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https://issues.apache.org/jira/browse/DIRAPI-451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Emmanuel Lécharny resolved DIRAPI-451.
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Resolution: Fixed
Fixed with commit b427bd3db6fc5b8378b5682b57df350f2b2990cc
> Encoder recurses once per filter sibling and per control, stack overflow
> -------------------------------------------------------------------------
>
> Key: DIRAPI-451
> URL: https://issues.apache.org/jira/browse/DIRAPI-451
> Project: Directory Client API
> Issue Type: Bug
> Affects Versions: 2.1.8
> Reporter: Emmanuel Lécharny
> Priority: Major
> Fix For: 2.1.9
>
>
> A directory-integrated web app accepts a user-provided filter expression,
> parses it with _FilterParser_ and issues it via
> _LdapNetworkConnection.search()_.
> The attacker submits _(|(cn=a0)(cn=a1)...)_ with 100,000 terms.
> Parsing succeeds, then _encodeFilters_ recurses 100,000 frames and throws
> _StackOverflowError_ inside the connection's write path
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