CVE-2022-34817 in Failed Job Deactivator Plugin
Summary
by MITRE • 06/30/2022
A cross-site request forgery (CSRF) vulnerability in Jenkins Failed Job Deactivator Plugin 1.2.1 and earlier allows attackers to disable jobs.
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Analysis
by VulDB Data Team • 07/18/2022
The CVE-2022-34817 vulnerability represents a critical cross-site request forgery flaw within the Jenkins Failed Job Deactivator Plugin version 1.2.1 and earlier. This vulnerability exists in the web application layer of Jenkins, specifically targeting the plugin's handling of user requests and authentication mechanisms. The flaw allows unauthenticated attackers to manipulate the system's job management functionality through maliciously crafted requests that appear to originate from legitimate users. The vulnerability stems from the plugin's failure to implement proper CSRF protection measures, leaving it susceptible to attacks where an attacker can trick a logged-in user into executing unauthorized actions against the Jenkins server. This represents a significant security risk as it directly impacts the integrity and availability of automated build processes within continuous integration environments. The vulnerability is particularly concerning in enterprise environments where Jenkins serves as a central automation platform for software development workflows.
The technical implementation of this CSRF vulnerability occurs due to the absence of anti-CSRF tokens in the plugin's job deactivation endpoints. When a user navigates to a malicious website or clicks on a crafted link, the attacker can trigger requests to the Jenkins server that automatically execute job deactivation commands without proper user consent or authentication verification. The plugin fails to validate the origin of requests or verify that the actions originate from legitimate administrative interfaces, creating a pathway for unauthorized job modifications. This flaw aligns with CWE-352, which specifically addresses Cross-Site Request Forgery vulnerabilities in web applications. The vulnerability operates at the application layer, exploiting the trust relationship between the web browser and the Jenkins server, and can be leveraged to disable critical build jobs, potentially disrupting development workflows and causing production delays.
The operational impact of this vulnerability extends beyond simple job disabling, as it can severely disrupt continuous integration and deployment pipelines within organizations. Attackers can selectively disable jobs to cause build failures, delay releases, or create confusion within development teams. The vulnerability can be exploited to target specific jobs that are critical to the software delivery process, potentially causing cascading failures throughout the development infrastructure. In environments where Jenkins is used for automated testing, deployment, or monitoring systems, disabling jobs can lead to significant operational disruptions and security implications. The attack surface is particularly wide as any user with access to the Jenkins web interface could be tricked into executing malicious requests, and the vulnerability affects all versions prior to 1.2.2, making it a widespread concern across many Jenkins installations. This type of vulnerability is categorized under ATT&CK technique T1566, which involves the exploitation of web applications through various injection and manipulation techniques.
Organizations should immediately upgrade to Jenkins Failed Job Deactivator Plugin version 1.2.2 or later to remediate this vulnerability, as this release includes proper CSRF token implementation and validation mechanisms. System administrators should also implement additional security controls such as restricting access to Jenkins through network segmentation, implementing strong authentication mechanisms, and monitoring for unauthorized job modifications. The vulnerability demonstrates the importance of proper input validation and request origin verification in web applications, particularly in environments where automated processes are critical to business operations. Security teams should conduct comprehensive audits of all installed Jenkins plugins to identify similar vulnerabilities and ensure that all components maintain current security standards. Additionally, implementing web application firewalls and request filtering mechanisms can provide additional layers of protection against CSRF attacks targeting Jenkins and similar automation platforms.