CVE-2020-13308 : Security Advisory and Response

A vulnerability in GitLab versions before 13.1.10, 13.2.8, and 13.3.4 could allow a user without 2-factor authentication to be blocked from accessing GitLab.

Understanding CVE-2020-13308

This CVE involves a security issue in GitLab that affects certain versions, potentially impacting user access.

What is CVE-2020-13308?

CVE-2020-13308 is a vulnerability found in GitLab versions prior to 13.1.10, 13.2.8, and 13.3.4. It could prevent users without 2-factor authentication from accessing GitLab if invited to a project with 2-factor authentication inheritance.

The Impact of CVE-2020-13308

The vulnerability poses a low severity risk with a CVSS base score of 2.7. It requires high privileges but has low confidentiality and integrity impacts, affecting network availability.

Technical Details of CVE-2020-13308

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability prevents users without 2-factor authentication from accessing GitLab when invited to a project with 2-factor authentication inheritance.

Affected Systems and Versions

Product: GitLab
Vendor: GitLab
Affected Versions: >=1.0, <13.1.10, >=13.2, <13.2.8, >=13.3, <13.3.4

Exploitation Mechanism

The vulnerability can be exploited by inviting a user without 2-factor authentication to a project with 2-factor authentication inheritance, resulting in access denial.

Mitigation and Prevention

Protecting systems from CVE-2020-13308 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected GitLab instances to versions 13.1.10, 13.2.8, or 13.3.4 to mitigate the vulnerability.
Enable 2-factor authentication for all users to enhance security.

Long-Term Security Practices

Regularly review and update security configurations in GitLab.
Educate users on the importance of 2-factor authentication and best security practices.

Patching and Updates

Stay informed about security patches and updates released by GitLab.
Apply patches promptly to ensure systems are protected from known vulnerabilities.