CVE-2019-1003001 Explained : Impact and Mitigation

A sandbox bypass vulnerability in the Pipeline: Groovy Plugin version 2.61 and earlier allows attackers with specific permissions to execute arbitrary code on the Jenkins master JVM.

Understanding CVE-2019-1003001

This CVE involves a security flaw in the Pipeline: Groovy Plugin that could lead to unauthorized code execution.

What is CVE-2019-1003001?

The vulnerability in the Pipeline: Groovy Plugin version 2.61 and earlier enables attackers with Overall/Read permission to inject and execute malicious code through a pipeline script, potentially compromising the Jenkins master JVM.

The Impact of CVE-2019-1003001

Exploitation of this vulnerability can result in the compromise of the Jenkins master JVM, allowing attackers to execute arbitrary code, posing a significant security risk to the affected systems.

Technical Details of CVE-2019-1003001

This section provides detailed technical insights into the CVE.

Vulnerability Description

The vulnerability exists in the CpsFlowDefinition.java and CpsGroovyShellFactory.java files within the Pipeline: Groovy Plugin source code, enabling attackers to bypass the sandbox and execute arbitrary code.

Affected Systems and Versions

Product: Pipeline: Groovy Plugin
Vendor: Jenkins project
Versions affected: 2.61 and earlier

Exploitation Mechanism

Attackers with Overall/Read permission can exploit this vulnerability by providing a pipeline script to an HTTP endpoint, leading to the execution of arbitrary code on the Jenkins master JVM.

Mitigation and Prevention

Protecting systems from CVE-2019-1003001 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Pipeline: Groovy Plugin to a non-vulnerable version.
Restrict access permissions to prevent unauthorized users from executing pipeline scripts.
Monitor and audit HTTP endpoints for suspicious activities.

Long-Term Security Practices

Regularly review and update Jenkins plugins to ensure the latest security patches are applied.
Implement least privilege principles to limit user permissions and access.
Conduct security training for users to recognize and report suspicious activities.

Patching and Updates

Jenkins project has released security advisories and patches to address this vulnerability. Ensure timely application of these patches to secure the system.