Apache Struts 2 - DefaultActionMapper Prefixes OGNL Code Execution

By
Sooraj V Nair
Published on
16 Jun 2021
Vulnerability

Remote Code Evaluation will result in the entire web application and web server being compromised.Here RCE is performed over Apache Struts 2 . Remote attackers can execute arbitrary OGNL expressions through a parameter with a crafted (1) action:, (2) redirect:, or (3) redirectAction: prefix in Apache Struts 2.0.0 through 2.3.15.

Impact

A lot of information disclosure can happen.The credibility of the system has been completely compromised.The entire system is compromised as a result of a total lack of system security.The affected resource has been fully shut down.The intruder has the ability to make the resource entirely unusable.

Mitigation / Precaution

In order to patch this vulnerability, please install the official patch Apache Struts 2 made available for supported, vulnerable instances.

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Written by
Sooraj V Nair
Sooraj V Nair
Cyber Security Engineer
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