CVE-2022-1188 in Community Edition
Summary
by MITRE • 04/05/2022
An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.1 before 14.7.7, all versions starting from 14.8 before 14.8.5, all versions starting from 14.9 before 14.9.2 where a blind SSRF attack through the repository mirroring feature was possible.
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Analysis
by VulDB Data Team • 04/06/2022
The vulnerability identified as CVE-2022-1188 represents a critical security flaw within GitLab Community Edition and Enterprise Edition platforms that has persisted across multiple version ranges. This issue specifically targets the repository mirroring functionality, which is a core feature enabling users to synchronize repositories between different GitLab instances or external systems. The vulnerability manifests as a blind server-side request forgery attack vector that allows remote attackers to initiate HTTP requests from the GitLab server to internal or external systems without proper authorization or validation. The affected versions span from 12.1 through 14.7.6, 14.8 through 14.8.4, and 14.9 through 14.9.1, indicating a prolonged window of exposure for organizations utilizing these platforms.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the repository mirroring configuration parameters. When administrators configure repository mirroring, they typically specify URLs for source and target repositories. The flaw occurs when these URLs are processed without proper validation of their scheme, host, or path components, allowing attackers to craft malicious URLs that bypass normal access controls. This blind SSRF condition means that while attackers cannot directly observe the responses from the targeted systems, they can still leverage the GitLab server to perform reconnaissance, access internal services, or potentially exfiltrate data from behind firewalls. The vulnerability operates at the network level, exploiting the trust relationship between the GitLab server and its configured mirroring endpoints.
The operational impact of this vulnerability extends beyond simple data exposure, as it creates opportunities for attackers to escalate their privileges and conduct more sophisticated attacks within the organization's infrastructure. An attacker could potentially use this vulnerability to scan internal networks, probe for vulnerable services, or even access other internal GitLab instances that might be configured with weak security controls. The blind nature of the attack makes detection particularly challenging for security teams, as network monitoring tools may not immediately identify the malicious traffic patterns. Organizations running affected GitLab versions face significant risk of unauthorized access to their source code repositories, internal system information, and potentially sensitive configuration data that could be accessed through the mirrored repository endpoints.
Mitigation strategies for CVE-2022-1188 require immediate action from GitLab administrators to upgrade to patched versions, specifically 14.7.7, 14.8.5, or 14.9.2, depending on their current version. Organizations should also implement network-level restrictions to prevent GitLab servers from accessing unauthorized external endpoints, particularly by configuring firewalls to block outbound connections to internal network ranges from the GitLab instance. Additional protective measures include disabling repository mirroring functionality if not strictly required, implementing strict URL validation for mirroring configurations, and monitoring network traffic for suspicious outbound requests. Security teams should also consider implementing web application firewalls or intrusion detection systems to detect and block potential exploitation attempts. This vulnerability aligns with CWE-918, which addresses server-side request forgery vulnerabilities, and maps to ATT&CK technique T1071.004 for application layer protocol traffic, highlighting the importance of network segmentation and access control policies in preventing such attacks. Organizations should conduct thorough security audits of their GitLab configurations to identify any additional misconfigurations that could compound the risk of exploitation.