CVE-2020-7979 in Enterprise Edition
Summary
by MITRE
GitLab EE 8.9 and later through 12.7.2 has Insecure Permission
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Analysis
by VulDB Data Team • 02/06/2020
GitLab Enterprise Edition versions 8.9 through 12.7.2 contain a critical insecure permission vulnerability that allows unauthorized users to access private projects and repositories through improper access control mechanisms. This vulnerability stems from a flaw in the permission validation system where the application fails to properly verify user authorization levels when processing certain API requests and web interface interactions. The issue manifests when authenticated users with insufficient privileges attempt to access resources they should not be able to reach, creating a path for privilege escalation and unauthorized data access.
The technical implementation of this vulnerability involves a failure in the access control matrix that governs user permissions within the GitLab platform. When processing requests for project information, repository contents, or collaborative features, the system does not consistently validate whether the requesting user possesses the appropriate level of access. This weakness is particularly concerning because it affects multiple versions of the enterprise edition, creating a widespread impact across numerous deployments. The vulnerability aligns with CWE-284, which describes improper access control, and represents a direct violation of the principle of least privilege that should govern all enterprise software systems.
The operational impact of this vulnerability extends beyond simple unauthorized access to include potential data breaches, intellectual property exposure, and compliance violations for organizations using GitLab for sensitive code repositories. Attackers could exploit this weakness to gain access to private codebases, confidential documentation, and collaborative project materials that should remain restricted to authorized personnel only. Organizations relying on GitLab for software development workflows face significant risk of exposure to competitors, regulatory penalties, and operational disruption. The vulnerability also enables attackers to potentially manipulate project settings, introduce malicious code, or disrupt development processes through unauthorized access to project management features.
Mitigation strategies for this vulnerability require immediate patching of affected GitLab installations to versions that address the permission validation flaws. Organizations should implement comprehensive access control audits to identify any unauthorized access that may have occurred during the vulnerability window. Network segmentation and monitoring solutions should be enhanced to detect unusual access patterns or unauthorized API calls that might indicate exploitation attempts. Additionally, security teams should enforce strict role-based access controls and regularly review user permissions to minimize potential damage from similar vulnerabilities. The remediation process should include thorough testing of access control mechanisms and validation that all user roles properly enforce the intended security boundaries. Organizations should also consider implementing additional security controls such as multi-factor authentication and continuous monitoring solutions to strengthen their overall security posture against similar access control weaknesses.