CVE-2021-39917
First published: Mon Dec 13 2021(Updated: )
An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.9 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. A regular expression related to quick actions features was susceptible to catastrophic backtracking that could cause a DOS attack.
Credit: cve@gitlab.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GitLab | >=12.9.0<14.3.6 | |
| GitLab | >=12.9.0<14.3.6 | |
| GitLab | >=14.4.0<14.4.4 | |
| GitLab | >=14.4.0<14.4.4 | |
| GitLab | >=14.5.0<14.5.2 | |
| GitLab | >=14.5.0<14.5.2 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What are the risks associated with CVE-2021-39917?
CVE-2021-39917 can lead to denial of service conditions due to catastrophic backtracking in the regular expression used in quick actions features.
What versions of GitLab are affected by CVE-2021-39917?
CVE-2021-39917 affects GitLab CE/EE versions from 12.9 to before 14.3.6, 14.4 from 14.4.0 to before 14.4.4, and 14.5 from 14.5.0 to before 14.5.2.
How do I fix CVE-2021-39917?
To fix CVE-2021-39917, upgrade GitLab to version 14.3.6, 14.4.4, or 14.5.2 or later.
Is CVE-2021-39917 a critical vulnerability?
CVE-2021-39917 is considered a critical vulnerability due to its potential impact on service availability.
How can administrators mitigate the risk of CVE-2021-39917?
Administrators can mitigate the risk of CVE-2021-39917 by applying the recommended updates to their GitLab instances as soon as possible.
- agent/type
- agent/references
- agent/weakness
- agent/author
- agent/softwarecombine
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/gitlab
- canonical/gitlab
- version/gitlab/12.9.0
- version/gitlab/14.4.0
- version/gitlab/14.5.0