CVE-2019-1003004 : Exploit Details and Defense Strategies

A security vulnerability was identified in Jenkins versions 2.158 and earlier, as well as LTS versions 2.150.1 and earlier, allowing attackers to manipulate active HTTP sessions even after the corresponding user account has been deleted.

Understanding CVE-2019-1003004

This CVE involves an improper authorization vulnerability in Jenkins that can be exploited to extend the duration of active HTTP sessions indefinitely.

What is CVE-2019-1003004?

This CVE pertains to a flaw in Jenkins versions 2.158 and earlier, LTS 2.150.1 and earlier, specifically in the 'AuthenticationProcessingFilter2.java' file within the 'core/src/main/java/hudson/security/' directory. Attackers can abuse this vulnerability to maintain active HTTP sessions beyond the intended duration, even if the associated user account has been deleted.

The Impact of CVE-2019-1003004

The vulnerability enables threat actors to sustain active HTTP sessions indefinitely, posing a risk of unauthorized access and potential misuse of system resources.

Technical Details of CVE-2019-1003004

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability allows attackers to prolong the duration of active HTTP sessions, even if the corresponding user account has been deleted during that period.

Affected Systems and Versions

Jenkins versions 2.158 and earlier
LTS versions 2.150.1 and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability in the 'AuthenticationProcessingFilter2.java' file to manipulate active HTTP sessions beyond their intended duration.

Mitigation and Prevention

Protecting systems from CVE-2019-1003004 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Jenkins to the latest patched version
Monitor active HTTP sessions for unusual behavior
Implement multi-factor authentication

Long-Term Security Practices

Regularly audit and review user accounts and permissions
Conduct security training for staff to recognize and report suspicious activities

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security