vulnerability
MediaWiki: Unquoted Search Path or Element (CVE-2021-31553)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:L/Au:N/C:N/I:P/A:P) | 2021-04-22 | 2021-04-26 | 2021-04-26 |
Severity
6
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:P)
Published
2021-04-22
Added
2021-04-26
Modified
2021-04-26
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.
Solution
mediawiki-upgrade-latest
References
- CVE-2021-31553
- https://attackerkb.com/topics/CVE-2021-31553
- URL-https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963
- URL-https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964
- URL-https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023
- URL-https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024
- URL-https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025
- URL-https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027
- URL-https://phabricator.wikimedia.org/T275669
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