CVE-2022-3726 in Community Edition
Summary
by MITRE • 11/10/2022
Lack of sand-boxing of OpenAPI documents in GitLab CE/EE affecting all versions from 12.6 prior to 15.3.5, 15.4 prior to 15.4.4, and 15.5 prior to 15.5.2 allows an attacker to trick a user to click on the Swagger OpenAPI viewer and issue HTTP requests that affect the victim's account.
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Analysis
by VulDB Data Team • 12/11/2022
The vulnerability identified as CVE-2022-3726 represents a critical security flaw in GitLab Community and Enterprise editions that undermines the sandboxing mechanisms designed to protect users from malicious OpenAPI documents. This issue affects versions prior to specific patch releases including 15.3.5, 15.4.4, and 15.5.2, creating a window of exposure where user accounts remain vulnerable to unauthorized actions. The flaw specifically targets the OpenAPI viewer functionality within GitLab's web interface, which is commonly used for documenting and testing api endpoints.
The technical implementation of this vulnerability stems from insufficient sandboxing controls within GitLab's OpenAPI document handling system. When users navigate to the Swagger OpenAPI viewer, the application fails to properly isolate the execution environment of potentially malicious documents. This lack of proper isolation allows attackers to craft specially designed OpenAPI specifications that can execute arbitrary HTTP requests against the victim's GitLab account. The vulnerability operates through the principle of cross-site request forgery combined with document execution, where the viewer itself becomes an attack vector rather than a protective mechanism.
The operational impact of CVE-2022-3726 extends beyond simple data theft or account compromise, as it enables attackers to perform authenticated actions on behalf of victims. This includes but is not limited to creating new projects, modifying existing repositories, accessing private code, and potentially escalating privileges within the GitLab instance. The attack requires social engineering to convince users to click on malicious links or open compromised OpenAPI documents, making it particularly dangerous in environments where developers frequently interact with various API documentation. The vulnerability affects both individual users and organizations that rely on GitLab for version control and collaboration, potentially leading to significant security breaches and intellectual property exposure.
Mitigation strategies for this vulnerability involve applying the appropriate security patches released by GitLab for versions 15.3.5, 15.4.4, and 15.5.2 respectively, which implement proper sandboxing controls for OpenAPI document execution. Organizations should also implement network-level controls to monitor and restrict access to potentially malicious documents, while security teams should conduct thorough audits of existing OpenAPI documents within their GitLab instances. Additionally, user education regarding the risks of clicking on untrusted links or documents, combined with implementing multi-factor authentication for critical accounts, provides additional layers of protection against exploitation of this vulnerability. This issue aligns with CWE-79 and CWE-352 categories related to cross-site scripting and cross-site request forgery respectively, and maps to ATT&CK techniques involving initial access through malicious documents and privilege escalation through authenticated sessions.