CVE-2020-26411 Explained : Impact and Mitigation
Learn about CVE-2020-26411, a DoS vulnerability in GitLab versions 13.4 to 13.6.2. Understand the impact, affected systems, exploitation mechanism, and mitigation steps to secure your environment.
A potential Denial of Service (DoS) vulnerability affecting GitLab versions 13.4 to 13.6.2 has been discovered. This vulnerability can lead to statement timeouts and potential DoS attacks.
Understanding CVE-2020-26411
This CVE involves a DoS vulnerability in GitLab versions 13.4 to 13.6.2, potentially leading to service disruption.
What is CVE-2020-26411?
- The vulnerability allows for uncontrolled resource consumption in GitLab, triggered by specific project search queries.
- Attackers can exploit this flaw to cause statement timeouts, potentially resulting in DoS attacks.
The Impact of CVE-2020-26411
- CVSS Base Score: 4.3 (Medium Severity)
- Attack Vector: Network
- Attack Complexity: Low
- Availability Impact: Low
- Privileges Required: Low
- Scope: Unchanged
- This vulnerability does not impact confidentiality or integrity.
Technical Details of CVE-2020-26411
This section provides detailed technical information about the vulnerability.
Vulnerability Description
- The vulnerability allows attackers to trigger statement timeouts through specific project search queries, potentially leading to DoS attacks.
Affected Systems and Versions
- Affected Product: GitLab
- Affected Versions:
- GitLab >=13.4, <13.4.7
- GitLab >=13.5, <13.5.5
- GitLab >=13.6, <13.6.2
Exploitation Mechanism
- Attackers can exploit this vulnerability by crafting specific query names for project searches, causing statement timeouts and potential DoS.
Mitigation and Prevention
Protect your systems from CVE-2020-26411 with these mitigation strategies.
Immediate Steps to Take
- Update GitLab to versions 13.4.7, 13.5.5, or 13.6.2 to mitigate the vulnerability.
- Monitor system logs for any unusual query activities that could indicate exploitation.
Long-Term Security Practices
- Regularly update GitLab to the latest versions to patch known vulnerabilities.
- Implement network monitoring to detect and prevent abnormal query behavior.
Patching and Updates
- Apply security patches provided by GitLab promptly to address CVE-2020-26411.