrate to 3.4.2S or later. Vulnerable; migrate to 3.4.2S or later.
3.3.xSG Not Vulnerable Not Vulnerable
3.4.xS 3.4.2S 3.4.2S
3.5.xS 3.5.1S 3.5.1S
3.6.xS Not vulnerable Not vulnerable
For a mapping of Cisco IOS XE Software releases to Cisco IOS Software releases, refer to Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S Release Notes, and Cisco IOS XE 3SG Release Notes.

Cisco IOS XR Software

Cisco IOS XR Software is not affected by any of the vulnerabilities disclosed in the March 2012 Cisco IOS Software Security Advisory Bundled Publication.


Workarounds

There are no workarounds for this vulnerability.

Obtaining Fixed Software

Cisco has released free software updates that address the vulnerability described in this advisory. Prior to deploying software, customers are advised to consult their maintenance providers or check the software for feature set compatibility and known issues that are specific to their environments.

Customers may only install and expect support for feature sets they have purchased. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html, or as set forth 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, upgrades should be obtained through the Software Center on Cisco.com at http://www.cisco.com.

Customers Using Third-Party Support Organizations

Customers with Cisco products that 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 organization for assistance with the appropriate course of action.

The effectiveness of any workaround or fix depends on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Because of the variety of affected products and releases, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed.

Customers Without Service Contracts

Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco Technical Assistance Center (TAC):

  • +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 the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Customers without service contracts should request free upgrades through the TAC.

Refer to Cisco Worldwide Contacts at http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, instructions, and e-mail addresses for support in various languages.

Exploitation and Public Announcements

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

This vulnerability was found during internal  Cisco testing.

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 Security Intelligence Operations at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-ike

Additionally, a text version of this advisory is clear signed with the Cisco PSIRT PGP key and circulated among the following e-mail addresses:

  • 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

Future updates of this advisory, if any, will reside on Cisco.com but may not be announced on mailing lists. Users can monitor this advisory's URL for any updates.


Revision History

Revision 1.0 2012-March-28 Initial public release.

Cisco Security Procedures

Complete information about reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco is available on Cisco.com at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This web page includes instructions for press inquiries regarding Cisco Security Advisories. All Cisco Security Advisories are available at http://www.cisco.com/go/psirt.


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