CVE-2019-10331 in ElectricFlow Plugin
Summary
by MITRE
A cross-site request forgery vulnerability in Jenkins ElectricFlow Plugin 1.1.5 and earlier in Configuration#doTestConnection allowed attackers to connect to an attacker-specified URL using attacker-specified credentials.
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Analysis
by VulDB Data Team • 10/03/2023
The vulnerability identified as CVE-2019-10331 represents a critical cross-site request forgery weakness within the Jenkins ElectricFlow Plugin version 1.1.5 and earlier. This flaw exists in the Configuration#doTestConnection method which handles connection testing functionality for ElectricFlow integrations. The vulnerability allows authenticated attackers with sufficient privileges to manipulate the plugin's connection testing mechanism to establish connections to arbitrary URLs using credentials specified by the attacker. This represents a significant security risk as it enables unauthorized access to systems that the Jenkins instance can reach, potentially compromising network infrastructure and sensitive data repositories. The flaw is particularly dangerous because it operates within a legitimate administrative function, making it more likely to be overlooked during security assessments.
The technical implementation of this vulnerability stems from insufficient validation and authorization checks within the doTestConnection endpoint. When administrators use the plugin to test connections to ElectricFlow servers, the application accepts user-supplied parameters without proper sanitization or verification of the target URL and credentials. This allows an attacker to craft malicious requests that could force the Jenkins server to make connections to internal systems or external malicious endpoints. The vulnerability is classified under CWE-352, which specifically addresses Cross-Site Request Forgery, and falls into the broader category of insecure direct object references that enable unauthorized actions within the application's context. The flaw demonstrates poor input validation practices where user-controllable data directly influences the application's behavior without proper access controls.
Operationally, this vulnerability creates substantial risk for Jenkins environments that utilize the ElectricFlow plugin, particularly in enterprise settings where Jenkins serves as a central automation hub. Attackers could leverage this weakness to probe internal network services, potentially discovering and exploiting additional vulnerabilities in connected systems. The impact extends beyond simple data exfiltration as the attacker could use this capability to establish persistent access points, conduct reconnaissance against internal infrastructure, or even facilitate lateral movement within the network. In a typical attack scenario, an authenticated user would need to be tricked into clicking a malicious link or visiting a compromised webpage that automatically submits a forged request to the vulnerable endpoint. This could result in unauthorized access to ElectricFlow servers, internal databases, or other systems that the Jenkins server can reach through its network configuration.
Mitigation strategies for CVE-2019-10331 should prioritize immediate plugin updates to versions that address the CSRF vulnerability. Organizations must also implement additional protective measures including input validation for all user-supplied parameters, mandatory authentication for connection testing functions, and network segmentation to limit the blast radius of potential exploitation. The implementation of proper CSRF tokens within the plugin's endpoints would prevent unauthorized request execution, while network monitoring solutions should be deployed to detect anomalous connection patterns originating from the Jenkins server. Security teams should also conduct comprehensive audits of all installed Jenkins plugins to identify similar vulnerabilities and establish automated patch management processes. According to ATT&CK framework, this vulnerability aligns with T1566 (Phishing) and T1071.004 (Application Layer Protocol: DNS) as attackers may use this weakness to establish command and control channels or conduct reconnaissance activities. Regular security assessments and privilege reviews should be implemented to minimize the risk of exploitation, particularly focusing on administrative accounts that have access to plugin configuration functions.