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Vulnerability Alert

Multiple Vendor Products Struts 2 Action: Parameter Processing Command Injection Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:30128
Version:4
First Published:2013 July 18 15:03 GMT
Last Published:2014 April 24 14:06 GMT
Port: Not available
CVE:CVE-2013-2251
BugTraq ID:61189
Urgency:Possible use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:10.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:8.3
 
Version Summary:Apache has released an additional security advisory and updated software to address the vulnerabilities in Apache products using Apache Struts 2.
 
 
Description
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.

Proof-of-concept code that exploits this vulnerability is publicly available.

Apache.org has confirmed this vulnerability and released updated software.
 
Warning Indicators
Products using Apache Struts versions 2.0.0 through 2.3.15 are vulnerable. As identified in the Cisco Security Advisory, the following Cisco products are vulnerable:
  • Cisco Identity Services Engine Software
  • Cisco Business Edition 3000 Software
  • Cisco Unified SIP Proxy
  • Cisco MXE 3500 (Media Experience Engine)
 
IntelliShield Analysis
To exploit the vulnerability, the attacker may need access to trusted or internal networks to be able to transmit crafted requests to the targeted system. This access requirement could limit the likelihood of a successful attack.

The vendor report indicates that the vulnerability has been fixed by changing the DefaultActionMapper to sanitize action: prefixed information properly. The feature involved with redirect:/redirectAction: prefixed parameters was removed completely.

Reports indicate that this vulnerability is being exploited actively in the wild and are highly automated, which increases the likelihood of widespread attacks.
 
Vendor Announcements
Apache has released security advisories at the following links: S2-016 and CVE-2013-2251

Cisco has released a security advisory for Cisco bug IDs CSCui22841, CSCui33268, CSCui40582, and CSCui48757 at the following link: cisco-sa-20131023-struts2
 
Impact
An unauthenticated, remote attacker could exploit the vulnerability to inject simple expressions or execute arbitrary commands on the targeted system. This could allow the attacker to gain sensitive information or inject server-side codes.
 
Technical Information
The vulnerability exists in a short-circuit navigation state change method of the DefaultActionMapper due to improper handling of parameters with action: or redirect: mechanisms. These mechanisms are intended to attach navigational information to buttons within forms through prefixed information; however, due to this vulnerability, insecure target expressions could be executed on the targeted system.

An unauthenticated, remote attacker could exploit the vulnerability by providing malicious expressions through HTTP requests. Processing such expressions could allow the attacker to execute simple expressions or arbitrary commands evaluated as OGNL expressions against the value stack on the targeted system.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

Administrators are advised to monitor affected systems.
 
Patches/Software
Apache has released updated software at the following links: Cisco customers with active contracts can obtain updates through the Software Center. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com.

Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
2579/0Apache Struts 2 Command Execution VulnerabilityS7342013 Aug 13 
 
Alert History
 

Version 3, October 23, 2013, 12:11 PM: Cisco has released a security advisory to address vulnerabilities in Cisco products using Apache Struts 2.

Version 2 July 25, 2013, 3:48 PM: IntelliShield has updated this alert to reflect a modification in the urgency and exploitability of the Apache Struts action: parameter processing command injection vulnerability.

Version 1, July 18, 2013, 3:03 PM: Apache Struts contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on the targeted system. Updates are available.


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Apache Software FoundationArchiva 1.2 Base, .1, .2 | 1.3 Base, .1, .2, .3, .4, .5, .6
Apache Software FoundationStruts 2.0 .Base, .1, .2, .3, .4, .5, .6, .7, .8, .9, .10, .11.1, .11.2, .12, .13 | 2.1 .0, .1, .2, .3, .4, .5, .6, .8, .8.1 | 2.2 .1, .1.1, .3, .3.1 | 2.3 .1, .1.1, .4, .5, .6, .7, .8, .9, .10, .11, .12, .13, .14, .15
CiscoCisco Identity Services Engine Software 1.0 .4.573 | 1.1 .1 patch 1, .1 patch 2, .1 patch 3, .1 patch 4, .1 patch 5, .2 patch 1, .2 patch 2, .2 patch 3, .2 patch 4, .2 patch 5, .2 patch 6, .2 patch 7, .2 patch 8, .3 patch 1, .3 patch 2, .3 patch 3, .4 patch 1, .4 patch 2, .4 patch 3
CiscoCisco Business Edition 3000 Software 8.6 Base
CiscoCisco Unified SIP Proxy 1.1 .2(MD), .3(MD), .4(MD), .5(MD) | 8.5 .1(GD), .2(GD), .3, .4(MD)
CiscoCisco MXE 3500 (Media Experience Engine) 3.0 Base | 3.1 Base | 3.2 Base | 3.3 Base, .2

Associated Products:
N/A




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