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https://issues.apache.org/jira/browse/DIRAPI-439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18120636#comment-18120636
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Emmanuel Lécharny commented on DIRAPI-439:
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Found by Claude
> Hostile server subschema bytecode is class-loaded and instantiated on the
> client
> --------------------------------------------------------------------------------
>
> Key: DIRAPI-439
> URL: https://issues.apache.org/jira/browse/DIRAPI-439
> Project: Directory Client API
> Issue Type: Bug
> Affects Versions: 2.1.8
> Reporter: Emmanuel Lécharny
> Priority: Critical
> Fix For: 2.1.9
>
>
> A rogue/compromised *LDAP* server (or pre-*TLS* *MITM*) answers a client's
> _loadSchema()_ subschema search with '_syntaxCheckers_:
> {code:java}
> ( 1.2.3.4 FQCN evil.Pwn BYTECODE <base64 of a class whose static{} runs
> Runtime.exec> X-SCHEMA "other" )
> {code}
> _DefaultSchemaLoader_ parses it, _SchemaEntityFactory_ defines the class via
> _AttributeClassLoader_ and instantiates it — attacker code executes in the
> client *JVM* with the application's privileges.
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