CVE-2018-1000194 : Exploit Details and Defense Strategies

Jenkins versions 2.120 and older, as well as LTS versions 2.107.2 and older, have a vulnerability that allows malicious agents to access and manipulate files on the Jenkins master.

Understanding CVE-2018-1000194

This CVE involves a path traversal vulnerability in Jenkins that can be exploited by malicious agents to read and write arbitrary files on the Jenkins master.

What is CVE-2018-1000194?

This vulnerability exists in the FilePath.java and SoloFilePathFilter.java files in Jenkins versions 2.120 and older, as well as LTS versions 2.107.2 and older. It enables malicious agents to bypass the agent-to-master security subsystem and gain unauthorized access to files on the Jenkins master.

The Impact of CVE-2018-1000194

The vulnerability poses a significant security risk as it allows unauthorized access and manipulation of files on the Jenkins master, potentially leading to data breaches and system compromise.

Technical Details of CVE-2018-1000194

Vulnerability Description

A path traversal vulnerability in Jenkins versions 2.120 and older, LTS 2.107.2 and older in FilePath.java and SoloFilePathFilter.java allows malicious agents to read and write arbitrary files on the Jenkins master.

Affected Systems and Versions

Jenkins versions 2.120 and older
LTS versions 2.107.2 and older

Exploitation Mechanism

The vulnerability enables malicious agents to bypass the agent-to-master security subsystem and gain unauthorized access to files on the Jenkins master.

Mitigation and Prevention

Immediate Steps to Take

Update Jenkins to the latest version to patch the vulnerability
Monitor and restrict access to the Jenkins master
Implement strong authentication mechanisms

Long-Term Security Practices

Regularly update and patch Jenkins and its dependencies
Conduct security audits and vulnerability assessments

Patching and Updates

Apply security patches and updates promptly to ensure the protection of Jenkins systems