Vulnerability identifier: #VU49062

Vulnerability risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2012-0391

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Apache Struts
Server applications / Frameworks for developing and running applications

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the ExceptionDelegator component in Apache Struts when interpreting parameter values as OGNL expressions during certain exception handling for mismatched data types of properties. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Struts: 2.0.0 - 2.2.3

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External links
http://archives.neohapsis.com/archives/bugtraq/2012-01/0031.html
http://secunia.com/advisories/47393
http://struts.apache.org/2.x/docs/s2-008.html
http://struts.apache.org/2.x/docs/version-notes-2311.html
http://www.exploit-db.com/exploits/18329
http://issues.apache.org/jira/browse/WW-3668
http://www.sec-consult.com/files/20120104-0_Apache_Struts2_Multiple_Critical_Vulnerabilities.txt

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.