It was found that the block / unblock API modules of MediaWiki, a wiki engine, did not verify if the security token was being present in the operations performing blocking / unblocking of another user account. A valid MediaWiki user with block privileges could use this flaw to block or unblock user account of another user without providing a security token (CSRF). References: [1] http://lists.wikimedia.org/pipermail/wikitech-l/2012-March/059230.html Upstream bug report: [2] https://bugzilla.wikimedia.org/show_bug.cgi?id=34212 Upstream patch: [3] https://bugzilla.wikimedia.org/attachment.cgi?id=9957 Included within revision: [4] https://www.mediawiki.org/wiki/Special:Code/MediaWiki/114429
This issue affects the versions of the mediawiki package, as shipped with Fedora release of 15 and 16. -- This issue did NOT affect the version of the mediawiki package, as shipped with Fedora EPEL 5.
Created mediawiki tracking bugs for this issue Affects: fedora-all [bug 806398]
The CVE identifier of CVE-2012-1578 has been assigned to this issue: http://www.openwall.com/lists/oss-security/2012/03/24/1
The current version of mediawiki in Fedora is not vulnerable to this issue (1.19.4), however EPEL5 still provides mediawiki 1.14 as well as 1.16; EPEL6 and Fedora also provide 1.16. It is unknown whether or not those versions are affected by this issue as they are no longer supported by upstream.