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https://issues.apache.org/struts/browse/WW-2782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=45206#action_45206
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James Holmes commented on WW-2782:
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Is this even an issue now that Struts 2.0.14 has been released? Have you tried
using the latest 2.0.14 release?
> 2.0.11.1 Websphere Workaround Incorrect
> ---------------------------------------
>
> Key: WW-2782
> URL: https://issues.apache.org/struts/browse/WW-2782
> Project: Struts 2
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 2.0.11.2
> Reporter: Kevin Decker
>
> From all of the documentation that I could find regarding resolutions for the
> S2-003 security bulletin, effectively involve one of two paths if websphere
> support is required. Both of these workarounds failed within my testing
> environment.
> 1) Use annotations for validation.
> I was not able to make this work. It seemed as though Websphere would fail
> any time there was a validation interceptor on the stack. I was also unable
> to get a root cause stack frame due to my unfamilarity with the Websphere
> architecture and the root cause being masked by the FileNotFoundException
> filter issue. Punted on this solution due to time constraints.
> 2) Use excludeParams to filter out possibly malicous parameter names.
> It appears that the reg ex given for this filter is incorrect.
> Given filter: <param name="excludeParams">.*[[^\\p{Graph}][\\\\#:=]].*</param>
> When this was applied to the params interceptor, the config parser converted
> this into the java string defined by the following:
> ".*[[^\\\\p{Graph}][\\\\\\\\#:=]].*"
> Breaking the \p{Graph} class, causing this expression to match just about
> anything that has characters outside of this set [Graphp{}\] (unescaped
> string).
> This XML fragment appears to resolve the issue:
> <param name="excludeParams">.*[[^\p{Graph}][\\#:=]].*</param>
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