CVE-2019-18448 in Community Edition
Summary
by MITRE
An issue was discovered in GitLab Community and Enterprise Edition before 12.4. It has Incorrect Access Control.
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Analysis
by VulDB Data Team • 02/28/2024
The vulnerability identified as CVE-2019-18448 represents a critical access control flaw affecting GitLab Community and Enterprise Edition installations prior to version 12.4. This issue stems from improper authorization checks within the application's permission system, creating a pathway for unauthorized users to access restricted resources and functionality. The flaw exists in the core access control mechanisms that govern user privileges and project-level permissions, allowing attackers to bypass intended security boundaries. Such vulnerabilities are particularly dangerous in collaborative development environments where GitLab serves as the central repository for source code and sensitive project information.
The technical implementation of this access control vulnerability manifests through insufficient validation of user permissions when accessing certain project resources. Attackers with lower privilege levels can exploit this weakness to gain access to private repositories, view confidential project data, and potentially execute actions that should be restricted to administrators or specific authorized personnel. The flaw likely resides in the application's authorization logic where it fails to properly verify user roles and permissions before granting access to sensitive operations. This type of vulnerability falls under the CWE-285 category of Improper Authorization, which specifically addresses issues where systems fail to properly enforce access controls. The vulnerability's impact is amplified by GitLab's widespread adoption in enterprise environments where source code security and access control are paramount.
The operational consequences of this vulnerability extend beyond simple unauthorized access to encompass potential data breaches, intellectual property exposure, and compromise of development workflows. Organizations using affected GitLab versions face significant risk of unauthorized code access, which could lead to competitive disadvantage, regulatory compliance violations, and reputational damage. The vulnerability affects the integrity and confidentiality of project data, potentially allowing attackers to modify code, access sensitive configuration files, or extract proprietary information. This weakness particularly impacts organizations that rely on GitLab for managing sensitive source code repositories and collaborative development processes. The ATT&CK framework categorizes this vulnerability under privilege escalation and credential access techniques, as it allows attackers to move laterally within the system by exploiting insufficient access controls.
Mitigation strategies for CVE-2019-18448 require immediate patching of affected GitLab installations to version 12.4 or later, which contains the necessary fixes for the access control implementation. Organizations should also implement additional security measures including regular access control reviews, monitoring for unusual access patterns, and enforcement of least privilege principles. Network segmentation and additional authentication layers can provide defense-in-depth protection while the primary vulnerability is addressed. Security teams should conduct comprehensive audits of user permissions and project access controls to identify any potential exploitation that may have already occurred. The vulnerability highlights the importance of maintaining up-to-date security patches and implementing robust access control monitoring to prevent unauthorized access to critical development resources. Organizations should also consider implementing automated security scanning tools to identify similar access control weaknesses in their GitLab deployments and other application environments.