CVE-2022-0152 in GitLab
Summary
by MITRE • 01/18/2022
An issue has been discovered in GitLab affecting all versions starting from 13.10 before 14.4.5, all versions starting from 14.5.0 before 14.5.3, all versions starting from 14.6.0 before 14.6.2. GitLab was vulnerable to unauthorized access to some particular fields through the GraphQL API.
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Analysis
by VulDB Data Team • 01/20/2022
The vulnerability identified as CVE-2022-0152 represents a significant authorization flaw within GitLab's GraphQL API implementation that persisted across multiple version ranges including 13.10 through 14.4.4, 14.5.0 through 14.5.2, and 14.6.0 through 14.6.1. This issue stems from inadequate access control mechanisms that allow unauthorized users to retrieve sensitive data fields through GraphQL queries that should have been restricted to authorized personnel only. The flaw specifically affects the GraphQL API endpoint which serves as a critical interface for data retrieval and manipulation within GitLab's ecosystem.
The technical root cause of this vulnerability lies in the improper validation of user permissions within GraphQL query execution. When users submit GraphQL requests to the GitLab API, the system should verify that the requesting user possesses appropriate authorization levels to access specific fields within the queried data structure. However, in affected versions, the authorization checks were insufficiently implemented or bypassed, allowing authenticated users with minimal privileges to access fields that should have been restricted to administrators or project owners. This represents a classic case of insufficient authorization control as categorized under CWE-285, which deals with improper authorization in software systems. The vulnerability manifests when GraphQL queries attempt to access sensitive fields such as repository configurations, user permissions, or system-level information that should remain protected from unauthorized access.
The operational impact of CVE-2022-0152 extends beyond simple data exposure to potentially compromise the integrity and confidentiality of GitLab environments. Attackers exploiting this vulnerability could gain access to detailed project configurations, user access rights, and other sensitive metadata that could facilitate further attacks or provide insights into the overall system architecture. This unauthorized access capability aligns with techniques described in the ATT&CK framework under the T1087.001 tactic for Account Discovery, where adversaries seek to identify and access accounts with elevated privileges or sensitive information. The vulnerability particularly affects organizations using GitLab for code repository management, CI/CD pipeline orchestration, and collaborative development environments where unauthorized access to project metadata could lead to intellectual property exposure or system compromise.
Organizations should immediately implement the patched versions released by GitLab to address this vulnerability, specifically upgrading to GitLab 14.4.5, 14.5.3, or 14.6.2 depending on their current version. The recommended mitigations include comprehensive access control reviews, implementation of additional monitoring for GraphQL API usage patterns, and enforcement of principle of least privilege for all API endpoints. Security teams should also conduct thorough audits of their GitLab configurations to ensure that no unauthorized users have access to sensitive fields through GraphQL queries. Additionally, implementing rate limiting and query complexity monitoring can help detect and prevent abuse of GraphQL endpoints, while regular security assessments should verify that authorization controls are properly enforced throughout the API surface. The vulnerability demonstrates the critical importance of proper access control implementation in modern web applications and highlights the necessity of continuous security validation for API interfaces.