CVE-2021-41799 Denial of service in n/a

What is CVE-2021-41799?

CVE-2021-41799 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 11 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-770

Which versions are affected by CVE-2021-41799?

1 open source package ship an affected version, including mediawiki. It affects 2 products.

Products include Fedoraproject Fedora, Mediawiki Mediawiki.

How do I fix CVE-2021-41799?

Upgrade mediawiki to 1.36.2 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-41799 being exploited?

There is no known exploitation of CVE-2021-41799 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-mediawiki-2021-41799, DEBIAN-CVE-2021-41799, GHSA-h7pp-5ppj-95mv, UBUNTU-CVE-2021-41799.