Secunia

Some vulnerabilities have been reported in Struts, which can be exploited by malicious people to conduct cross-site scripting attacks, cause a DoS (Denial of Service), or bypass certain security restrictions.

1) The RequestProcessor allows all actions to be canceled making it possible to bypass validation in actions that proceed without checking "isCancelled()". This may allow bypassing of security restrictions.

2) The public method "getMultipartRequestHandler()" in ActionForm gives access to elements in CommonsMultipartRequestHandler and BeanUtils. This can be exploited to cause a DoS by sending a specially request with a parameter referencing the public method.

3) Invalid input is not properly sanitised in LookupDispatchAction when not corresponding to an entry in the lookupMap before being returned to users in an error message. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of a vulnerable site.

Solution
Update to version 1.2.9 or later.
Further details available in Customer Area

Provided and/or discovered by
1) Paul Benedict
2) Bogdan Serban
3) Tommy Wareing

Original Advisory
http://struts.apache.org/struts-doc-1.2.9/userGuide/release-notes.html
http://issues.apache.org/bugzilla/show_bug.cgi?id=38374
http://issues.apache.org/bugzilla/show_bug.cgi?id=38534
http://issues.apache.org/bugzilla/show_bug.cgi?id=38749

Deep Links
Links available in Customer Area