CVE-2020-2280 in Warnings Plugin
Summary
by MITRE
A cross-site request forgery (CSRF) vulnerability in Jenkins Warnings Plugin 5.0.1 and earlier allows attackers to execute arbitrary code.
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Analysis
by VulDB Data Team • 09/23/2020
The CVE-2020-2280 vulnerability represents a critical cross-site request forgery flaw within the Jenkins Warnings Plugin version 5.0.1 and earlier releases. This vulnerability resides in the web application's authentication and authorization mechanisms, specifically affecting the plugin's handling of user requests and session management. The issue stems from insufficient validation of request origins and lack of proper anti-CSRF token implementation, creating a pathway for malicious actors to exploit the system's trust model. Security researchers identified that the plugin failed to adequately verify the source of incoming requests, allowing attackers to craft malicious requests that would be executed with the privileges of authenticated users.
The technical exploitation of this CSRF vulnerability occurs through the manipulation of HTTP requests that target the Jenkins Warnings Plugin interface. Attackers can construct specially crafted web pages or email attachments that, when visited by an authenticated user, automatically submit requests to the vulnerable plugin endpoint. The flaw enables attackers to perform actions such as modifying warning configurations, adding new warning rules, or potentially executing arbitrary code within the Jenkins environment. This vulnerability operates under the Common Weakness Enumeration category CWE-352, which specifically addresses cross-site request forgery weaknesses in web applications. The attack vector leverages the principle that authenticated users trust the application's responses and automatically process requests without proper validation of the request's legitimacy.
The operational impact of CVE-2020-2280 extends beyond simple data manipulation to potentially compromise entire Jenkins environments. When exploited successfully, attackers can gain persistent access to the build server, modify continuous integration pipelines, and potentially escalate privileges to execute arbitrary commands on the underlying system. The vulnerability affects organizations that rely on Jenkins for automated builds and deployment processes, making it particularly dangerous in enterprise environments where Jenkins serves as a central hub for software development operations. The attack can result in unauthorized code execution, data corruption, and potential exfiltration of sensitive information from development environments. This vulnerability aligns with ATT&CK technique T1059.001 for command and script injection, as well as T1566 for phishing attacks that leverage CSRF exploits to gain initial access.
Organizations should immediately implement mitigations including updating to Jenkins Warnings Plugin version 5.0.2 or later, which contains the necessary patches to address the CSRF vulnerability. The recommended approach involves configuring proper anti-CSRF tokens for all state-changing operations within the plugin interface and implementing strict origin validation checks. Network administrators should also consider implementing additional security controls such as web application firewalls that can detect and block suspicious request patterns. Security teams should conduct comprehensive audits of their Jenkins installations to identify all potentially affected plugins and ensure that proper access controls are in place. The vulnerability demonstrates the critical importance of maintaining up-to-date software components and implementing robust authentication mechanisms to prevent exploitation of known security flaws. Regular security assessments and vulnerability scanning should be performed to identify similar weaknesses in other Jenkins plugins and the overall system architecture.