CVE-2017-1000356 Explained : Impact and Mitigation

Jenkins versions prior to 2.56 and 2.46.1 LTS have a vulnerability in the authentication realm of the Jenkins user database, allowing unauthorized account creation and potential deletion of the default admin user.

Understanding CVE-2017-1000356

This CVE highlights a security flaw in Jenkins versions that could lead to unauthorized account creation and potential deletion of the default admin user.

What is CVE-2017-1000356?

This vulnerability in Jenkins versions prior to 2.56 and 2.46.1 LTS allows attackers to create new accounts or delete existing admin accounts, posing various risks.

The Impact of CVE-2017-1000356

The vulnerability enables unauthorized users to create accounts or delete admin accounts, potentially causing severe consequences within the Jenkins environment.

Technical Details of CVE-2017-1000356

Jenkins versions prior to 2.56 and 2.46.1 LTS are susceptible to an authentication realm issue in the user database.

Vulnerability Description

The vulnerability allows attackers to create new accounts if the signup feature is enabled or delete existing admin accounts, including the default admin user.

Affected Systems and Versions

Jenkins versions prior to 2.56
Jenkins 2.46.1 LTS and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the authentication realm weakness in the Jenkins user database to create or delete user accounts.

Mitigation and Prevention

Steps to address and prevent the CVE-2017-1000356 vulnerability.

Immediate Steps to Take

Disable the signup feature if not required
Monitor user accounts for unauthorized activity
Implement strong password policies

Long-Term Security Practices

Regularly update Jenkins to the latest version
Conduct security audits and penetration testing

Patching and Updates

Apply patches provided by Jenkins to fix the authentication realm vulnerability