CVE-2018-1000196 Explained : Impact and Mitigation

A vulnerability in versions 1.4.2 and older of the Jenkins Gitlab Hook Plugin exposes sensitive information, allowing attackers with local access to the Jenkins master file system or control over a Jenkins administrator's web browser to retrieve the Gitlab token.

Understanding CVE-2018-1000196

This CVE involves a security issue in the Jenkins Gitlab Hook Plugin that can lead to unauthorized access to sensitive data.

What is CVE-2018-1000196?

The vulnerability in Jenkins Gitlab Hook Plugin versions 1.4.2 and earlier enables attackers to extract the configured Gitlab token by exploiting specific files within the plugin.

The Impact of CVE-2018-1000196

The vulnerability poses a risk of exposing sensitive information to malicious actors who can compromise the Jenkins environment.

Technical Details of CVE-2018-1000196

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The flaw in the Jenkins Gitlab Hook Plugin versions 1.4.2 and below allows attackers to access the Gitlab token, potentially leading to unauthorized actions.

Affected Systems and Versions

Jenkins Gitlab Hook Plugin versions 1.4.2 and older

Exploitation Mechanism

Attackers with local access to the Jenkins master file system or control over a Jenkins administrator's web browser can exploit the vulnerability to retrieve the Gitlab token.

Mitigation and Prevention

Protecting systems from CVE-2018-1000196 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Jenkins Gitlab Hook Plugin to the latest secure version.
Monitor and restrict access to the Jenkins master file system.
Be cautious of browser extensions with elevated privileges.

Long-Term Security Practices

Regularly audit and review Jenkins plugin security.
Implement least privilege access controls.
Educate administrators on secure browsing practices.

Patching and Updates

Apply security patches promptly to Jenkins and associated plugins to address known vulnerabilities.