CVE-2015-8623

moderate-risk
Published 2017-03-23

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.

Do I need to act?

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0.13% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (6)

Affected Vendors

Mediawiki

References (10)

Mailing List http://www.openwall.com/lists/oss-security/2015/12/21/8
Mailing List http://www.openwall.com/lists/oss-security/2015/12/23/7
Issue Tracking https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.php
Patch https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.ht...
Patch https://phabricator.wikimedia.org/T119309
Mailing List http://www.openwall.com/lists/oss-security/2015/12/21/8
Mailing List http://www.openwall.com/lists/oss-security/2015/12/23/7
Issue Tracking https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.php
Patch https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.ht...
Patch https://phabricator.wikimedia.org/T119309
44
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 1/34 · Minimal
Exposure 13/34 · Low