CVE-2015-8623

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.

Category

8.8
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.13%
Vendor Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.html mailing list release notes patch vendor advisory
http://www.openwall.com/lists/oss-security/2015/12/23/7 mailing list third party advisory patch
https://phabricator.wikimedia.org/T119309 third party advisory patch
http://www.openwall.com/lists/oss-security/2015/12/21/8 mailing list third party advisory patch
https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.php issue tracking third party advisory

Frequently Asked Questions

What is the severity of CVE-2015-8623?
CVE-2015-8623 has been scored as a high severity vulnerability.
How to fix CVE-2015-8623?
To fix CVE-2015-8623, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-8623 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-8623 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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