What is CVE-2023-3909?

CVE-2023-3909 is a vulnerability in GitLab that allows for uncontrolled resource consumption.

Which versions of GitLab are affected by CVE-2023-3909?

All versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, and version 16.5.0 are affected by CVE-2023-3909.

What is the severity of CVE-2023-3909?

CVE-2023-3909 has a severity value of 6.5, which is considered medium.

How can I fix CVE-2023-3909?

To fix CVE-2023-3909, update GitLab to version 16.3.6, 16.4.2, or 16.5.1.

Where can I find more information about CVE-2023-3909?

You can find more information about CVE-2023-3909 on the GitLab issue page (https://gitlab.com/gitlab-org/gitlab/-/issues/418763) and the HackerOne report (https://hackerone.com/reports/2050269).

Vulnerability/
CVE-2023-3909

medium

6.5

CWE

1333

6/11/2023

8/10/2024

CVE-2023-3909: Inefficient Regular Expression Complexity in GitLab

First published: Mon Nov 06 2023(Updated: )

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, all versions starting from 16.5 before 16.5.1. A Regular Expression Denial of Service was possible by adding a large string in timeout input in gitlab-ci.yml file.

Credit: cve@gitlab.com

Affected Software	Affected Version	How to fix
GitLab GitLab	>=12.3.0<16.3.6
GitLab GitLab	>=12.3.0<16.3.6
GitLab GitLab	>=16.4.0<16.4.2
GitLab GitLab	>=16.4.0<16.4.2
GitLab GitLab	=16.5.0
GitLab GitLab	=16.5.0

Remedy

Upgrade to version 16.5.1, 16.4.2, 16.3.6

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is CVE-2023-3909?
CVE-2023-3909 is a vulnerability in GitLab that allows for uncontrolled resource consumption.
Which versions of GitLab are affected by CVE-2023-3909?
All versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, and version 16.5.0 are affected by CVE-2023-3909.
What is the severity of CVE-2023-3909?
CVE-2023-3909 has a severity value of 6.5, which is considered medium.
How can I fix CVE-2023-3909?
To fix CVE-2023-3909, update GitLab to version 16.3.6, 16.4.2, or 16.5.1.
Where can I find more information about CVE-2023-3909?
You can find more information about CVE-2023-3909 on the GitLab issue page (https://gitlab.com/gitlab-org/gitlab/-/issues/418763) and the HackerOne report (https://hackerone.com/reports/2050269).

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version/gitlab gitlab/16.4.0
version/gitlab gitlab/16.5.0

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