Apache Struts2 remote command execution (S2-045)

Description
  • A Remote Code Execution vulnerability exists in Apache Struts2 when performing file upload based on Jakarta Multipart parser. It is possible to perform a RCE attack with a malicious Content-Type value. If the Content-Type value isn't valid an exception is thrown which is then used to display an error message to a user.

    Affected versions: Struts 2.3.5 - Struts 2.3.31, Struts 2.5 - Struts 2.5.10
Remediation
  • If you are using Jakarta based file upload Multipart parser, upgrade to Apache Struts version 2.3.32 or 2.5.10.1.
References