CVE-2024-9596 in Enterprise Edition
Summary
by MITRE • 10/10/2024
An issue has been discovered in GitLab EE affecting all versions starting from 16.6 prior to 17.2.9, from 17.3 prior to 17.3.5, and from 17.4 prior to 17.4.2. It was possible for an unauthenticated attacker to determine the GitLab version number for a GitLab instance.
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Analysis
by VulDB Data Team • 10/11/2024
This vulnerability in GitLab Enterprise Edition represents a significant information disclosure weakness that undermines the security posture of affected systems. The flaw allows unauthenticated attackers to directly obtain version information from GitLab instances, which serves as a critical reconnaissance step in potential attack scenarios. Such exposure of version numbers provides malicious actors with precise knowledge of the software version in use, enabling them to identify specific vulnerabilities that may exist within that particular release. The vulnerability affects multiple version ranges including 16.6 through 17.2.8, 17.3 through 17.3.4, and 17.4 through 17.4.1, indicating this is not a minor issue but a widespread concern affecting a substantial portion of GitLab Enterprise deployments. This type of information disclosure vulnerability aligns with CWE-200, which specifically addresses the exposure of sensitive information through improper error handling or version identification mechanisms.
The technical implementation of this vulnerability stems from inadequate access controls or improper response handling within GitLab's web server components. When unauthenticated requests are made to specific endpoints or when certain API calls are processed, the system inadvertently reveals version information in HTTP headers, response bodies, or error messages. This behavior violates fundamental security principles of least privilege and defense in depth, as the system should not provide any identifying information to unauthorized users. The flaw essentially creates a backdoor for attackers to gather intelligence without requiring any authentication credentials, making it particularly dangerous for organizations that rely on security through obscurity as a defense mechanism. From an operational perspective, this vulnerability significantly reduces the attack surface complexity for threat actors who can now easily target known vulnerabilities associated with specific GitLab versions.
The operational impact of CVE-2024-9596 extends beyond simple version disclosure, as it enables more sophisticated attack vectors that leverage the exposed version information. Attackers can now correlate the disclosed version with known exploits in databases such as the National Vulnerability Database or exploit frameworks, allowing them to quickly identify and target specific vulnerabilities within the GitLab instance. This vulnerability directly maps to ATT&CK technique T1592, which involves reconnaissance through information discovery, and T1082, which covers system information discovery. Organizations may experience cascading security implications where this initial information disclosure leads to further exploitation attempts, potentially resulting in unauthorized access, data breaches, or system compromise. The vulnerability particularly affects GitLab Enterprise Edition deployments where the attack surface is already expanded due to additional features and components, making the exposure of version information more impactful.
Organizations should prioritize immediate remediation by upgrading to the patched versions 17.2.9, 17.3.5, and 17.4.2 respectively, as these releases contain the necessary code modifications to prevent version information disclosure. Network segmentation and firewall rules should be implemented to restrict access to GitLab endpoints from untrusted networks, though this should not be considered a substitute for proper patching. Monitoring should be enhanced to detect unusual access patterns or repeated requests targeting version information endpoints. Security teams should conduct comprehensive vulnerability assessments to ensure no other information disclosure vulnerabilities exist within their GitLab deployments. Additionally, implementing proper input validation and response handling mechanisms can help prevent similar issues in the future, aligning with security best practices outlined in the OWASP Top Ten and NIST Cybersecurity Framework. The vulnerability demonstrates the critical importance of maintaining up-to-date software versions and implementing robust security controls to prevent information leakage that could facilitate more serious attacks.