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MediaWiki AJAX UTF-7 Cross-Site Scripting

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Release Date:  2007-02-21    Last Update:  2007-03-02    Views:  12,930

Secunia Advisory SA24211

Where:

From remote

Impact:

Cross Site Scripting

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Moshe BA has reported a vulnerability in MediaWiki, which can be exploited by malicious people to conduct cross-site scripting attacks.

Input passed to the "rs" parameter in index.php (when "action" is set to "ajax") is not properly sanitised from UTF-7 data before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that $wgUseAjax is set to true (not default setting) and that the target user uses Internet Explorer with encoding auto-detection enabled.

The vulnerability is related to:
SA23647

The vulnerability is reported in the 1.6.x branch before 1.6.10, the 1.7.x branch before 1.7.3, the 1.8.x branch before 1.8.4, and the 1.9.x branch before 1.9.3.


Solution:
Update to version 1.6.10, 1.7.3, 1.8.4, or 1.9.3.

Provided and/or discovered by:
Moshe BA, BugSec LTD.

Original Advisory:
BugSec LTD.:
http://www.bugsec.com/articles.php?Security=24

MediaWiki:
http://svn.wikimedia.org/viewvc/mediawiki/tags/REL1_9_3/phase3/RELEASE-NOTES?revision=20016

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: MediaWiki AJAX UTF-7 Cross-Site Scripting

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