Products & Services

Contents

Summary
Affected Products
Details
Vulnerability Scoring Details
Impact
Software Versions and Fixes
Workarounds
Obtaining Fixed Software
Exploitation and Public Announcements
Status of this Notice: Final
Distribution
Revision History
Cisco Security Procedures

Vulnerable Products

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 

Products Confirmed Not Vulnerable

Cisco has scored the vulnerability 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

When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.

In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

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

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.

1. Verify the list of all session modules.

   Router# show ip http server session-module
   HTTP server application session modules:
   Session module Name  Handle Status   Secure-status  Description
   HTTP_IFS              1      Active   Active         HTTP based IOS File Server
   HOME_PAGE             2      Active   Active         IOS Homepage Server
   QDM                   3      Active   Active         QOS Device Manager Server
   QDM_SA                4      Active   Active         QOS Device Manager Signed Applet Server
   WEB_EXEC              5      Active   Active         HTTP based IOS EXEC Server
   IXI                   6      Active   Active         IOS XML Infra Application Server
   IDCONF                7      Active   Active         IDCONF HTTP(S) Server
   XSM                   8      Active   Active         XML Session Manager
   VDM                   9      Active   Active         VPN Device Manager Server
   XML_Api               10     Active   Active         XML Api
   ITS                   11     Active   Active         IOS Telephony Service
   ITS_LOCDIR            12     Active   Active         ITS Local Directory Search
   CME_SERVICE_URL       13     Active   Active         CME Service URL
   CME_AUTH_SRV_LOGIN    14     Active   Active         CME Authentication Server
   IPS_SDEE              15     Active   Active         IOS IPS SDEE Server
   tti-petitioner        16     Active   Active         TTI Petitioner

2. Create a list of session modules that are required, in this example it would be everything other than WEB_EXEC.

   Router# configuration terminal
   Router(config)# ip http session-module-list exclude_webexec 
   
   HTTP_IFS,HOME_PAGE,QDM,QDM_SA,IXI,IDCONF,XSM,VDM,XML_Api,
   ITS,ITS_LOCDIR,CME_SERVICE_URL,CME_AUTH_SRV_LOGIN,IPS_SDEE,tti-petitioner

3. Selectively enable HTTP/HTTPS applications that will service incoming HTTP requests from remote clients.

   Router(config)# ip http active-session-modules exclude_webexec
   Router(config)# ip http secure-active-session-modules exclude_webexec
   Router(config)# exit

4. Verify the list of all session modules, and ensure WEB_EXEC is not active.

   Router# show ip http server session-module 
   HTTP server application session modules: 
   Session module Name  Handle Status   Secure-status  Description 
   HTTP_IFS              1      Active   Active         HTTP based IOS File Server 
   HOME_PAGE             2      Active   Active         IOS Homepage Server 
   QDM                   3      Active   Active         QOS Device Manager Server 
   QDM_SA                4      Active   Active         QOS Device Manager Signed Applet Server 
   WEB_EXEC              5      Inactive Inactive       HTTP based IOS EXEC Server 
   IXI                   6      Active   Active         IOS XML Infra Application Server 
   IDCONF                7      Active   Active         IDCONF HTTP(S) Server 
   XSM                   8      Active   Active         XML Session Manager 
   VDM                   9      Active   Active         VPN Device Manager Server 
   XML_Api               10     Active   Active         XML Api 
   ITS                   11     Active   Active         IOS Telephony Service 
   ITS_LOCDIR            12     Active   Active         ITS Local Directory Search 
   CME_SERVICE_URL       13     Active   Active         CME Service URL 
   CME_AUTH_SRV_LOGIN    14     Active   Active         CME Authentication Server 
   IPS_SDEE              15     Active   Active         IOS IPS SDEE Server 
   tti-petitioner        16     Active   Active         TTI Petitioner 
   

Cisco has released free software updates that addresses 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 using Third Party Support Organizations

Customers without Service Contracts

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 reported to Cisco TAC by customers observing the vulnerability during the normal operation of their devices.

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.

This advisory is posted on Cisco Security Intelligence Operations at the following link

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

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.