Technical Description

A vulnerability has been identified in MediaWiki, which could be exploited by attackers to execute arbitrary scripting code. This issue is due to an input validation errors in the AJAX module when handling a specially crafted "rs" parameters, which could be exploited by attackers to cause arbitrary scripting code to be executed by the user's browser (IE) in the security context of an affected Web site with the "wgUseAjax" option enabled (disabled by default).

Affected Products

MediaWiki versions prior to 1.9.3
MediaWiki versions prior to 1.8.4
MediaWiki versions prior to 1.7.3
MediaWiki versions prior to 1.6.10

Solution

Upgrade to MediaWiki version 1.9.3, 1.8.4, 1.7.3, or 1.6.10 :
http://sourceforge.net/projects/wikipedia/

References

http://www.vupen.com/english/advisories/2007/0678
http://sourceforge.net/project/shownotes.php?release_id=487921&group_id=34373
http://www.bugsec.com/articles.php?Security=24

Credits

Vulnerability reported by Moshe BA (BugSec)

ChangeLog

2007-02-21 : Initial release

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