CVE-2021-39933
First published: Mon Dec 13 2021(Updated: )
An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.10 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 used for handling user input (notes, comments, etc) was susceptible to catastrophic backtracking that could cause a DOS attack.
Credit: cve@gitlab.com cve@gitlab.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GitLab GitLab | >=12.10.0<14.3.6 | |
| GitLab GitLab | >=12.10.0<14.3.6 | |
| GitLab GitLab | >=14.4.0<14.4.4 | |
| GitLab GitLab | >=14.4.0<14.4.4 | |
| GitLab GitLab | >=14.5.0<14.5.2 | |
| GitLab GitLab | >=14.5.0<14.5.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-39933?
The severity of CVE-2021-39933 is medium with a severity value of 6.5.
How does CVE-2021-39933 affect GitLab CE/EE?
CVE-2021-39933 affects all versions of GitLab CE/EE starting from 12.10 before 14.3.6, all versions starting from 14.4 before 14.4.4, and all versions starting from 14.5 before 14.5.2.
What is the vulnerability description of CVE-2021-39933?
CVE-2021-39933 is a vulnerability in GitLab CE/EE where a regular expression used for handling user input (notes, comments, etc) is susceptible to catastrophic backtracking.
How can I fix CVE-2021-39933?
To fix CVE-2021-39933, it is recommended to upgrade GitLab CE/EE to versions 14.3.6, 14.4.4, or 14.5.2 or later.
Where can I find more information about CVE-2021-39933?
More information about CVE-2021-39933 can be found at the following references: [Reference 1](https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39933.json), [Reference 2](https://gitlab.com/gitlab-org/gitlab/-/issues/340449), [Reference 3](https://hackerone.com/reports/1320077).
- agent/author
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- collector/nvd-api
- agent/software-canonical-lookup-request
- collector/nvd-index
- agent/references
- agent/weakness
- agent/severity
- agent/softwarecombine
- agent/event
- agent/tags
- agent/description
- collector/mitre-cve
- source/MITRE
- vendor/gitlab
- canonical/gitlab gitlab
- version/gitlab gitlab/12.10.0
- version/gitlab gitlab/14.4.0
- version/gitlab gitlab/14.5.0