Free and open-source vulnerability scanner
Mageni eases for you the vulnerability scanning, assessment, and management process. It is free and open-source.
Install NowAvailable for macOS, Windows, and Linux
Jenkins < 2.214, < 2.204.2 LTS Authentication Bypass Vulnerability (Linux)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Jenkins is prone to an inbound TCP Agent Protocol/3 authentication bypass vulnerability.
Insight
Insight
Jenkins includes support for the Inbound TCP Agent Protocol/3 for communication between master and agents. While this protocol has been deprecated in 2018 and was recently removed from Jenkins in 2.214, it could still easily be enabled in Jenkins LTS 2.204.1, 2.213, and older. This protocol incorrectly reuses encryption parameters which allow an unauthenticated remote attacker to determine the connection secret. This secret can then be used to connect attacker-controlled Jenkins agents to the Jenkins master.
Affected Software
Affected Software
Jenkins version 2.213 and prior and 2.204.1 LTS and prior.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 2.214, 2.204.2 LTS or later.