CVE-2017-1000404 in Delivery Pipeline Plugin
Summary
by MITRE
The Jenkins Delivery Pipeline Plugin version 1.0.7 and earlier used the unescaped content of the query parameter 'fullscreen' in its JavaScript, resulting in a cross-site scripting vulnerability through specially crafted URLs.
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Analysis
by VulDB Data Team • 02/01/2021
The Jenkins Delivery Pipeline Plugin vulnerability CVE-2017-1000404 represents a critical cross-site scripting flaw that emerged from improper input validation and output escaping mechanisms within the plugin's javascript implementation. This vulnerability affected versions 1.0.7 and earlier, where the plugin failed to properly sanitize user-supplied data before incorporating it into dynamic javascript code execution contexts. The specific flaw occurred when the plugin processed the query parameter 'fullscreen' without adequate escaping or validation, allowing malicious actors to inject arbitrary javascript code that would execute within the context of authenticated users' browsers. The vulnerability stems from a fundamental failure in the plugin's data handling processes, where user-controllable input directly influenced client-side script generation without proper security controls.
The technical exploitation of this vulnerability occurs through carefully crafted URLs that contain malicious javascript payloads within the fullscreen parameter. When an authenticated user clicked on such a malicious link, the javascript code would execute in their browser session, potentially leading to session hijacking, credential theft, or other malicious activities. The vulnerability specifically aligns with CWE-79, which describes improper neutralization of input during web page generation, and represents a classic example of reflected cross-site scripting where the malicious input is immediately reflected back to the user without proper sanitization. This type of vulnerability enables attackers to bypass standard security controls by leveraging the trust relationship between the user and the vulnerable web application, making it particularly dangerous in enterprise environments where Jenkins is commonly used for continuous integration and deployment processes.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to escalate privileges within the Jenkins environment and potentially gain access to sensitive build artifacts, source code repositories, and deployment configurations. Attackers could leverage this vulnerability to establish persistent access points within CI/CD pipelines, potentially compromising the entire software development lifecycle. The vulnerability affects Jenkins administrators who may unknowingly click on malicious links shared through collaboration tools or phishing campaigns, making it particularly challenging to defend against. Organizations using Jenkins Delivery Pipeline Plugin versions prior to the patched release face significant risk of unauthorized access to their build infrastructure, as the vulnerability allows attackers to execute code with the privileges of authenticated users. The impact is compounded by the fact that Jenkins is often integrated with various authentication systems and access control mechanisms, making successful exploitation potentially devastating for organizations relying on automated deployment processes.
Mitigation strategies for this vulnerability primarily involve immediate patching of the Jenkins Delivery Pipeline Plugin to versions that properly escape and validate user input before incorporating it into javascript contexts. System administrators should also implement web application firewalls and content security policies to detect and block malicious javascript payloads, while conducting regular security audits of installed plugins to identify similar vulnerabilities. Organizations should enforce strict access controls and monitoring of user activities within Jenkins environments, particularly around plugin usage and URL handling. The vulnerability demonstrates the critical importance of input validation and output escaping in web applications, aligning with ATT&CK technique T1211 for exploiting weaknesses in web applications. Regular security training for developers and administrators regarding secure coding practices, including proper parameter validation and output encoding, remains essential for preventing similar vulnerabilities from emerging in other components of the Jenkins ecosystem or related applications.