Vulnerability identifier: #VU89696

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-2013-2251

CWE-ID: CWE-20

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 perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and execute arbitrary OGNL expressions via a parameter with a crafted (1) action:, (2) redirect:, or (3) redirectAction: prefix.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Struts: 2.0.0 - 2.3.15

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External links
http://archiva.apache.org/security.html
http://cxsecurity.com/issue/WLB-2014010087
http://osvdb.org/98445
http://packetstormsecurity.com/files/159629/Apache-Struts-2-Remote-Code-Execution.html
http://seclists.org/fulldisclosure/2013/Oct/96
http://seclists.org/oss-sec/2014/q1/89
http://struts.apache.org/release/2.3.x/docs/s2-016.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-struts2
http://www.fujitsu.com/global/support/software/security/products-f/interstage-bpm-analytics-201301e.html
http://www.oracle.com/technetwork/topics/security/cpujan2014-1972949.html
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.securityfocus.com/bid/61189
http://www.securityfocus.com/bid/64758
http://www.securitytracker.com/id/1029184
http://www.securitytracker.com/id/1032916
http://exchange.xforce.ibmcloud.com/vulnerabilities/90392

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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.