CVE-2021-46149 Denial of service in n/a
Attackers can cause denial of service by submitting very long search keys in MediaWiki's Language Name Search feature.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-46149?
CVE-2021-46149 is a high-severity denial of service vulnerability in Mediawiki Mediawiki, published on 7 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. A denial of service (resource consumption) can be accomplished by searching for a very long key in a Language Name Search.
Weakness: CWE-400
Which versions are affected by CVE-2021-46149?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.35.5, 1.36.3, 1.37.1 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2021-46149?
Upgrade mediawiki to a fixed version for your release line: 1.35.5, 1.36.3 or 1.37.1.
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-2021-46149 being exploited?
There is no known exploitation of CVE-2021-46149 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-46149, GHSA-6438-3865-mcg8.