CVE-2021-41799
First published: Mon Oct 11 2021(Updated: )
MediaWiki before 1.36.2 allows a denial of service (resource consumption because of lengthy query processing time). ApiQueryBacklinks (action=query&list=backlinks) can cause a full table scan.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/mediawiki | 1:1.31.16-1+deb10u2 1:1.31.16-1+deb10u6 1:1.35.11-1~deb11u1 1:1.35.13-1~deb11u1 1:1.39.4-1~deb12u1 1:1.39.5-1~deb12u1 1:1.39.5-1 | |
| MediaWiki | <1.36.2 | |
| Fedora | =33 | |
| Fedora | =34 | |
| Fedora | =35 |
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Reference Links
- https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/2IFS5CM2YV4VMSODPX3J2LFHKSEWVFV5/
- https://phabricator.wikimedia.org/T290379
- https://security-tracker.debian.org/tracker/CVE-2021-41799
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX/
- https://phabricator.wikimedia.org/T290394
- https://security.gentoo.org/glsa/202305-24
- https://lists.wikimedia.org/hyperkitty/list/wikitech-l%40lists.wikimedia.org/thread/2IFS5CM2YV4VMSODPX3J2LFHKSEWVFV5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/
Frequently Asked Questions
What is the severity of CVE-2021-41799?
CVE-2021-41799 has a denial of service impact due to excessive resource consumption from lengthy query processing.
How do I fix CVE-2021-41799?
To fix CVE-2021-41799, update your MediaWiki installation to version 1.36.2 or later.
What versions of MediaWiki are affected by CVE-2021-41799?
CVE-2021-41799 affects MediaWiki versions below 1.36.2.
What is the main exploitation vector for CVE-2021-41799?
The main exploitation vector for CVE-2021-41799 is through the ApiQueryBacklinks function, which can lead to a full table scan.
Is CVE-2021-41799 specific to any operating system?
CVE-2021-41799 affects multiple operating systems, including Debian and Fedora versions up to specific releases.
- collector/security-tracker-debian
- agent/type
- agent/weakness
- agent/severity
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/first-publish-date
- agent/last-modified-date
- agent/author
- agent/event
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/debian
- vendor/mediawiki
- canonical/mediawiki
- vendor/fedoraproject
- canonical/fedora
- version/fedora/33
- version/fedora/34
- version/fedora/35