CVE-2021-39932 : Vulnerability Insights and Analysis

GitLab has identified a vulnerability in its CE/EE versions that could lead to high load times for users reviewing code changes.

Understanding CVE-2021-39932

This security flaw affects GitLab versions ranging from 11.0 to 14.5.2 and can be exploited using large payloads to impact the diff feature.

What is CVE-2021-39932?

CVE-2021-39932 is a vulnerability in GitLab CE/EE versions that allows for triggering high load times by using large payloads in the diff feature, impacting users reviewing code changes.

The Impact of CVE-2021-39932

The vulnerability has a CVSS base score of 4.3, classified as medium severity, with low attack complexity and network vector. It could result in high load times for users, affecting availability.

Technical Details of CVE-2021-39932

GitLab's vulnerability presents the following technical details:

Vulnerability Description

Uncontrolled resource consumption due to the manipulation of large payloads

Affected Systems and Versions

Affected systems include GitLab CE/EE versions between 11.0 and 14.5.2

Exploitation Mechanism

Triggering high load times by utilizing large payloads through the diff feature

Mitigation and Prevention

To address CVE-2021-39932, follow these steps:

Immediate Steps to Take

Upgrade GitLab to versions 14.3.6, 14.4.4, or 14.5.2 where the vulnerability is patched
Monitor system resources for any unusual load

Long-Term Security Practices

Regularly update GitLab to the latest secure versions
Implement access controls to limit potential exploitation

Patching and Updates

Apply the latest patches provided by GitLab to ensure the vulnerability is mitigated