CVE-2013-4304 Information

Description

The CentralAuth extension for MediaWiki 1.19.x before 1.19.8 1.20.x before 1.20.7 and 1.21.x before 1.21.2 caches a valid CentralAuthUser object in the centralauth_User cookie even when a user has not successfully logged in which allows remote attackers to bypass authentication without a password.

Reference

http://lists.wikimedia.org/pipermail/mediawiki-announce/2013-September/000133.html http://osvdb.org/96910 http://seclists.org/oss-sec/2013/q3/553 http://secunia.com/advisories/54723 https://bugzilla.wikimedia.org/show_bug.cgi?id=52338 https://exchange.xforce.ibmcloud.com/vulnerabilities/86894