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https://issues.apache.org/jira/browse/DIRAPI-459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18120616#comment-18120616
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Emmanuel Lécharny commented on DIRAPI-459:
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Found by Claude
> FilterParser recurses without depth limit; StackOverflowError on nested
> filters
> -------------------------------------------------------------------------------
>
> Key: DIRAPI-459
> URL: https://issues.apache.org/jira/browse/DIRAPI-459
> Project: Directory Client API
> Issue Type: Bug
> Affects Versions: 2.1.8
> Reporter: Emmanuel Lécharny
> Priority: Major
> Fix For: 2.1.9
>
>
> A server returns a _SearchResultDone_ carrying a referral *URL* whose filter
> part is 15,000 repetitions of _"(!"_.
> _AddReferral_ constructs new _LdapUrl(url)_ which calls _FilterParser.parse_.
> The recursion overflows the stack and the _StackOverflowError_ kills the
> *I/O* processing of the response and, depending on the host application, the
> worker thread.
> Alternatively an advanced-search box passing a raw user filter to
> connection.search hits the same recursion.
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