CVE-2021-39942 : Vulnerability Insights and Analysis

A denial of service vulnerability in GitLab affecting versions allows low-privileged users to bypass file size limits in the NPM package repository.

Understanding CVE-2021-39942

This vulnerability impacts GitLab versions below 14.3.6, 14.4.4, and 14.5.2.

What is CVE-2021-39942?

A denial of service vulnerability in GitLab CE/EE
Low-privileged users can bypass file size limits in the NPM package repository

The Impact of CVE-2021-39942

CVSS Score: 4.3 (Medium)
Attack Vector: Network
Scope: Unchanged
Low-privileged users can potentially cause denial of service

Technical Details of CVE-2021-39942

This section provides in-depth technical details of the vulnerability.

Vulnerability Description

Uncontrolled resource consumption in GitLab

Affected Systems and Versions

Affected Product: GitLab
Versions: >=12.0, <14.3.6; >=14.4, <14.4.4; >=14.5, <14.5.2

Exploitation Mechanism

Low-privileged users can bypass file size limits in the NPM package repository

Mitigation and Prevention

Effective measures to mitigate and prevent exploitation of this vulnerability.

Immediate Steps to Take

Update GitLab to versions 14.3.6, 14.4.4, or 14.5.2
Monitor and restrict low-privileged user access

Long-Term Security Practices

Regular security training for users
Implement least privilege access controls

Patching and Updates

Apply security patches promptly