CVE-2021-39913 : Security Advisory and Response
Discover the details of CVE-2021-39913, a vulnerability in GitLab versions <14.2.6, >=14.3, and >=14.4. Learn about the impact, affected systems, and mitigation steps.
This CVE article provides details about a vulnerability in GitLab versions that could lead to an attacker obtaining system root-level privileges.
Understanding CVE-2021-39913
This section gives insight into the impact and technical details of the CVE.
What is CVE-2021-39913?
The vulnerability involves accidental logging of the system root password in the migration log of GitLab versions before 14.2.6, between 14.3 and 14.3.4, and between 14.4 and 14.4.1. This allows attackers with local file system access to gain system root-level privileges.
The Impact of CVE-2021-39913
The CVSS v3.1 base score for this vulnerability is 4.4 (Medium severity), with a high impact on confidentiality. The attack complexity is low, requiring high privileges and no user interaction.
Technical Details of CVE-2021-39913
This section dives into the vulnerability description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability results in the accidental logging of the system root password in GitLab migration logs, potentially offering attackers root-level access.
Affected Systems and Versions
- GitLab versions <14.2.6
- GitLab versions >=14.3 and <14.3.4
- GitLab versions >=14.4 and <14.4.1
Exploitation Mechanism
Attackers with local file system access can exploit this vulnerability to obtain system root-level privileges.
Mitigation and Prevention
Learn the necessary steps to secure your systems after the discovery of CVE-2021-39913.
Immediate Steps to Take
- Upgrade GitLab to version 14.2.6 or newer if using an affected version
- Monitor and restrict access to system files to prevent unauthorized access
- Implement strong access controls and user permissions
Long-Term Security Practices
- Regularly review and update logging mechanisms to prevent sensitive data leakage
- Conduct security training for personnel to raise awareness about logging practices
Patching and Updates
Apply patches and updates provided by GitLab promptly to fix the vulnerability and enhance system security.