CVE-2019-10372 : Vulnerability Insights and Analysis

Jenkins Gitlab Authentication Plugin 1.4 and earlier versions contain an open redirect vulnerability in GitLabSecurityRealm.java, allowing malicious users to redirect logged-in individuals to external websites.

Understanding CVE-2019-10372

This CVE involves a security flaw in the Jenkins Gitlab Authentication Plugin that could be exploited by attackers to redirect users to unauthorized websites.

What is CVE-2019-10372?

An open redirect vulnerability in Jenkins Gitlab Authentication Plugin 1.4 and earlier versions enables attackers to redirect users to URLs outside Jenkins after successful login.

The Impact of CVE-2019-10372

Malicious users can redirect logged-in individuals to websites not hosted by Jenkins, potentially leading to phishing attacks or the download of malicious content.

Technical Details of CVE-2019-10372

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The open redirect vulnerability in GitLabSecurityRealm.java allows attackers to redirect users to external URLs post-login.

Affected Systems and Versions

Product: Jenkins Gitlab Authentication Plugin
Vendor: Jenkins project
Versions Affected: 1.4 and earlier

Exploitation Mechanism

The flaw in GitLabSecurityRealm.java can be exploited by malicious users to craft URLs that redirect users to unauthorized websites.

Mitigation and Prevention

To address CVE-2019-10372, consider the following steps:

Immediate Steps to Take

Update Jenkins Gitlab Authentication Plugin to the latest version.
Implement URL validation mechanisms to prevent open redirects.

Long-Term Security Practices

Regularly monitor and update Jenkins plugins to patch security vulnerabilities.
Educate users on phishing awareness and safe browsing practices.

Patching and Updates

Apply security patches promptly to mitigate the risk of open redirect vulnerabilities.