CVE-2015-8624

high

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.

References

https://phabricator.wikimedia.org/T119309

https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.html

http://www.openwall.com/lists/oss-security/2015/12/23/7

http://www.openwall.com/lists/oss-security/2015/12/21/8

Details

Source: Mitre, NVD

Published: 2017-03-23

Updated: 2017-03-27

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

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

Severity: High