CVE-2012-0391 Apache Struts 2 Improper Input Validation

What is CVE-2012-0391?

CVE-2012-0391 is a critical code injection vulnerability in Apache Struts, published on 8 Jan 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during certain exception handling for mismatched data types of properties, which allows remote attackers to execute arbitrary Java code via a crafted parameter.

Weakness: CWE-94

Which versions are affected by CVE-2012-0391?

4 open source packages ship an affected version, including org.apache.struts.xwork:xwork-core and org.apache.struts:struts2-core. It affects 1 product.

Products include Apache Struts.

How do I fix CVE-2012-0391?

Upgrade org.apache.struts.xwork:xwork-core to 2.2.3.1 or later. US federal agencies must fix it by 21 Jul 2022.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2012-0391 being exploited?

Yes. Attackers have exploited CVE-2012-0391 in the wild since at least 21 Jan 2022.

Public exploit code: 1 Metasploit module and 2 Exploit-DB entries.

Other vulnerabilities in Apache Struts

• CVE-2020-17530 Apache Struts Remote Code Execution Exploited Critical 9.8
• CVE-2017-9791 Apache Struts 1 Improper Input Validation Exploited Critical 9.8
• CVE-2017-5638 Apache Struts Remote Code Execution Exploited Critical 9.8
• CVE-2018-11776 Apache Struts Remote Code Execution Exploited High 8.1
• CVE-2017-9805 Apache Struts Deserialization of Untrusted Data Exploited High 8.1

All Apache Struts vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4wrr-9h5r-m92w.