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OWASP Threat Dragon

OWASP Threat Dragon is a free, open-source, cross-platform threat modeling application. It is used to draw threat modeling diagrams and to list threats for elements in the diagram. Mike Goodwin created Threat Dragon as an open source community project that provides an intuitive and accessible way to model threats.

Threat Dragon is designed to be accessible for various types of teams, with an emphasis on flexibility and simplicity. It is an OWASP Lab Project and follows the values and principles of the threat modeling manifesto.

Try Threat Dragon

You can access the the latest version of Threat Dragon on our website and look through the documentation pages.

Also well worth watching the video provided by the OWASP Spotlight series.

The github release area contains Threat Dragon from version 1.3 to the latest versions 2.x. Previous releases are from Mike Goodwin's original repository.

About Threat Dragon

There is a good overview of threat modeling and risk assessment from OWASP, and this expands on what the Threat Dragon project aims for:

  • ease of use and accessible
  • designing a data flow diagram
  • suggesting threats
  • entering mitigations and counter measures

Mike Goodwin is the founder and creator of this project, and this repository has been migrated from Mike Goodwin's original which has the issues and pull requests from October 2015 up to June 2020.

Threat Dragon is primarily a web application, with threat model files stored in GitHub. Over time other storage methods will become available.

There are desktop versions of Threat Dragon which store the threat model files on the local filesystem rather than in a repository. You can download installers for Windows, MacOS and Linux.

End user help is available for both the latest version 2.x and the previous version 1.x.

Version 1.x maintenance mode

Threat Dragon was originally written using AngularJS version 1.x, and this version of Angular has reached end of life. This means that versions 1.x of Threat Dragon are no longer actively maintained and versions 2.x have been re-written to use Vue.js.

For more information on building/running version 1.x, please see the legacy-v1.x branch.

Building version 2.x

Install git and node.js which includes the node package manager npm

Clone the repository using: git clone https://github.com/owasp/threat-dragon.git

This downloads the code into a threat-dragon directory and the application code is in two sub-folders, one for the back-end application (td.server) and one for the front-end (td.vue).

Install from the top directory of the project using : npm install

Environment variables for web application

The web application variant of Threat Dragon requires some environment variables; follow the documentation on how to set these variables.

The Threat Dragon web application uses GitHub to store threat models, so you need to go to your GitHub account and register it as a GitHub application. There is a step by step guide on how to do this. Github Enterprise is also supported.

If running the web application locally then the front-end to server communication will probably need to be HTTP rather than HTTPS. Specify this using environment variable SERVER_API_PROTOCOL=http in the dotenv file or the command line.

Run the application

When running on Windows, and during development, the front-end and back-end can be started separately in "watch" mode using commands : npm run dev:server and npm run dev:vue. Alternatively, if running on Linux or MacOS, start both the back-end server and the front-end application from the top directory using : npm start.

With both front and back end running, access with a browser at http://localhost:8080/

Stop the application

If using npm start, stop both the back-end server and the front-end application from the top directory with command npm stop. Otherwise break out of both the server and vue front-end.

Docker (local build)

To run Threat Dragon in a docker container, first configure your environment using dotenv and run from the top directory of the project:

  • docker build -t owasp-threat-dragon:dev .
  • docker run -it --rm -p 8080:3000 -v $(pwd)/.env:/app/.env owasp-threat-dragon:dev
  • or if using Windows:
  • docker run -it --rm -p 8080:3000 -v %CD%/.env:/app/.env owasp-threat-dragon:dev

Using http port 8080 and accessing Threat Dragon on http://localhost:8080/.

Docker (from dockerhub)

Threat Dragon maintains docker images within the OWASP organisation area on Dockerhub. Each release is tagged as v{major}.{minor}.{patch}, eg v1.6.0:

  • docker pull owasp/threat-dragon:v2.0.0

The latest tag (which is the default) may well be a development version so use the stable tag, which will always be the latest official release:

  • docker pull threatdragon/owasp-threat-dragon:stable
  • For MacOS and Linux:
  • docker run -it --rm -p 8080:3000 -v $(pwd)/.env:/app/.env threatdragon/owasp-threat-dragon:v2.0.0
  • For Windows:
  • docker run -it --rm -p 8080:3000 -v %CD%/.env:/app/.env threatdragon/owasp-threat-dragon:v2.0.0

Assuming that you are using http port 8080 and accessing Threat Dragon on http://localhost:8080/.

Contributing

Pull requests, feature requests, bug reports and feedback of any kind are very welcome, please refer to the page for contributors.

There are some developer notes to help get started with this project. We are trying to keep the test coverage relatively high so include tests in your pull requests.

The easiest way to get in contact with the Threat Dragon community is via the OWASP Slack #project-threat-dragon project channel (you may need to subscribe first).

Vulnerability disclosure

If you find a vulnerability in this project please let us know ASAP and we will fix it as a priority. For secure disclosure, please see the security policy.

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