CVE-2019-19086 in Enterprise Edition
Summary
by MITRE
Gitlab Enterprise Edition (EE) before 12.5.1 has Insecure Permissions (issue 1 of 2).
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 01/03/2020
Gitlab Enterprise Edition versions prior to 12.5.1 contained a critical insecure permissions vulnerability that allowed unauthorized users to access protected resources within the platform. This vulnerability specifically affected the permission model implementation within the application's access control mechanisms, creating a scenario where users with insufficient privileges could potentially view or interact with content they should not have access to. The flaw existed in the way Gitlab handled user permissions for certain project and repository operations, particularly impacting the visibility and access controls for sensitive data within enterprise environments.
The technical nature of this vulnerability stems from improper validation of user roles and access levels when processing requests for specific resources. Attackers could exploit this weakness to bypass intended access restrictions by crafting malicious requests that would be processed without proper permission checks. This issue falls under the CWE-284 access control weakness category, specifically representing an improper access control implementation that allows unauthorized access to protected resources. The vulnerability was particularly concerning in enterprise deployments where multiple teams and users interact with various projects and repositories, as it could enable data leakage or unauthorized modifications to critical codebases and configuration files.
The operational impact of this vulnerability was significant for organizations relying on Gitlab EE for their source code management and collaboration needs. Security breaches could result in unauthorized access to proprietary code, sensitive configuration files, and confidential project information. Attackers could potentially access private repositories, view confidential documentation, and in some cases modify code without proper authorization. This vulnerability directly impacted the principle of least privilege that organizations implement to protect their intellectual property and maintain secure development practices. The risk was amplified in environments where Gitlab served as a central hub for multiple development teams and projects, as a single compromised account could potentially expose large portions of an organization's codebase.
Organizations affected by this vulnerability were strongly advised to upgrade to Gitlab EE version 12.5.1 or later, which included proper access control fixes and enhanced permission validation mechanisms. Security teams should have conducted immediate assessments of their Gitlab installations to identify any potential exploitation attempts and implemented additional monitoring controls. The mitigation strategy involved not only the mandatory software upgrade but also a review of existing access controls and user permissions within the platform. This vulnerability highlighted the importance of regular security updates and proper access control implementation in collaborative development environments. Organizations should have also considered implementing additional security layers such as network segmentation and enhanced monitoring to detect unauthorized access attempts. The incident underscored the critical need for maintaining up-to-date security practices and the importance of following security advisories from software vendors to prevent exploitation of known vulnerabilities.