CVE-2019-10338 : Security Advisory and Response

The Jenkins JX Resources Plugin, versions 1.0.36 and earlier, contained a cross-site request forgery (CSRF) vulnerability that could allow attackers to manipulate Jenkins into connecting to a Kubernetes server of their choice, potentially leading to unauthorized credential disclosure.

Understanding CVE-2019-10338

This CVE involves a security vulnerability in the Jenkins JX Resources Plugin that could be exploited by attackers to compromise the integrity of Jenkins instances.

What is CVE-2019-10338?

CVE-2019-10338 is a CSRF vulnerability in the Jenkins JX Resources Plugin, versions 1.0.36 and earlier, that enables attackers to force Jenkins to connect to a malicious Kubernetes server, potentially resulting in the exposure of sensitive credentials.

The Impact of CVE-2019-10338

The vulnerability could lead to unauthorized access to Jenkins resources and the potential leakage of sensitive information, posing a significant security risk to affected systems.

Technical Details of CVE-2019-10338

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability in the Jenkins JX Resources Plugin, specifically in GlobalPluginConfiguration#doValidateClient, allows attackers to manipulate Jenkins into connecting to a Kubernetes server under their control, potentially leading to credential exposure.

Affected Systems and Versions

Product: Jenkins JX Resources Plugin
Vendor: Jenkins project
Versions Affected: 1.0.36 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious requests that trick Jenkins into connecting to a Kubernetes server controlled by the attacker, enabling the unauthorized disclosure of credentials.

Mitigation and Prevention

To address CVE-2019-10338 and enhance system security, the following steps are recommended:

Immediate Steps to Take

Update the Jenkins JX Resources Plugin to a non-vulnerable version.
Implement network controls to restrict access to Jenkins and Kubernetes servers.
Monitor Jenkins logs for any suspicious activity indicating potential exploitation.

Long-Term Security Practices

Regularly review and update Jenkins plugins to ensure they are free from known vulnerabilities.
Conduct security training for personnel to raise awareness of CSRF attacks and other common security threats.

Patching and Updates

Apply patches and updates provided by Jenkins project to address the CSRF vulnerability in the JX Resources Plugin.