Vulnerability CVE-2021-31553
Published: 2021-04-22

Description:
An issue was discovered in the CheckUser extension for MediaWiki through 1.35.2. MediaWiki usernames with trailing whitespace could be stored in the cu_log database table such that denial of service occurred for certain CheckUser extension pages and functionality. For example, the attacker could turn off Special:CheckUserLog and thus interfere with usage tracking.

Type:

CWE-428

 (Unquoted Search Path or Element)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.4/10
4.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
Partial
Affected software
Mediawiki -> Mediawiki 

 References:
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027
https://phabricator.wikimedia.org/T275669
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024
Copyright 2024, cxsecurity.com

 

Back to Top