CVE-2018-1000173 : Security Advisory and Response

This CVE involves a vulnerability in the Google Login Plugin in Jenkins, allowing unauthorized attackers to impersonate users.

Understanding CVE-2018-1000173

This CVE identifies a session fixation vulnerability in the Google Login Plugin in Jenkins, potentially enabling unauthorized access.

What is CVE-2018-1000173?

The Google Login Plugin 1.3 and older versions in Jenkins contain a vulnerability known as session fixation. This flaw resides in the GoogleOAuth2SecurityRealm.java file, enabling unauthorized attackers to impersonate other users if they control the pre-authentication session.

The Impact of CVE-2018-1000173

The vulnerability allows attackers to exploit pre-authentication sessions, posing a risk of unauthorized access and potential impersonation of users within the system.

Technical Details of CVE-2018-1000173

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in Jenkins' Google Login Plugin allows unauthorized attackers to impersonate users by manipulating pre-authentication sessions.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Google Login Plugin 1.3 and older

Exploitation Mechanism

Attackers with control over pre-authentication sessions can exploit the vulnerability to impersonate different users within the Jenkins system.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial to maintaining security.

Immediate Steps to Take

Update Jenkins to the latest version to patch the vulnerability.
Monitor and restrict access to pre-authentication sessions.

Long-Term Security Practices

Implement strong authentication mechanisms to prevent unauthorized access.
Regularly review and update security configurations to address potential vulnerabilities.

Patching and Updates

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