CVE-2018-1999047 : Vulnerability Insights and Analysis

A vulnerability related to improper authorization has been identified in Jenkins versions 2.137 and earlier, as well as 2.121.2 and earlier. This vulnerability lies within the UpdateCenter.java file and enables attackers to cancel scheduled Jenkins restarts via the update center.

Understanding CVE-2018-1999047

This CVE involves an improper authorization vulnerability in Jenkins that allows attackers to disrupt scheduled restarts.

What is CVE-2018-1999047?

CVE-2018-1999047 is a security vulnerability found in Jenkins versions 2.137 and earlier, as well as 2.121.2 and earlier. It specifically affects the UpdateCenter.java file, enabling unauthorized users to cancel planned Jenkins restarts through the update center.

The Impact of CVE-2018-1999047

This vulnerability could lead to disruption of Jenkins services and potentially allow attackers to interfere with the normal operation of Jenkins instances.

Technical Details of CVE-2018-1999047

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The vulnerability in Jenkins versions 2.137 and earlier, as well as 2.121.2 and earlier, allows attackers to cancel scheduled Jenkins restarts via the update center due to improper authorization.

Affected Systems and Versions

Affected Versions: Jenkins 2.137 and earlier, 2.121.2 and earlier
Systems: Jenkins instances running the specified versions

Exploitation Mechanism

Attackers exploit the vulnerability by manipulating the authorization settings within the UpdateCenter.java file, enabling them to interfere with scheduled restarts.

Mitigation and Prevention

Protecting systems from CVE-2018-1999047 requires immediate action and long-term security measures.

Immediate Steps to Take

Update Jenkins to the latest patched version that addresses the vulnerability.
Monitor Jenkins instances for any unauthorized restart attempts.

Long-Term Security Practices

Implement proper access controls and authorization mechanisms within Jenkins.
Regularly audit and review Jenkins configurations for security gaps.

Patching and Updates

Apply security patches provided by Jenkins to fix the vulnerability.
Stay informed about security advisories and updates from Jenkins.