CVE-2021-39919 : Exploit Details and Defense Strategies

This CVE article provides details about a vulnerability affecting GitLab versions.

Understanding CVE-2021-39919

This section delves into the specifics of the CVE-2021-39919 vulnerability.

What is CVE-2021-39919?

In GitLab versions starting from 14.0 before 14.3.6, 14.4 before 14.4.4, and 14.5 before 14.5.2, a security issue exists where reset password tokens and new user email tokens get unintentionally logged, potentially leading to information exposure.

The Impact of CVE-2021-39919

The vulnerability has a base severity of MEDIUM and a CVSS base score of 4.4, with a high impact on confidentiality due to the risk of information disclosure.

Technical Details of CVE-2021-39919

This section explores the technical aspects of the CVE-2021-39919 vulnerability.

Vulnerability Description

The vulnerability allows for the accidental logging of reset password tokens and new user email tokens, opening up possibilities for attackers to access sensitive information.

Affected Systems and Versions

Product: GitLab
Vendor: GitLab
Affected Versions: 14.0 to 14.3.6, 14.4 to 14.4.4, 14.5 to 14.5.2

Exploitation Mechanism

The vulnerability occurs locally with high privileges required, allowing attackers to potentially access logged tokens.

Mitigation and Prevention

Explore the steps to address and prevent the CVE-2021-39919 vulnerability.

Immediate Steps to Take

Upgrade GitLab to version 14.3.6, 14.4.4, or 14.5.2, where the issue is resolved.
Monitor system logs for any abnormal token access.

Long-Term Security Practices

Implement regular security training for staff regarding data protection.
Conduct periodic security audits to identify and address potential vulnerabilities.

Patching and Updates

Apply security patches promptly when new versions are released by GitLab.