CVE-2023-37954 in Rebuilder Plugin
Summary
by MITRE • 07/12/2023
A cross-site request forgery (CSRF) vulnerability in Jenkins Rebuilder Plugin 320.v5a_0933a_e7d61 and earlier allows attackers to rebuild a previous build.
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Analysis
by VulDB Data Team • 08/02/2023
The cross-site request forgery vulnerability identified as CVE-2023-37954 affects the Jenkins Rebuilder Plugin version 320.v5a_0933a_e7d61 and earlier, presenting a significant security risk to Jenkins continuous integration environments. This vulnerability resides within the plugin's handling of rebuild requests, where proper authentication and authorization mechanisms are insufficiently implemented. The flaw allows unauthenticated or unauthorized users to manipulate the rebuild functionality through crafted malicious requests, potentially enabling them to trigger unwanted build operations within the Jenkins infrastructure.
The technical implementation of this CSRF vulnerability stems from the absence of proper anti-CSRF token validation within the rebuild endpoint. When a user navigates to a malicious website or clicks on a crafted link, the attacker can construct a request that automatically triggers a rebuild operation on the target Jenkins instance. This occurs because the plugin fails to validate that the request originates from a legitimate source within the Jenkins environment, instead relying solely on the presence of valid session cookies or authentication tokens that can be easily forged or manipulated through cross-site scripting techniques.
The operational impact of this vulnerability extends beyond simple unauthorized rebuild operations, as it can potentially lead to resource exhaustion, unauthorized code execution, or disruption of continuous integration workflows. Attackers could repeatedly trigger rebuilds to consume system resources, cause build failures, or even execute malicious code if the rebuild process includes untrusted input handling. The vulnerability particularly affects environments where Jenkins instances are accessible from untrusted networks or where users may inadvertently visit malicious websites while authenticated to Jenkins, creating a dangerous attack surface that could be exploited for broader system compromise.
This vulnerability maps directly to CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in software applications. The ATT&CK framework categorizes this as a technique under T1213 - Data from Information Repositories, where the adversary gains unauthorized access to build artifacts and system resources through manipulation of the CI/CD pipeline. Organizations using affected Jenkins versions should immediately implement mitigations including updating to the patched plugin version, implementing proper CSRF token validation, and ensuring that Jenkins instances are properly secured through network segmentation and access controls. The vulnerability demonstrates the critical importance of validating all user interactions in web applications, particularly within CI/CD environments where automated operations can have far-reaching consequences when compromised.