CVE-2015-8623 Information

Description

The User::matchEditToken function in includes/User.php in MediaWiki before 1.23.12 and 1.24.x before 1.24.5 does not perform token comparison in constant time before returning which allows remote attackers to guess the edit token and bypass CSRF protection via a timing attack a different vulnerability than CVE-2015-8624.

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://gerrit.wikimedia.org/r//c/156336/5/includes/User.php 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