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Apache Struts 2 Command Execution Vulnerability in Multiple Cisco Products

Advisory ID: cisco-sa-20131023-struts2

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-struts2

Revision 1.0

For Public Release 2013 October 23 16:00  UTC (GMT)


Summary

Multiple Cisco products include an implementation of the Apache Struts 2 component that is affected by a remote command execution vulnerability.

The vulnerability is due to insufficient sanitization of user-supplied input. An attacker could exploit this vulnerability by sending crafted requests consisting of Object-Graph Navigation Language (OGNL) expressions to an affected system. An exploit could allow the attacker to execute arbitrary code on the targeted system.

Cisco has released free software updates that address this vulnerability for all the affected products except Cisco Business Edition 3000. Cisco Business Edition 3000 should contact their Cisco representative for available options.

Workarounds that mitigate this vulnerability are not available. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-struts2

Affected Products

Vulnerable Products

All software releases for the following Cisco products are affected by this vulnerability:
  • Cisco Business Edition 3000
  • Cisco Identity Services Engine (ISE)
  • Cisco Media Experience Engine (MXE) 3500 Series
  • Cisco Unified SIP Proxy (CUSP)

Note: Cisco ISE Software is affected by additional vulnerabilities that are described in the Cisco Security Advisory at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-ise

Cisco ISE customer should consult that advisory before making a decision on the upgrade path.

Products Confirmed Not Vulnerable

The following Cisco products have been analyzed and are not affected by this vulnerability:
  •     Cisco Adaptive Security Appliance (ASA) Software
  •     Cisco Business Edition 5000 and Cisco Business Edition 6000 Series
  •     Cisco Cloud Web Security
  •     Cisco Conductor
  •     Cisco Configuration Assurance Solution
  •     Cisco Data Center Network Manager (DCNM)
  •     Cisco DVR
  •     Cisco Emergency Responder
  •     Cisco Firewall Service Module (FWSM) Software
  •     Cisco Hosted Collaboration Mediation Fulfillment (HCM-F)
  •     Cisco Media Experience Engine (MXE) 3000 Series and Cisco MXE 5600 Series
  •     Cisco Prime Central for HCS Assurance
  •     Cisco Prime Infrastructure
  •     Cisco Prime LAN Management Solution (LMS)
  •     Cisco Prime Network Control System (NCS)
  •     Cisco Secure Access Control Server (ACS)
  •     Cisco TelePresence Manager, Cisco TelePresence Recording Server and Cisco TelePresence Multipoint Switch
  •     Cisco Unified Attendant Consoles
  •     Cisco Unified Communication Domain Manager (CUCDM)
  •     Cisco Unified Communication Manager (CallManager)
  •     Cisco Unified Communications Manager IM and Presence Service and Cisco Unified Presence
  •     Cisco Unified Contact Center Enterprise (UCCE)
  •     Cisco Unified MeetingPlace
  •     Cisco Unified Operation Manager (CUOM)
  •     Cisco Unified Services Monitor (CUSM)
  •     Cisco Unified Survivable Remote Site Telephony (SRST) Manager
  •     Cisco Unified Survivable Remote Site Voicemail (SRSV)
  •     Cisco Unity Connection
  •     Cisco Videoscape Control Suite
  •     Cisco Web Security, Cisco Email Security and Cisco Content Security Management Appliances
  •     Cisco WebEx
  •     Cisco WebEx Recording Format (WRF) and Cisco WebEx Network-Based Recorder (NBR) Player
  •     Cisco Wireless Control System (WCS)
  •     CiscoWorks Common Services

No other Cisco products are affected by this vulnerability.


Details

A vulnerability in the DefaultActionMapper component could allow an unauthenticated, remote attacker to execute arbitrary commands on the targeted system.

The vulnerability is due to insufficient sanitization of user-supplied input. An attacker could exploit this vulnerability by sending crafted requests consisting of Object-Graph Navigation Language (OGNL) expressions. An exploit could allow the attacker to execute arbitrary code on the targeted system.

The impact of this vulnerability on Cisco products varies depending on the affected product. Successful exploitation on Cisco ISE, Cisco Unified SIP Proxy, and Cisco Business Edition 3000 could result in an arbitrary command executed on the affected system. There is no authentication needed to execute the attack on Cisco ISE and Cisco Unified SIP Proxy. To exploit this vulnerability on Cisco Business Edition 3000, the attacker must provide valid credentials or persuade a user with valid credentials to execute a malicious URL.

Successful exploitation on the Cisco MXE 3500 Series could allow the attacker to redirect the user to a different and possibly malicious website, however arbitrary command execution is not possible on this product.

See the "Vulnerability Scoring Details" section of this security advisory for additional information regarding the attack vector and impact.

This vulnerability is documented in Cisco bug IDs CSCui22841 (registered customers only) for Cisco ISE, CSCui33268 (registered customers only) for Cisco Business Edition 3000, CSCui40582 (registered customers only) for Cisco Unified SIP Proxy and CSCui48757 (registered customers only) for Cisco MXE 3500 Series.
This vulnerability has been assigned the Common Vulnerabilities and Exposures (CVE) ID CVE-2013-2251

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





CSCui22841 - Cisco ISE Apache Struts 2 Remote Command Execution Vulnerability

Calculate the environmental score of CSCui22841

CVSS Base Score - 10.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

Complete

Complete

Complete

CVSS Temporal Score - 8.3

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCui33268 - Cisco BE3000 Apache Struts 2 Remote Command Execution Vulnerability

Calculate the environmental score of CSCui33268

CVSS Base Score - 9.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

Single

Complete

Complete

Complete

CVSS Temporal Score - 7.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCui40582 - CUSP Apache Struts 2 Remote Command Execution Vulnerability

Calculate the environmental score of CSCui40582

CVSS Base Score - 10.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

Complete

Complete

Complete

CVSS Temporal Score - 8.3

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCui48757 - Cisco MXE 3500 Apache Struts 2 Remote Command Execution Vulnerability

Calculate the environmental score of CSCui48757

CVSS Base Score - 4.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

Single

None

Partial

None

CVSS Temporal Score - 3.3

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed


Impact

The impact of this vulnerability on Cisco products varies depending on the affected product. Successful exploitation on Cisco ISE, Cisco Unified SIP Proxy, and Cisco Business Edition 3000 could result in an arbitrary command executed on the affected system. There is no authentication needed to execute the attack on Cisco ISE and Cisco Unified SIP Proxy. To exploit this vulnerability on Cisco Business Edition 3000, the attacker must provide valid credentials or persuade a user with valid credentials to execute a malicious URL.

Successful exploitation on the Cisco MXE 3500 Series could allow the attacker to redirect the user to a different and possibly malicious website, however arbitrary command execution is not possible on this product.

Software Versions and Fixes

Cisco has released free software updates that address this vulnerability for all the affected products except Cisco Business Edition 3000. Cisco Business Edition 3000 should contact their Cisco representative for available options.

When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices 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.

The following table provides the first fixed release for each of the affected product:

 Product First Fixed Release
Cisco ISE1  1.0.4.573-6, 1.1.0.665-4, 1.1.1.268-6, 1.1.2.145-9, 1.1.3.124-4, 1.1.4.218-4 and 1.2.0.899
Cisco Business Edition 3000  Not available - Please contact Cisco TAC or your Cisco representative for available options
Cisco Unified SIP Proxy  8.5(5)
Cisco MXE 3500 Series  3.3.2 and apply StrutsPatch.zip

1Cisco ISE is affected by additional vulnerabilities that are described in the Cisco Security Advisory at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-ise

Cisco ISE customers should consult that advisory before making a decision on the upgrade path.

Workarounds

There is no workaround that mitigates 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.

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 Navigator on Cisco.com at http://www.cisco.com/cisco/software/navigator.html.

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

Apache has confirmed this vulnerability at: http://struts.apache.org/release/2.3.x/docs/s2-016.html

Code to exploit this vulnerability is publicly available from different sources over the Internet. Proof of concept code is also published on the official Apache Struts 2 page.

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

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 at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-struts2

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 2013-October-23 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.