Jenkins Panel Detection Scanner

Jenkins is a widely-used open-source automation server that facilitates continuous integration and delivery in software projects. It is commonly adopted by development teams and organizations to automate the building, testing, and deployment of software applications. By leveraging plugins and its vast ecosystem, Jenkins can be easily customized to fit various development and operational workflows. The system is accessible through a web-based interface, allowing users to manage jobs and view results remotely. Versatile and scalable, Jenkins supports numerous platforms and is suitable for projects of all sizes. Continuous updates and community support ensure that Jenkins remains a pivotal tool in modern DevOps practices.

This scanner detects the presence of Jenkins login panels, which could reveal the use of Jenkins on a given asset. Being able to identify Jenkins login pages is critical for security assessments as it provides information about potential points of access. A wider exposure of these panels can be a security concern if not properly restricted, as they could be targeted for unauthorized access attempts. Identifying the existence of such panels aids in developing strategies to secure Jenkins instances. The detection primarily focuses on the distinct markers found in the Jenkins login page. Maintaining security of Jenkins installations involves ensuring these login pages are not unnecessarily exposed to the public.

The vulnerability detection relies on checking the response from the URL path '/login' for certain expected words and status codes. It examines if the login page provides the phrase 'Sign in [Jenkins]' and returns a status code of 200, which indicates a successful request and visibility of the page. The presence of the login interface is a key indicator of an active Jenkins server. This approach highlights potentially exposed login endpoints which could be targeted by unauthorized users. Additionally, the check leverages known Jenkins favicon hashes to further confirm the presence of Jenkins. This technique efficiently identifies Jenkins installations based on specific URI paths and page content.

If left unaddressed, exposed Jenkins login panels could lead to unauthorized access attempts, risking the integrity of the software projects and data. Bad actors may exploit these open panels to launch brute force attacks or other malicious activities. Compromised Jenkins servers can lead to unauthorized changes in the project build processes, resulting in code modifications or the injection of malware. Security breaches in Jenkins could also allow attackers to access sensitive project configurations and credentials, potentially leading to broader network compromises. Ensuring the restriction of access to only trusted users and IPs is critical to maintaining a secure development environment.

REFERENCES

• https://www.jenkins.io/doc/book/security/