Summary
Generated value of token can be predictableWho should read this | All Struts 2 developers and users |
|---|---|
Impact of vulnerability | The attacker make a specially craft form using the predicted token that force an action to a logged-in user (CSRF). |
Maximum security rating | Medium |
Recommendation | Developers should immediately upgrade to Struts 2.3.20 if they use |
Affected Software | Struts 2.0.0 - Struts 2.3.16.3 |
Reporter | Philippe Arteau of Groupe Technologies Desjardins |
CVE Identifier | CVE-2014-7809 |
Problem
The attacker fetch any given form where a token is present and can predict the next value of the token used to secure form submission.
Solution
In Struts 2.3.20 a better random generator was used to generate unpredictable values.
Backward compatibility
No backward compatibility problems are expected.