CVE-2019-18447 in Community Edition
Summary
by MITRE
An issue was discovered in GitLab Community and Enterprise Edition before 12.4. It has Insecure Permissions.
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Analysis
by VulDB Data Team • 02/28/2024
The vulnerability identified as CVE-2019-18447 represents a critical insecure permissions flaw affecting GitLab Community and Enterprise Edition versions prior to 12.4. This issue stems from inadequate access control mechanisms that allow unauthorized users to bypass normal permission checks and gain access to resources they should not be able to access. The vulnerability exists within GitLab's permission system where certain conditions can be exploited to escalate privileges or access restricted project data, repositories, and functionality that should be protected from unauthorized access.
The technical implementation of this insecure permissions flaw manifests when specific API endpoints or administrative functions do not properly validate user permissions before executing sensitive operations. Attackers can exploit this weakness by crafting malicious requests that leverage the flawed permission validation logic to access private projects, view confidential information, or perform administrative actions without proper authorization. The vulnerability is particularly concerning because it operates at the core of GitLab's access control system, potentially allowing attackers to compromise entire project repositories and sensitive code assets. This type of flaw aligns with CWE-284 which specifically addresses improper access control and represents a fundamental breakdown in the principle of least privilege that should govern all software systems.
The operational impact of CVE-2019-18447 extends beyond simple unauthorized access to encompass potential data breaches, intellectual property theft, and system compromise. Organizations utilizing affected GitLab versions face significant risk of unauthorized code access, which could expose sensitive source code, configuration files, and development artifacts to malicious actors. The vulnerability also poses risks to continuous integration and deployment pipelines, as attackers could potentially modify or disrupt automated processes. Additionally, the compromised access could enable attackers to manipulate project settings, add malicious code, or create backdoors within the development environment. This vulnerability directly impacts the security posture of development teams and organizations that rely on GitLab for source code management and collaborative development workflows.
Organizations should immediately upgrade to GitLab version 12.4 or later to remediate this vulnerability, as this represents the official patch release that addresses the insecure permissions issue. System administrators should conduct comprehensive audits of their GitLab installations to identify any potential exploitation attempts and review access logs for suspicious activities. Implementing additional monitoring and alerting mechanisms around sensitive API endpoints can help detect potential exploitation attempts. Security teams should also review and strengthen their overall access control policies, ensuring that proper role-based access controls are implemented and regularly audited. The mitigation strategy should include regular security assessments of development environments and implementation of network segmentation to limit the potential impact of such vulnerabilities. This vulnerability serves as a reminder of the critical importance of maintaining up-to-date software systems and the necessity of robust access control mechanisms in collaborative development environments.