Summary

• Cisco IOS Software contains a denial of service (DoS) vulnerability in the Wide Area Application Services (WAAS) Express feature that could allow an unauthenticated, remote attacker to cause the router to leak memory or to reload.
  
  Cisco IOS Software also contains a DoS vulnerability in the Measurement, Aggregation, and Correlation Engine (MACE) feature that could allow an unauthenticated, remote attacker to cause the router to reload.
  
  An attacker could exploit these vulnerabilities by sending transit traffic through a router configured with WAAS Express or MACE. Successful exploitation of these vulnerabilities could allow an unauthenticated, remote attacker to cause the router to leak memory or to reload. Repeated exploits could allow a sustained DoS condition.
  
  Cisco has released software updates that address these vulnerabilities. This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-mace
  
  

  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 with the mace enable or waas enable interface configuration commands on one or more interfaces. Additional configuration is required for WAAS Express or MACE to be configured; more details follow.
  
  Note: Cisco IOS Software is vulnerable only when configured for WAAS Express or MACE. Cisco IOS Software configured for WAAS, not WAAS Express, is not vulnerable.
  
  For more information on WAAS Express, see http://www.cisco.com/en/US/products/ps11211/index.html.
  For more information about MACE, see http://www.cisco.com/en/US/prod/collateral/netmgtsw/ps11709/ps11671/guide_c07-664643.html.
  
  

  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

  No other Cisco products are currently known to be affected by these vulnerabilities.

Details

• The Cisco Wide Area Application Services (WAAS) Express feature allows optimization of the WAN bandwidth required to access centrally located applications. WAAS Express allows the traffic to be optimized by a Cisco Integrated Services Router (ISR G2), with no other devices required.
  
  The Cisco Measurement, Aggregation, and Correlation Engine (MACE) is a Cisco IOS feature that is used for measurement and analysis of network traffic. The feature may be used with WAAS Express to give details of optimized traffic or used by itself to help measure application performance.
  
  Cisco IOS Software contains a DoS vulnerability in the WAAS Express feature that could allow an unauthenticated, remote attacker to cause the router to leak memory or to reload. This vulnerability is documented in Cisco bug ID CSCtt45381 (registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2012-1314.
  
  Cisco IOS Software contains a DoS vulnerability in the MACE feature that could allow an unauthenticated, remote attacker to cause the router to reload. This vulnerability is documented in Cisco bug IDs CSCtq64987 and CSCtu57226 and has been assigned CVE ID CVE-2012-1312.
  
  An attacker could exploit these vulnerabilities by sending transit traffic through a router configured with WAAS Express or MACE. Successful exploitation of these vulnerabilities could allow an unauthenticated, remote attacker to cause the router to leak memory or to reload. Repeated exploits could allow a sustained DoS condition.
  
  A configuration similar to one or more of the following configuration excerpts will exist if WAAS Express or MACE is configured on the router.
  
  The following example shows a partial WAAS Express configuration:

  parameter-map type waas waas_global
   tfo optimize full
  class-map type waas match-any HTTP
   match tcp destination port 80
  class-map type waas match-any NNTP
   match  tcp destination port 119 
  ...
  policy-map type waas waas_global
   class HTTP
    optimize tfo dre lz application Web
   class NNTP
    optimize tfo dre lz application Email-and-Messaging
  ...
  interface <egress interface>
   waas enable
  

  The following example shows a partial MACE configuration with WAAS Express already configured as shown in the preceding excerpt:

  flow record type mace my-flow-record
   collect art all
  flow exporter my-flow-exporter
   export-protocol netflow-v9
   destination 10.101.200.1
  flow monitor type mace my-flow-monitor
   record my-flow-record
   exporter my-flow-exporter
  mace monitor waas all my-flow-monitor
  interface <egress interface>
   mace enable
  
  

  The following example shows a partial MACE configuration without WAAS Express:
  

  flow record type mace mace-flow-record
   collect datalink mac source address input
   collect ipv4 dscp
   collect interface input
   collect interface output
   collect application name
   collect waas all
  flow exporter flow-exporter1
   destination 10.101.200.1
   source <interface>
   output-features
   transport udp 32001
  flow monitor type mace mace-flow-monitor1
   record mace-flow-record
   exporter flow-exporter1
  class-map type waas match-any HTTP
   match  tcp destination port 80
   match  tcp destination port 8080
  ...
  policy-map type mace mace_global
   class HTTP
    flow monitor mace-flow-monitor1
  ...
  interface <egress interface>
   mace enable

Workarounds

• There are no workarounds for these vulnerabilities.

  There is no Applied Mitigation Bulletin (AMB) for this advisory.

Fixed Software

• 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 (SIO) portal at https://sec.cloudapps.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
  There are no affected 12.2 based releases
  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
  There are no affected 12.3 based releases
  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
  There are no affected 12.4 based releases
  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
  There are no affected 15.0 based releases
  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	Not vulnerable	15.1(2)GC2
  15.1M	15.1(4)M4; Available on 30-MAR-12	15.1(4)M4; Available on 30-MAR-12
  15.1MR	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1S	Cisco IOS XE devices: Please see Cisco IOS XE Software Availability	Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.1SG	Cisco IOS XE devices: Please see Cisco IOS XE Software Availability	Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.1SNG	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1SNH	Not vulnerable	Not vulnerable
  15.1T	Not vulnerable	15.1(3)T3
  15.1XB	Not vulnerable	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	Not vulnerable	15.2(1)S1
  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

  
  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 XE Software

  Cisco IOS XE Software is not affected by the vulnerabilities that are disclosed in this document.

  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.

Exploitation and Public Announcements

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

  These vulnerabilities were initially found by Cisco during internal testing.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-mace

Revision History

• Revision 1.0

  2012-March-28

  Initial public release

  Show Less