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Posted to dev@directory.apache.org by "Emmanuel Lécharny (Jira)" <ji...@apache.org> on 2026/09/29 16:13:00 UTC

[jira] [Resolved] (DIRAPI-449) Grammar transitions ignore TLV nesting, enabling filter-structure smuggling

     [ https://issues.apache.org/jira/browse/DIRAPI-449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Emmanuel Lécharny resolved DIRAPI-449.
--------------------------------------
    Resolution: Fixed

Fixed with commit f82ec7e9936ac021ff299ca1a1eaedda32ddb5a8

>  Grammar transitions ignore TLV nesting, enabling filter-structure smuggling
> ----------------------------------------------------------------------------
>
>                 Key: DIRAPI-449
>                 URL: https://issues.apache.org/jira/browse/DIRAPI-449
>             Project: Directory Client API
>          Issue Type: Bug
>    Affects Versions: 2.1.8
>            Reporter: Emmanuel Lécharny
>            Priority: Major
>             Fix For: 2.1.9
>
>
> An environment fronts *ApacheDS* with an *LDAP*-inspecting gateway that blocks filters touching _(userPassword=*);_ the attacker tucks an extra _(userPassword=*)_ _equalityMatch_ *TLV* inside a substring element's *TLV* — the gateway's conformant parser errors out or sees only the benign clauses, while this codec evaluates the smuggled clause as a sibling filter.



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