CVE-2023-2233 in Community Edition
Summary
by MITRE • 10/25/2023
An improper authorization issue has been discovered in GitLab CE/EE affecting all versions starting from 11.8 before 16.2.8, all versions starting from 16.3 before 16.3.5 and all versions starting from 16.4 before 16.4.1. It allows a project reporter to leak the owner's Sentry instance projects.
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Analysis
by VulDB Data Team • 10/03/2024
This vulnerability represents a critical authorization flaw in GitLab Community and Enterprise Edition products that has existed across multiple version ranges since 11.8. The issue stems from insufficient access controls that permit unauthorized users to access sensitive project information. Specifically a project reporter role can exploit this weakness to obtain access to a project owner's Sentry instance projects, which contain critical monitoring and error tracking data. This represents a significant escalation of privileges from a reporting user to unauthorized access to sensitive operational data. The vulnerability affects a broad range of GitLab installations and demonstrates a fundamental breakdown in the principle of least privilege within the platform's authorization model.
The technical root cause of this issue lies in the improper validation of user permissions when accessing Sentry integration features within GitLab. When project reporters attempt to interact with Sentry instance projects, the system fails to properly verify whether the requesting user has appropriate authorization levels to access the target resources. This authorization bypass allows users with minimal privileges to traverse access controls and gain visibility into sensitive project data that should only be accessible to project owners or administrators. The flaw operates at the application layer and specifically impacts the integration between GitLab's project management capabilities and Sentry's error monitoring platform. This vulnerability aligns with CWE-285 which addresses improper authorization issues and represents a classic case of insufficient access control validation.
The operational impact of this vulnerability extends beyond simple data exposure to potentially compromise security monitoring and incident response capabilities. Project reporters who can access owner's Sentry projects may gain insights into application errors, system vulnerabilities, and operational weaknesses that could be exploited by malicious actors. The leaked information could include error logs, stack traces, and other debugging information that provides attackers with valuable intelligence for planning further attacks. Organizations relying on Sentry integration for security monitoring face potential exposure of their operational security posture, as the vulnerability enables unauthorized access to critical monitoring data that should remain protected within the owner's administrative boundaries. This issue particularly affects organizations that use GitLab for code management alongside Sentry for error tracking and application monitoring.
Organizations should immediately implement mitigations including updating to the patched versions 16.2.8, 16.3.5, and 16.4.1 respectively for the affected version ranges. The update process should be prioritized as a critical security measure to restore proper access controls. Additionally administrators should review existing access control policies and conduct audits to ensure that no unauthorized access has occurred through this vulnerability. Network segmentation and monitoring should be enhanced to detect any suspicious access patterns to Sentry integration features. Security teams should also consider implementing additional controls such as role-based access restrictions and enhanced logging for sensitive integration points. Organizations may need to re-evaluate their overall security posture and access control configurations to prevent similar authorization bypass vulnerabilities from occurring in other systems. This vulnerability demonstrates the importance of regular security assessments and proper access control implementation across all integration points within development platforms and monitoring tools.