CVE-2018-1000862 : Vulnerability Insights and Analysis

Jenkins versions 2.153 and earlier, LTS versions 2.138.3 and earlier contain a vulnerability in DirectoryBrowserSupport.java, allowing attackers to browse the file system on build agents post-build. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2018-1000862

This CVE involves an information exposure vulnerability in Jenkins versions 2.153 and earlier, LTS versions 2.138.3 and earlier, specifically in DirectoryBrowserSupport.java.

What is CVE-2018-1000862?

This vulnerability enables attackers to access the file system on build agents even after the build duration has ended by manipulating control over build output through the workspace browser.

The Impact of CVE-2018-1000862

The vulnerability allows unauthorized individuals to view sensitive information on the build agents, potentially leading to data breaches and unauthorized access to critical files.

Technical Details of CVE-2018-1000862

This section provides a deeper insight into the vulnerability.

Vulnerability Description

An information exposure flaw in Jenkins versions 2.153 and earlier, LTS 2.138.3 and earlier, allows attackers to browse the file system on build agents post-build using the workspace browser.

Affected Systems and Versions

Jenkins versions 2.153 and earlier
LTS versions 2.138.3 and earlier

Exploitation Mechanism

Attackers exploit the vulnerability by gaining control over build output, enabling them to access the file system on build agents even after the build duration has ended.

Mitigation and Prevention

Protect your systems from CVE-2018-1000862 with these mitigation strategies.

Immediate Steps to Take

Update Jenkins to the latest version to patch the vulnerability.
Restrict access to build agents to authorized personnel only.
Monitor file system access for any suspicious activities.

Long-Term Security Practices

Regularly audit and review access controls on Jenkins and build agents.
Educate users on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Apply security patches promptly to ensure protection against known vulnerabilities.