CVE-2015-8624 Information

Description

The User::matchEditToken function in includes/User.php in MediaWiki before 1.23.12 1.24.x before 1.24.5 1.25.x before 1.25.4 and 1.26.x before 1.26.1 does not perform token comparison in constant time before determining if a debugging message should be logged which allows remote attackers to guess the edit token and bypass CSRF protection via a timing attack a different vulnerability than CVE-2015-8623.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://www.openwall.com/lists/oss-security/2015/12/21/8 http://www.openwall.com/lists/oss-security/2015/12/23/7 https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.html https://phabricator.wikimedia.org/T119309

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8