CVE-2018-1000865 : What You Need to Know

A security vulnerability in versions 1.47 and earlier of the Script Security Plugin allows attackers to run unauthorized code on the Jenkins master JVM.

Understanding CVE-2018-1000865

This CVE involves a sandbox bypass vulnerability in the Script Security Plugin.

What is CVE-2018-1000865?

Attackers with Job/Configure permission can execute arbitrary code on the Jenkins master JVM if plugins using the Groovy sandbox are installed.

The Impact of CVE-2018-1000865

Unauthorized code execution on the Jenkins master JVM.

Technical Details of CVE-2018-1000865

The vulnerability details and affected systems.

Vulnerability Description

The vulnerability is in the SandboxTransformer.java file in groovy-sandbox/src/main/java/org/kohsuke/groovy/sandbox/.

Affected Systems and Versions

Versions 1.47 and earlier of the Script Security Plugin.

Exploitation Mechanism

Attackers with Job/Configure permission can exploit the vulnerability to run unauthorized code on the Jenkins master JVM.

Mitigation and Prevention

Steps to mitigate and prevent the vulnerability.

Immediate Steps to Take

Update the Script Security Plugin to a non-vulnerable version.
Restrict Job/Configure permissions to trusted users.

Long-Term Security Practices

Regularly monitor and update Jenkins plugins.
Implement the principle of least privilege for user permissions.

Patching and Updates

Apply patches provided by Jenkins and plugin vendors.