[apops] Cisco Security Advisory: Multiple Vulnerabilities in Cisco IOS S

  • To: apops at apops dot net
  • Subject: [apops] Cisco Security Advisory: Multiple Vulnerabilities in Cisco IOS Software Traffic Optimization Features
  • From: Cisco Systems Product Security Incident Response Team <psirt at cisco dot com>
  • Date: Wed, 28 Mar 2012 12:20:57 -0400
  • Cc: psirt at cisco dot com
  • Delivered-to: apops at mailman dot apnic dot net
  • List-archive: <http://mailman.apnic.net/mailing-lists/apops>
  • List-help: <mailto:apops-request@apops.net?subject=help>
  • List-id: Asia Pacific Operators Forum <apops.apops.net>
  • List-post: <mailto:apops@apops.net>
  • List-subscribe: <http://mailman.apnic.net/mailman/listinfo/apops>, <mailto:apops-request@apops.net?subject=subscribe>
  • List-unsubscribe: <http://mailman.apnic.net/mailman/listinfo/apops>, <mailto:apops-request@apops.net?subject=unsubscribe>
  • Prevent-nondelivery-report:
  • Reply-to: psirt@cisco.com
  • Sender: nobody@cisco.com
    • Hash: SHA256
      
      Cisco Security Advisory: Multiple Vulnerabilities in Cisco IOS Software
      Traffic Optimization Features
      
      Advisory ID: cisco-sa-20120328-mace
      
      Revision 1.0
      
      For Public Release 2012 March 28 16:00  UTC (GMT)
      
      +--------------------------------------------------------------------
      
      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 free software updates that address these
      vulnerabilities. This advisory is available at the following link:
      
      http://tools.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 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
      
      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
      
      
      * CSCtt45381
      
      CVSS Base Score - 7.8
          Access Vector -            Network
          Access Complexity -        Low
          Authentication -           None
          Confidentiality Impact -   None
          Integrity Impact -         None
          Availability Impact -      Complete
      
      CVSS Temporal Score - 6.4
          Exploitability -           Functional
          Remediation Level -        Official-Fix
          Report Confidence -        Confirmed
      
      
      * CSCtq64987 and CSCtu57226
      
      CVSS Base Score - 7.1
          Access Vector -            Network
          Access Complexity -        Medium
          Authentication -           None
          Confidentiality Impact -   None
          Integrity Impact -         None
          Availability Impact -      Complete
      
      CVSS Temporal Score - 5.9
          Exploitability -           Functional
          Remediation Level -        Official-Fix
          Report Confidence -        Confirmed
      
      
      Impact
      ======
      
      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.
      
      Software Versions and Fixes
      ===========================
      
      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
      
      
      
      +------------------------------------------------------------+
      |  Major   |          Availability of Repaired Releases      |
      | Release  |                                                 |
      |----------+-------------------------------------------------|
      | Affected |                  | First Fixed Release for All  |
      |12.0-Based|   First Fixed    | Advisories in the March 2012 |
      | Releases |     Release      | Cisco IOS Software Security  |
      |          |                  | Advisory Bundled Publication |
      |------------------------------------------------------------|
      |         There are no affected 12.0 based releases          |
      |------------------------------------------------------------|
      | Affected |                  | First Fixed Release for All  |
      |12.2-Based|   First Fixed    | Advisories in the March 2012 |
      | Releases |     Release      | Cisco IOS Software Security  |
      |          |                  | Advisory Bundled Publication |
      |------------------------------------------------------------|
      |         There are no affected 12.2 based releases          |
      |------------------------------------------------------------|
      | Affected |                  | First Fixed Release for All  |
      |12.3-Based|   First Fixed    | Advisories in the March 2012 |
      | Releases |     Release      | Cisco IOS Software Security  |
      |          |                  | Advisory Bundled Publication |
      |------------------------------------------------------------|
      |         There are no affected 12.3 based releases          |
      |------------------------------------------------------------|
      | Affected |                  | First Fixed Release for All  |
      |12.4-Based|   First Fixed    | Advisories in the March 2012 |
      | Releases |     Release      | Cisco IOS Software Security  |
      |          |                  | Advisory Bundled Publication |
      |------------------------------------------------------------|
      |         There are no affected 12.4 based releases          |
      |------------------------------------------------------------|
      | Affected |                  | First Fixed Release for All  |
      |15.0-Based|   First Fixed    | Advisories in the March 2012 |
      | Releases |     Release      | Cisco IOS Software Security  |
      |          |                  | Advisory Bundled Publication |
      |------------------------------------------------------------|
      |         There are no affected 15.0 based releases          |
      |------------------------------------------------------------|
      | Affected |                  | First Fixed Release for All  |
      |15.1-Based|   First Fixed    | Advisories in the March 2012 |
      | Releases |     Release      | Cisco IOS Software Security  |
      |          |                  | Advisory Bundled Publication |
      |----------+------------------+------------------------------|
      |15.1EY    |Not vulnerable    |15.1(2)EY2                    |
      |----------+------------------+------------------------------|
      |15.1GC    |Not vulnerable    |15.1(2)GC2                    |
      |----------+------------------+------------------------------|
      |          |15.1(4)M4;        |15.1(4)M4; Available on       |
      |15.1M     |Available on      |30-MAR-12                     |
      |          |30-MAR-12         |                              |
      |----------+------------------+------------------------------|
      |          |                  |Vulnerable; contact your      |
      |          |                  |support organization per the  |
      |15.1MR    |Not vulnerable    |instructions in Obtaining     |
      |          |                  |Fixed Software section of this|
      |          |                  |advisory.                     |
      |----------+------------------+------------------------------|
      |          |Cisco IOS XE      |                              |
      |          |devices: Please   |Cisco IOS XE devices: Please  |
      |15.1S     |see Cisco IOS XE  |see Cisco IOS XE Software     |
      |          |Software          |Availability                  |
      |          |Availability      |                              |
      |----------+------------------+------------------------------|
      |          |Cisco IOS XE      |                              |
      |          |devices: Please   |Cisco IOS XE devices: Please  |
      |15.1SG    |see Cisco IOS XE  |see Cisco IOS XE Software     |
      |          |Software          |Availability                  |
      |          |Availability      |                              |
      |----------+------------------+------------------------------|
      |          |                  |Vulnerable; contact your      |
      |          |                  |support organization per the  |
      |15.1SNG   |Not vulnerable    |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 |                  | First Fixed Release for All  |
      |15.2-Based|   First Fixed    | Advisories in the March 2012 |
      | Releases |     Release      | 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                     |
      |          |                  |                              |
      |----------+------------------+------------------------------|
      |          |15.2(1)T2         |15.2(1)T2                     |
      |          |15.2(2)T1         |15.2(2)T1                     |
      |15.2T     |15.2(3)T;         |15.2(3)T; Available on        |
      |          |Available on      |30-MAR-12                     |
      |          |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.
      
      
      Workarounds
      ===========
      
      There are no workarounds for these vulnerabilities.
      
      There is no Applied Mitigation Bulletin (AMB) for this advisory.
      
      Obtaining Fixed Software
      ========================
      
      Cisco has released free software updates that address the
      vulnerabilities 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 at cisco dot com or security-alert at cisco dot 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 at cisco dot 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
      vulnerabilities that are described in this advisory.
      
      These vulnerabilities were initially found by Cisco during internal
      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-mace
      
      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 at cisco dot com
        * first-bulletins at lists dot first dot org
        * bugtraq at securityfocus dot com
        * vulnwatch at vulnwatch dot org
        * cisco at spot dot colorado dot edu
        * cisco-nsp at puck dot nether dot net
        * full-disclosure at lists.grok dot org dot 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/en/US/products/products_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.
      -----BEGIN PGP SIGNATURE-----
      Version: GnuPG v1.4.11 (GNU/Linux)
      
      iF4EAREIAAYFAk9yeDQACgkQQXnnBKKRMND8JAD+LwCEQ/3I15qyaV2fGjOXnBBP
      oqdlu1PkfePXe5OeMaoA/iUbaiXx3glDNbmziQwcm+fVu2RAJ1HvZzyh0mjz9vOn
      =BPrU
      -----END PGP SIGNATURE-----