OWASP Attack Surface Detector Project

Introduction During web application penetration testing, it is important to enumerate your application's attack surface. While Dynamic Application Security Testing (DAST) tools (such as OWASP ZAP and PortSwigger Burp Suite) are good at spidering to identify application attack surfaces, they will often fail to identify unlinked endpoints and optional parameters. These endpoints and parameters not found often go untested, which can leave your application open to an attacker. What is the Attack Surface Detector? The Attack Surface Detector tool figures out the endpoints of a web application, the parameters these endpoints accept, and the data type of those parameters. This includes the unlinked endpoints a spider won't find in client-side code, or optional parameters totally unused in client-side code. It also has the capability to calculate the changes in attack surface between two versions of an application. The Attack Surface Detector is available as a plugin to both ZAP and Burp Suite, and a Command Line Interface (CLI) tool is also available. The CLI tool exports the attack surface as a JSON output, which can then be used by the ZAP and Burp Suite plugin. This is helpful for cases where the source code is not provided to the penetration tester directly. The CLI tool can also be used for other custom integration where you want to discover an application attack surface or changes in the attack surface. For a quick overview of the Attack Surface Detection tool, see this YouTube video: Below is a screenshot of the Burp Suite Attack Surface Detector plugin where you can see a list of endpoints, endpoint details, and their corresponding requests: How it Works The Attack Surface Detector performs static code analyses to identify web app endpoints by parsing routes and identifying parameters (with supported languages and frameworks). This data is made available in ZAP and Burp Suite to help improve testing coverage. Supported Languages and Frameworks Java: JSPs, Servlets, Struts, Spring MVC C#: ASP.NET MVC, Web Forms Ruby: Rails Python: Django Getting Involved Contributions to the Attack Surface Detector project are encouraged and welcome. Additions of new features and enhancements can be provided through GitHub. We are eager to get user feedback, so please reach out to us or fill out this ASD survey. Licensing The Attack Surface Detector plugin is free to use. It is licensed under the link Mozilla Public License 2.0. Acknowledgements The Attack Surface Detection project is led by Secure Decisions and was developed in collaboration with Denim Group under a research grant sponsored by Department of Homeland Security (DHS) Science and Technology Directorate, Cyber Security Division (DHS S&T/CSD), BAA via contract number HHSP233201600058C.

Project Resources ASD Plugin for OWASP ZAP: Download ZAP Plugin Documentation Submit Feedback GitHub Source Code ASD Plugin for PortSwigger Burp: Download Burp Suite Plugin Documentation Submit Feedback GitHub Source Code ASD Command-Line Tool: Download ASD CLI Documentation Submit Feedback GitHub Source Code Contact Us Project Leader: Ken Prole Email: ken.prole@securedecisions.com Email us @SecDec Related Projects OWASP Zed Attack Proxy Project OWASP Code Pulse Project Classifications