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Excerpt

Possible RCE in the Struts Showcase app in the Struts 1 plugin example in Struts 2.3.x series


Who should read this

All Struts 2 developers and users should read this

Impact of vulnerability

Possible RCE when using the Struts 2 Struts 1 plugin

Maximum security rating

High

Important

Recommendation

Please read the Solution section

Affected Software

Struts 2.3.x with Struts 1 plugin and Struts 1 action

Reporter

icez <ic3z at qq dot com> from Tophant Competence Center

CVE Identifier

CVE-2017-9791

Problem

It is possible to perform a RCE attack with a malicious field value when using the Struts 2 Struts 1 plugin and it's a Struts 1 action and the value is a part of a message presented to the user, i.e. when using untrusted input as a part of the error message in the ActionMessage class.

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No backward incompatibility issues are expected.