medallion 3.0.0

A TAXII 2.1 Server implementing required endpoints

cti-taxii-server

This is an OASIS TC Open Repository. See the Governance section for more information.

Trusted Automated Exchange of Intelligence Information (TAXII™) is an application layer protocol for the communication of cyber threat information in a simple and scalable manner.

Medallion is a minimal implementation of a TAXII 2.1 Server in Python.

WARNING: medallion was designed as a prototype and reference implementation of TAXII 2.1, and is not intended for production use.

medallion has been designed to be a simple front-end REST server providing access to the endpoints defined in that specification. It uses the python framework - Flask. medallion depends on back-end “plugins” which handle the persistence of the TAXII data and metadata. The TAXII specification is agnostic to what type of data a TAXII server stores, but this will usually be STIX 2 content.

Two back-end plugins are provided with medallion: the Memory back-end and the MongoDB back-end. The Memory back-end persists data “in memory”. It is initialized using a json file that contains TAXII data and metadata. It is possible to save the current state of the in memory store, but this back-end is really intended only for testing purposes. The MongoDB backend is somewhat more robust and makes use of a MongoDB server, installed independently. The MongoDB back-end can only be used if the pymongo python package is installed. An error message will result if it is used without that package.

For more information, see the documentation on ReadTheDocs.

Installation

The easiest way to install medallion is with pip

$ pip install medallion

Usage

As a script

Medallion provides a command-line interface to start the TAXII Server

usage: medallion [-h]
    [--host HOST]
    [--port PORT]
    [--debug-mode]
    [--log-level {DEBUG,INFO,WARN,ERROR,CRITICAL}]
    CONFIG_PATH

medallion v3.0.0

positional arguments:
  CONFIG_PATH           The location of the JSON configuration file to use.

optional arguments:
  -h, --help            show this help message and exit

  --host HOST           The host to listen on.

  --port PORT           The port of the web server.

  --debug-mode          If set, start application in debug mode.

  --log-level {DEBUG,INFO,WARN,ERROR,CRITICAL}
                        The logging output level for medallion.

To run medallion

$ python medallion/scripts/run.py <config-file>

Make sure medallion is using the same port that your TAXII client will be connecting on. You can specify which port medallion runs on using the –port option, for example

$ medallion --port 80 config_file.json

The <config_file> contains:

• configuration information for the backend plugin

• a simple user name/password dictionary

To use the Memory back-end plug, include the following in the <config-file>:

{
    "backend": {
        "module": "medallion.backends.memory_backend",
        "module_class": "MemoryBackend",
        "filename": "<path to json file with initial data>"
    }
}

To use the Mongo DB back-end plug, include the following in the <config-file>:

{
     "backend": {
        "module": "medallion.backends.mongodb_backend",
        "module_class": "MongoBackend",
        "uri": "<Mongo DB server url>  # e.g., 'mongodb://localhost:27017/'"
     }
}

Note: A Mongo DB should be available at some URL when using the Mongo DB back-end

A description of the Mongo DB structure expected by the mongo db backend code is described in the documentation.

As required by the TAXII specification, medallion supports HTTP Basic authorization. However, the user names and passwords are currently stored in the <config_file> in plain text.

Here is an example:

{
    "users": {
       "admin": "Password0",
       "user1": "Password1",
       "user2": "Password2"
    }
}

The authorization is enabled using the python package flask_httpauth. Authorization could be enhanced by changing the method “decorated” using @auth.get_password in medallion/__init__.py

Configs may also contain a “taxii” section as well, as shown below:

{
    "taxii": {
       "max_page_size": 100
    }
}

All TAXII servers require a config, though if any of the sections specified above are missing, they will be filled with default values.

We welcome contributions for other back-end plugins.

Docker

We also provide a Docker image to make it easier to run medallion

$ docker build . -t medallion

If operating behind a proxy, add the following option (replacing <proxy> with your proxy location and port): --build-arg https_proxy=<proxy>.

Then run the image

$ docker run --rm -p 5000:5000 -v <directory>:/var/taxii medallion

Replace <directory> with the full path to the directory containing your medallion configuration.

Governance

This GitHub public repository ( https://github.com/oasis-open/cti-taxii-server ) was created at the request of the OASIS Cyber Threat Intelligence (CTI) TC as an OASIS TC Open Repository to support development of open source resources related to Technical Committee work.

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Maintainers

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Current Maintainers of this TC Open Repository

• Chris Lenk; GitHub ID: https://github.com/clenk/; WWW: MITRE Corporation

• Rich Piazza; GitHub ID: https://github.com/rpiazza/; WWW: MITRE Corporation

• Emmanuelle Vargas-Gonzalez; GitHub ID: https://github.com/emmanvg/; WWW: MITRE Corporation

• Jason Keirstead; GitHub ID: https://github.com/JasonKeirstead; WWW: IBM

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