CVE-2021-22188 : Security Advisory and Response

An issue has been discovered in GitLab affecting all versions starting with 13.0. This vulnerability allowed unauthorized users to read confidential issue titles in GitLab through branch logs.

Understanding CVE-2021-22188

This section covers the details of the CVE-2021-22188 vulnerability.

What is CVE-2021-22188?

CVE-2021-22188 is a vulnerability found in GitLab versions starting from 13.0, where confidential issue titles were exposed to unauthorized users via branch logs.

The Impact of CVE-2021-22188

The impact of this vulnerability is rated as medium severity. It has a CVSS base score of 5.3, with low confidentiality impact and no integrity impact. The attack vector is through the network with low attack complexity.

Technical Details of CVE-2021-22188

This section provides technical details of the CVE-2021-22188 vulnerability.

Vulnerability Description

The vulnerability allowed unauthorized users to access confidential issue titles in GitLab through branch logs, potentially exposing sensitive information.

Affected Systems and Versions

GitLab versions >=13.0 and <13.6.7, >=13.7 and <13.7.7, >=13.8 and <13.8.4 are affected by this vulnerability.

Exploitation Mechanism

Unauthorized users could exploit this vulnerability by accessing branch logs in GitLab to read confidential issue titles.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent exploitation of CVE-2021-22188.

Immediate Steps to Take

GitLab users are advised to update their systems to versions that have patched this vulnerability. Access controls should be reviewed to prevent unauthorized access.

Long-Term Security Practices

Regular security audits and monitoring of access controls are recommended to identify and address vulnerabilities proactively.

Patching and Updates

Ensure that GitLab software is kept up to date with the latest security patches to prevent exploitation of known vulnerabilities.