CVE-2018-1000188 : Security Advisory and Response

Jenkins CAS Plugin versions 1.4.1 and earlier contain a server-side request forgery vulnerability that can be exploited by attackers with Overall/Read access to Jenkins.

Understanding CVE-2018-1000188

This CVE involves a security vulnerability in the CasSecurityRealm.java file of Jenkins CAS Plugin versions 1.4.1 and below, allowing unauthorized users to trigger GET requests to specific URLs.

What is CVE-2018-1000188?

The vulnerability in Jenkins CAS Plugin versions 1.4.1 and earlier enables attackers with Overall/Read access to Jenkins to manipulate the system into sending unauthorized GET requests to designated URLs.

The Impact of CVE-2018-1000188

Exploitation of this vulnerability could lead to unauthorized access to sensitive information, potential data breaches, and manipulation of Jenkins configurations by malicious actors.

Technical Details of CVE-2018-1000188

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The CasSecurityRealm.java file in Jenkins CAS Plugin versions 1.4.1 and earlier is susceptible to server-side request forgery, allowing attackers with Overall/Read access to Jenkins to initiate unauthorized GET requests to specific URLs.

Affected Systems and Versions

Product: Jenkins CAS Plugin
Vendor: Jenkins
Versions affected: 1.4.1 and earlier

Exploitation Mechanism

Attackers exploit the vulnerability by leveraging Overall/Read access to Jenkins, triggering GET requests to specific URLs, potentially compromising the system's security.

Mitigation and Prevention

Protecting systems from CVE-2018-1000188 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Jenkins CAS Plugin to the latest version to patch the vulnerability.
Restrict Overall/Read access to authorized users only.
Monitor and log Jenkins requests for suspicious activities.

Long-Term Security Practices

Regularly review and update Jenkins and its plugins to ensure the latest security patches are applied.
Implement least privilege access controls to limit user permissions.
Conduct security training for Jenkins administrators and users to enhance awareness of potential threats.

Patching and Updates

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