CVE-2014-3680 in Jenkins
Summary
by MITRE
CloudBees Jenkins before 1.583 and LTS before 1.565.3 allows remote authenticated users with the Job/READ permission to obtain the default value for the password field of a parameterized job by reading the DOM.
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Analysis
by VulDB Data Team • 03/30/2022
This vulnerability exists in CloudBees Jenkins versions prior to 1.583 and LTS versions prior to 1.565.3, representing a significant information disclosure flaw that affects the security posture of continuous integration and deployment systems. The vulnerability specifically targets parameterized jobs within Jenkins, where administrators configure jobs with various parameters including passwords that are often used for authentication purposes in build processes. The flaw allows authenticated users who possess the Job/READ permission to extract sensitive default password values through manipulation of the Document Object Model, which is a client-side scripting interface for web documents.
The technical execution of this vulnerability relies on the improper handling of sensitive data within the Jenkins web interface. When a parameterized job is configured with a password parameter, the system should ensure that sensitive values are not exposed through client-side mechanisms. However, the vulnerability allows attackers to access the default value of password fields by reading the DOM elements that represent these parameters. This occurs because the system fails to properly sanitize or obfuscate sensitive values when rendering the job configuration interface, making it possible for an attacker with minimal privileges to extract this information through standard web browser inspection tools.
The operational impact of this vulnerability is substantial as it enables attackers to obtain default credentials that may be used for various purposes within the Jenkins environment or related systems. Since Jenkins is commonly used as a central hub for build automation, deployment processes, and integration with other systems, access to default password values could potentially lead to privilege escalation within the CI/CD pipeline. Attackers could leverage these credentials to gain access to build artifacts, modify job configurations, or potentially access downstream systems that rely on Jenkins for authentication or authorization. This vulnerability particularly impacts organizations that use default password configurations for their Jenkins jobs, as it removes the security benefit of having these values hidden from unauthorized users.
The vulnerability aligns with CWE-200, which describes "Information Exposure," and represents a specific instance where sensitive data is exposed through improper access controls within web applications. From an ATT&CK framework perspective, this vulnerability maps to T1566.001 "Phishing via Service" and T1078.004 "Valid Accounts: Cloud Accounts" as it enables attackers to obtain valid credentials that can be used for further compromise within cloud-based CI/CD environments. Organizations using Jenkins should implement immediate mitigations including upgrading to patched versions, implementing proper access controls, and ensuring that password parameters are properly configured to prevent information disclosure. Additionally, regular security assessments of Jenkins configurations and monitoring for unauthorized access attempts should be implemented to prevent exploitation of this vulnerability.
Organizations should also consider implementing additional security measures such as restricting access to job configuration pages, implementing role-based access controls, and ensuring that sensitive information is properly masked in web interfaces. The vulnerability demonstrates the importance of proper input validation and output sanitization in web applications, particularly when dealing with sensitive data. Regular patch management processes should be established to ensure timely updates of Jenkins installations and other critical infrastructure components to prevent exploitation of known vulnerabilities.