PT-2021-23412 · Mediawiki+1 · Mediawiki+1

Published 2021-10-01 · Updated 2024-03-06 · CVE-2021-41799

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions MediaWiki versions prior to 1.36.2

Description The issue allows for a denial of service due to resource consumption caused by lengthy query processing time. This can be triggered through the ApiQueryBacklinks endpoint, specifically with the action=query&list=backlinks query, which can cause a full table scan.

Recommendations For versions prior to 1.36.2, update to version 1.36.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the ApiQueryBacklinks endpoint or limiting the use of the action=query&list=backlinks query to minimize the risk of exploitation.

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

ALT-PU-2021-3561

ALT-PU-2022-1199

BIT-MEDIAWIKI-2021-41799

CVE-2021-41799

DLA-2779-1

DSA-4979-1

MGASA-2021-0477

Affected Products

Alt Linux

Mediawiki

References · 26

• https://security.gentoo.org/glsa/202305-24 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-41799 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-41799 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0477 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-41799 · Vendor Advisory
• https://debian.org/security/2021/dsa-4979 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA · Vendor Advisory
• https://osv.dev/vulnerability/BIT-mediawiki-2021-41799 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-41799 · Security Note
• https://osv.dev/vulnerability/DLA-2779-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-41799 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-41799 · Vendor Advisory