Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | <= 1.23.11 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2015/12/21/8Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/23/7Mailing ListPatchThird Party Advisory
- https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.phpIssue TrackingThird Party Advisory
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.htPatchRelease NotesVendor Advisory
- https://phabricator.wikimedia.org/T119309PatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/21/8Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/23/7Mailing ListPatchThird Party Advisory
- https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.phpIssue TrackingThird Party Advisory
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.htPatchRelease NotesVendor Advisory
- https://phabricator.wikimedia.org/T119309PatchThird Party Advisory
FAQ
What is CVE-2015-8623?
CVE-2015-8623 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 att...
How severe is CVE-2015-8623?
CVE-2015-8623 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-8623?
Check the references section above for vendor advisories and patch information. Affected products include: Mediawiki Mediawiki.