CVE-2022-1100 Denial of service in GitLab

Medium 4.3 Published 4 Apr 2022 Updated 2 Aug 2024

An attacker can cause high CPU usage and denial of service in GitLab by submitting specific values to the release asset link update API.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2022-1100?

CVE-2022-1100 is a medium-severity denial of service vulnerability in Gitlab Gitlab, published on 4 Apr 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A potential DOS vulnerability was discovered in GitLab CE/EE affecting all versions from 13.1 prior to 14.7.7, 14.8.0 prior to 14.8.5, and 14.9.0 prior to 14.9.2. The api to update an asset as a link from a release had a regex check which caused exponential number of backtracks for certain user supplied values resulting in high CPU usage.

Weakness: CWE-772

Which versions are affected by CVE-2022-1100?

1 open source package ship an affected version, including gitlab. It affects 1 product.

Package	Affected	Fixed in
`gitlab` Bitnami	From `13.1.0`	`14.7.7, 14.8.5, 14.9.2`

Products include Gitlab Gitlab.

How do I fix CVE-2022-1100?

Upgrade gitlab to a fixed version for your release line: 14.7.7, 14.8.5 or 14.9.2.

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-2022-1100 being exploited?

There is no known exploitation of CVE-2022-1100 in the wild and no public exploit code.

All Gitlab Gitlab vulnerabilities

Sources

Also known as BIT-gitlab-2022-1100, GHSA-fr4g-hmc7-w66h, UBUNTU-CVE-2022-1100.