SB2012062902 - Cross-site scripting in MediaWiki

Description

This security bulletin contains information about 1 security vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2012-2698)

Vulnerability allows a remote attacker to perform Cross-site scripting attacks.

An input validation error exists in the outputPage function in includes/SkinTemplate.php in MediaWiki before 1.17.5, 1.18.x before 1.18.4, and 1.19.x before 1.19.1 when processing uselang parameter to index.php/Main_page. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• http://lists.wikimedia.org/pipermail/mediawiki-announce/2012-June/000116.html
• http://lists.wikimedia.org/pipermail/mediawiki-announce/2012-June/000117.html
• http://lists.wikimedia.org/pipermail/mediawiki-announce/2012-June/000118.html
• http://secunia.com/advisories/49484
• http://securitytracker.com/id?1027179
• http://www.openwall.com/lists/oss-security/2012/06/14/2
• http://www.osvdb.org/82983
• https://bugzilla.wikimedia.org/show_bug.cgi?id=36938
• https://exchange.xforce.ibmcloud.com/vulnerabilities/76311
• https://gerrit.wikimedia.org/r/#/c/7979/1/includes/SkinTemplate.php
• https://www.mediawiki.org/wiki/Release_notes/1.17
• https://www.mediawiki.org/wiki/Release_notes/1.18
• https://www.mediawiki.org/wiki/Release_notes/1.19