CVE-2017-1000354 : Exploit Details and Defense Strategies

Jenkins versions prior to 2.56 and 2.46.1 LTS have a security vulnerability allowing users to impersonate others through the login command.

Understanding CVE-2017-1000354

This CVE involves a vulnerability in Jenkins that enables unauthorized user impersonation.

What is CVE-2017-1000354?

Jenkins versions before 2.56 and 2.46.1 LTS have a flaw in the login command, permitting users to impersonate any other Jenkins user on the same instance.

The Impact of CVE-2017-1000354

The vulnerability allows any Jenkins user to impersonate another user by exploiting encrypted user names stored in a cache file after successful authentication.

Technical Details of CVE-2017-1000354

This section covers the technical aspects of the CVE.

Vulnerability Description

The vulnerability in Jenkins versions prior to 2.56 and 2.46.1 LTS allows unauthorized users to impersonate any Jenkins user through the login command.

Affected Systems and Versions

Jenkins versions before 2.56
Jenkins 2.46.1 LTS and earlier

Exploitation Mechanism

Users with permissions to create secrets in Jenkins and access encrypted values can exploit this vulnerability to impersonate any other Jenkins user on the same instance.

Mitigation and Prevention

Protect your systems from CVE-2017-1000354 with these steps.

Immediate Steps to Take

Upgrade Jenkins to version 2.56 or later.
Restrict permissions for creating secrets and accessing encrypted values.

Long-Term Security Practices

Regularly review and update Jenkins security settings.
Educate users on secure authentication practices.

Patching and Updates

Apply patches and updates provided by Jenkins to address this vulnerability.