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https://issues.apache.org/jira/browse/KNOX-3417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18104689#comment-18104689
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ASF subversion and git services commented on KNOX-3417:
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Commit 3cb8ef745c44b39377d855d835198de183a4cef3 in knox's branch
refs/heads/master from hanicz
[ https://gitbox.apache.org/repos/asf?p=knox.git;h=3cb8ef745 ]
KNOX-3417: KnoxLdapRealm builds the LDAP search filter from the client username
without RFC-4515 escaping (#1348)
> KnoxLdapRealm builds the LDAP search filter from the client username without
> RFC-4515 escaping
> ----------------------------------------------------------------------------------------------
>
> Key: KNOX-3417
> URL: https://issues.apache.org/jira/browse/KNOX-3417
> Project: Apache Knox
> Issue Type: Bug
> Components: Server
> Affects Versions: 2.1.0, 3.0.0
> Reporter: Tamás Hanicz
> Assignee: Tamás Hanicz
> Priority: Blocker
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Reported by n0mi1k Security
> KnoxLdapRealm.java:699-703 formats (&(objectclass=%s)(%s=%s)) with
> expandTemplate(getUserSearchAttributeTemplate(), matchedPrincipal), and :706
> expands the operator's userSearchFilter the same way; expandTemplate
> (:752-760) is a plain \{0} substitution with no encoding, principalRegex
> defaults to (.*) (:138) so matchPrincipal filters nothing, and the value
> reaches systemLdapCtx.search(searchBase, searchFilter, searchControls) at
> :716. No filter-escaping helper exists anywhere in the realm. The username
> arrives pre-authentication, via doGetAuthenticationInfo to getUserDn at :263.
> It's a filter-injection primitive rather than a demonstrated credential-less
> bypass.
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