CVE-2020-13294 : Exploit Details and Defense Strategies
Learn about CVE-2020-13294 affecting GitLab versions before 13.0.12, 13.1.6, and 13.2.3. Understand the impact, technical details, and mitigation steps for this improper access control vulnerability.
GitLab before versions 13.0.12, 13.1.6, and 13.2.3 is affected by an improper access control vulnerability that allows access grants to persist even after a user revokes access.
Understanding CVE-2020-13294
In GitLab versions prior to 13.0.12, 13.1.6, and 13.2.3, a flaw existed where access grants were not properly revoked when a user attempted to revoke access to an application.
What is CVE-2020-13294?
This CVE describes an issue in GitLab where access grants were not correctly removed when a user revoked access to an application, potentially leading to unauthorized access.
The Impact of CVE-2020-13294
The vulnerability could allow malicious users to retain access privileges even after access revocation, leading to unauthorized access to sensitive information or functionalities within GitLab.
Technical Details of CVE-2020-13294
GitLab's CVE-2020-13294 vulnerability can be further understood through the following technical details:
Vulnerability Description
The vulnerability in GitLab versions before 13.0.12, 13.1.6, and 13.2.3 allows access grants to persist after a user revokes access, leading to potential unauthorized access.
Affected Systems and Versions
- Product: GitLab
- Vendor: GitLab
- Vulnerable Versions:
=7.7, <13.0.12
=13.1, <13.1.6
=13.2, <13.2.3
Exploitation Mechanism
The vulnerability can be exploited by malicious users to maintain access privileges even after access revocation, potentially compromising the security of GitLab instances.
Mitigation and Prevention
To address CVE-2020-13294 and enhance security, consider the following mitigation strategies:
Immediate Steps to Take
- Upgrade GitLab to versions 13.0.12, 13.1.6, or 13.2.3, where the vulnerability is patched.
- Monitor access controls and permissions to ensure proper revocation of access grants.
Long-Term Security Practices
- Regularly review and update access control policies within GitLab.
- Conduct security training for users to understand the importance of access revocation.
Patching and Updates
- Apply security patches and updates provided by GitLab to address vulnerabilities and enhance system security.