CVE-2023-37962 in Benchmark Evaluator Plugin
Summary
by MITRE • 07/12/2023
A cross-site request forgery (CSRF) vulnerability in Jenkins Benchmark Evaluator Plugin 1.0.1 and earlier allows attackers to connect to an attacker-specified URL and to check for the existence of directories, `.csv`, and `.ycsb` files on the Jenkins controller file system.
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Analysis
by VulDB Data Team • 08/02/2023
The CVE-2023-37962 vulnerability represents a critical cross-site request forgery flaw within the Jenkins Benchmark Evaluator Plugin version 1.0.1 and earlier. This vulnerability exists in the plugin's handling of user requests and lacks proper validation mechanisms for cross-site origin requests. The flaw allows authenticated attackers with sufficient privileges to manipulate the plugin's functionality in ways that can expose sensitive information about the Jenkins controller's file system structure. The vulnerability stems from insufficient input sanitization and validation of user-supplied parameters that are processed by the plugin's internal request handling mechanisms.
The technical implementation of this CSRF vulnerability enables attackers to construct malicious requests that target the Jenkins controller's file system enumeration capabilities. When an authenticated user visits a malicious website or clicks on a crafted link, the plugin executes requests against the controller's file system without proper authorization checks. The vulnerability specifically allows for directory traversal and file existence checks against common benchmark data files such as .csv and .ycsb extensions, which are typically used in performance testing and benchmarking scenarios. This functionality, when exposed through CSRF, creates a significant information disclosure risk that can reveal the controller's operational environment and potentially sensitive file structures.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with reconnaissance capabilities that can be leveraged for more sophisticated attacks. By enumerating directory structures and identifying specific file types, attackers can gain insights into the Jenkins environment's configuration, potentially identifying other vulnerable components or sensitive data locations. This reconnaissance capability aligns with attack patterns described in the ATT&CK framework under the reconnaissance phase, where adversaries gather information about the target environment before executing more destructive operations. The vulnerability particularly affects environments where Jenkins serves as a central automation platform, making it a prime target for attackers seeking to understand system configurations and identify potential attack vectors.
Security mitigations for this vulnerability should focus on implementing proper CSRF protection mechanisms within the Jenkins plugin. The recommended approach includes implementing robust anti-CSRF token validation for all user-facing plugin endpoints, ensuring that requests originate from legitimate sources within the same origin. Organizations should immediately upgrade to the patched version of the Jenkins Benchmark Evaluator Plugin, as the vulnerability affects versions prior to 1.0.2. Additionally, implementing proper input validation and sanitization measures, combined with origin validation checks, will prevent unauthorized access to file system enumeration capabilities. The vulnerability classification aligns with CWE-352, which specifically addresses cross-site request forgery weaknesses in software applications, making it essential for organizations to apply the security patches promptly and verify that their Jenkins environments are not vulnerable to similar CSRF attacks in other plugins or components.