CVE-2013-6374 in Build Failure Analyzer Plugin
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Build Failure Analyzer plugin before 1.5.1 for CloudBees Jenkins allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 06/15/2017
The Cross-site scripting vulnerability identified as CVE-2013-6374 affects the Build Failure Analyzer plugin for CloudBees Jenkins versions prior to 1.5.1, representing a critical security flaw that enables remote authenticated attackers to execute malicious web scripts or HTML code within the context of affected systems. This vulnerability resides within the plugin's handling of user-supplied input data during build failure analysis operations, creating an exploitable entry point for attackers who have already gained authentication credentials within the Jenkins environment. The flaw specifically manifests in the plugin's insufficient sanitization of input parameters that are subsequently rendered in web interfaces without proper encoding or validation mechanisms. Such vulnerabilities fall under the CWE-79 category of Cross-site Scripting, which is classified as a fundamental web application security weakness that allows attackers to inject client-side scripts into web pages viewed by other users. The attack vector leverages the fact that authenticated users can manipulate the plugin's functionality to inject malicious payloads through build failure reports or analysis data, potentially compromising the integrity of the Jenkins environment and the data processed within it. The operational impact of this vulnerability extends beyond simple script injection, as it could enable attackers to escalate privileges, steal session cookies, perform unauthorized actions within the Jenkins interface, or redirect users to malicious websites. The vulnerability represents a significant risk to organizations relying on Jenkins for continuous integration and deployment processes, as it could allow attackers to compromise build integrity, access sensitive configuration data, or manipulate the automated build pipeline. The exploitation requires only authenticated access to the Jenkins system, making it particularly dangerous as it can be leveraged by insiders or attackers who have obtained valid credentials through various means including credential theft, social engineering, or other initial compromise techniques. Organizations implementing the Build Failure Analyzer plugin in their Jenkins environments were vulnerable to this attack until the release of version 1.5.1, which included proper input validation and output encoding mechanisms to prevent malicious script execution. The remediation strategy involves upgrading to the patched version of the plugin, which implements proper sanitization of user inputs and ensures that all rendered content undergoes appropriate encoding to prevent XSS exploitation. Security best practices recommend implementing a comprehensive input validation framework that treats all user-supplied data as potentially malicious, combined with output encoding mechanisms that ensure rendered content cannot be interpreted as executable scripts. The vulnerability demonstrates the importance of securing all components within CI/CD environments, as plugins often serve as attack surfaces that can be leveraged to compromise entire build infrastructure. Organizations should consider implementing additional security controls such as content security policies, regular security assessments of plugins, and monitoring for suspicious activities within Jenkins environments to detect potential exploitation attempts. This vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter: JavaScript, as attackers can leverage the XSS flaw to execute JavaScript within the victim's browser context, potentially leading to further compromise through session hijacking or data exfiltration activities. The incident highlights the critical need for maintaining up-to-date security patches in automated environments where plugins and extensions are frequently used to extend functionality, as even minor security flaws can have significant operational impacts on enterprise security postures.