Syntribos, An Automated API Security Testing Tool

Syntribos
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=== Automated API Scanning  ===

Syntribos is an Automated API Security Testing Tool utilizing the Open CAFE Framework.

Given a simple configuration file and an example HTTP request, Syntribos can replace any API URL, URL parameter, HTTP header and request body field with a given set of strings. This is similar to Burp Proxy's Intruder sniper attack, but Syntribos iterates through each position automatically. Syntribos aims to automatically detect common security defects such as SQL injection, LDAP injection, buffer overflow, etc. In addition, Syntribos can be used to help identifying new security defects by fuzzing.

Syntribos has the capability to test any API, but is designed with OpenStack applications in mind.

Details

• Free software: Apache license
• Launchpad project
• Blueprints
• Bugs

Supported Operating Systems

Syntribos has been developed primarily in Linux and Mac environments, however it supports installation and execution on Windows. But it has not been tested yet.

Installation

Syntribos can be installed with pip from the git repository.

• Clone the repository and install it using pip

$ git clone https://github.com/openstack/syntribos.git
$ cd syntribos
$ pip install . --upgrade

• To enable autocomplete for Syntribos, run the command.

$ . scripts/syntribos-completion

• Create a directory named .opencafe in the user's home directory, or in the case of a python virtualenv, in the virtualenv root folder.

$ cafe-config init

• Install the http library that gives you the minimum plugins required to use Syntribos.

$ cafe-config plugins install http 

Configuration

Copy the data files from Syntribos data directory to .opencafe/data directory created during "cafe-config init". This directory contains the fuzz string files. Copy the example configuration file to .opencafe/configs directory created during "cafe-config init".

$ cp syntribos/data/* .opencafe/data/
$ cp syntribos/examples/configs/keystone.config  .opencafe/configs/.

Modify the configuration files to update your keystone URL, API endpoint and user credentials.

$ vi .opencafe/configs/keystone.config

Example configuration file:

[syntribos]
endpoint=<yourapiendpoint>

[user]
username=<yourusername>
password=<yourpassword>
user_id=<youruserid>


[auth]
endpoint=<yourkeystoneurl>

You can create a templates directory inside .opencafe directory to store the request templates for the resources being tested. The templates under the examples directory can give you a quick start.

$ mkdir .opencafe/templates
$ mkdir .opencafe/templates/keystone
$ cp syntribos/examples/templates/keystone/* .opencafe/templates/keystone

Running Syntribos

To execute a Syntribos test, run syntribos specifying the configuration file and template file(s) you want to use.

$ syntribos keystone.config .opencafe/templates/keystone/roles_get.txt

To run syntribos against all template files, just specify the template directory:

$ syntribos keystone.config .opencafe/templates/keystone/

Syntribos Logging

Syntribos takes advantage of the OpenCafe logging facility. Logs are found in .opencafe/logs/ Logs are then arranged in directories based on each Syntribos configuration file, and then by date and time. Each log filename has an easy to follow naming convention.

$ ls .opencafe/logs/keystone.config/2015-08-18_14_44_04.333088/
cafe.master.log
syntribos.tests.fuzz.integer_overflow.(domains_post.txt)_(INT_OVERFLOW_BODY)_(integer-overflow.txt)_str1_model1.log
syntribos.tests.fuzz.integer_overflow.(domains_post.txt)_(INT_OVERFLOW_BODY)_(integer-overflow.txt)_str1_model2.log
syntribos.tests.fuzz.integer_overflow.(domains_post.txt)_(INT_OVERFLOW_BODY)_(integer-overflow.txt)_str1_model3.log
syntribos.tests.fuzz.integer_overflow.(domains_post.txt)_(INT_OVERFLOW_BODY)_(integer-overflow.txt)_str2_model1.log
syntribos.tests.fuzz.integer_overflow.(domains_post.txt)_(INT_OVERFLOW_BODY)_(integer-overflow.txt)_str2_model2.log
syntribos.tests.fuzz.integer_overflow.(domains_post.txt)_(INT_OVERFLOW_BODY)_(integer-overflow.txt)_str2_model3.log

Each log file includes the request details:

------------
REQUEST SENT
------------
request method..: POST
request url.....: https://yourapiendpoint/v3/domains
request params..:
request headers.: {'Content-Length': '46', 'Accept-Encoding': 'gzip, deflate', 'Connection': 'keep-alive', 'Accept': 'application/json', 'User-Agent': 'python-requests/2.7.0 CPython/2.7.9 Darwin/11.4.2', 'Host': 'yourapiendpoint', 'X-Auth-Token': u'9b1ed3d1cc69491ab914dcb6ced00440', 'Content-type': 'application/json'}
request body....: {"domain": {"description": "Domain description","enabled": "-1","name": u'ce9871c4-a0a1-4fbe-88db-f0729b43172c'}}

2015-08-18 14:44:12,464: DEBUG: cafe.engine.http.client:

and the response:

-----------------
RESPONSE RECEIVED
-----------------
response status..: <Response [406]>
response time....: 1.32309699059
response headers.: {'content-length': '112', 'server': 'nginx', 'connection': 'keep-alive', 'date': 'Tue, 18 Aug 2015 19:44:11 GMT', 'content-type': 'application/json; charset=UTF-8'}
response body....: {"message": "The server could not comply with the request since it is either malformed or otherwise incorrect."}
-------------------------------------------------------------------------------
2015-08-18 14:44:12,465: INFO: root: ========================================================
2015-08-18 14:44:12,465: INFO: root: Test Case....: test_case
2015-08-18 14:44:12,465: INFO: root: Created At...: 2015-08-18 14:44:11.139070
2015-08-18 14:44:12,465: INFO: root: No Test description.
2015-08-18 14:44:12,465: INFO: root: ========================================================
2015-08-18 14:44:12,465: WARNING: cafe.engine.models.data_interfaces.ConfigParserDataSource: No section: 'fuzz'.  Using default value '200.0' instead
2015-08-18 14:44:12,465: DEBUG: root: Validate Length:
        Initial request length: 52
        Initial response length: 112
        Request length: 46
        Response length: 112
        Request difference: -6
        Response difference: 0
        Precent difference: 0.0
        Config percent: 200.0

Note the "Validate Length" section at the end. This is used to help determine whether the test passed or failed. If the Percent difference exceeds the Config percent the test has failed. The Config percent is set in syntribos/syntribos/tests/fuzz/config.py. The Percent difference is calculated in syntribos/syntribos/tests/fuzz/base_fuzz.py. Additional validations, such as looking for SQL strings or stack traces, can be added to individual tests.

The Logs also contain a summary of data related to the test results above:

2015-08-18 14:44:12,466: INFO: root: ========================================================
2015-08-18 14:44:12,466: INFO: root: Test Case......: test_case
2015-08-18 14:44:12,466: INFO: root: Result.........: Passed
2015-08-18 14:44:12,466: INFO: root: Start Time.....: 2015-08-18 14:44:12.464843
2015-08-18 14:44:12,466: INFO: root: Elapsed Time...: 0:00:00.001203
2015-08-18 14:44:12,466: INFO: root: ========================================================
2015-08-18 14:44:12,467: INFO: root: ========================================================
2015-08-18 14:44:12,467: INFO: root: Fixture........: syntribos.tests.fuzz.all_attacks.(agent_patch.txt)_(ALL_ATTACKS_BODY)_(all-attacks.txt)_str1_model1
2015-08-18 14:44:12,467: INFO: root: Result.........: Passed
2015-08-18 14:44:12,467: INFO: root: Start Time.....: 2015-08-18 14:44:11.139070
2015-08-18 14:44:12,467: INFO: root: Elapsed Time...: 0:00:01.328030
2015-08-18 14:44:12,468: INFO: root: Total Tests....: 1
2015-08-18 14:44:12,468: INFO: root: Total Passed...: 1
2015-08-18 14:44:12,468: INFO: root: Total Failed...: 0
2015-08-18 14:44:12,468: INFO: root: Total Errored..: 0
2015-08-18 14:44:12,468: INFO: root: ========================================================

Basic Syntribos Test Anatomy

Test Types

The tests included at release time include LDAP injection, SQL injection, integer overflow and the generic all_attacks.

In order to run a specific test, simply use the -t, --test-types option and provide syntribos with a keyword or keywords to match from the test files located in syntribos/tests/fuzz/.

For SQL injection tests, use:

$ syntribos keystone.config templates/keystone/domains_post.txt -t SQL

For SQL injection tests against the template body only, use:

$ syntribos keystone.config template/keystone/domains_post.txt -t SQL_INJECTION_BODY

For all tests against HTTP headers only, use:

$ syntribos keystone.config template/keystone/domains_post.txt -t HEADERS

Call External

Syntribos template files can be supplemented with variable data, or data retrieved from external sources. This is handled using 'extensions.'

Extensions are found in syntribos/syntribos/extensions/ .

One example packaged with Syntribos enables the tester to obtain an auth token from keystone/identity. The code is located in identity/client.py

To use this extension, you can add the following to your template file:

X-Auth-Token: CALL_EXTERNAL|syntribos.extensions.identity.client:get_token_v3:["user"]|

The "user" string indicates the data from the configuration file we added in opencafe/configs/keystone.config

Another example is found in random_data/client.py . This returns a UUID when random but unique data is needed. This can be used in place of usernames when fuzzing a create user call.

"username": "CALL_EXTERNAL|syntribos.extensions.random_data.client:get_uuid:[]|",

The extension function can return one value or be used as a generator if you want it to change for each test.

Action Field

While Syntribos is designed to test all fields in a request, it can also ignore specific fields through the use of Action Fields. If you want to fuzz against a static object ID, use the Action Field indicator as follows:

"ACTION_FIELD:id": "1a16f348-c8d5-42ec-a474-b1cdf78cf40f",

The ID provided will remain static for every test.

Executing Unittests

Navigate to the syntribos root directory

$ python -m unittest discover syntribos/ -p ut_*.py