Service scanning

At the moment the are no specialized service crawlers, however auditing web services is possible by first training the system via its proxy plugin.

Training

Initial

The best way to perform the initial training of the system is by running your service test-suite and having its HTTP requests go through the proxy plugin.

Proxy plugin setup

You can setup the proxy like so:

./bin/arachni http://target-url --scope-page-limit=0 --checks=*,-common_*,-backup*,-backdoors,-directory_listing --plugin=proxy --audit-jsons --audit-xmls

The default proxy URL will be: http://localhost:8282

The --scope-page-limit=0 option tells the system to not do any sort of crawl and only use what has been made visible via the proxy.
The set --checks option tells the system to load all but irrelevant checks for service scans -- common files and directories and the like don't really apply in this case.
The --audit-jsons --audit-xmls options restrict the scan to only JSON and XML inputs.

Test-suite setup

Test-suite configurations vary, however you can usually export the proxy setting as an environmental variable, prior to running your test-suite, like so:

export http_proxy=http://localhost:8282

If this global setting is ignored, you will need to explicitly configure your test-suite.

Exporting the input vectors

After running the test-suite, the system will have been trained with the input vectors of the web service.
Thus, it would be a good idea to export that data, in order to avoid having to run the training scenarios prior to each scan.

The data can be retrieved with:

http_proxy=http://localhost:8282 curl http://arachni.proxy/panel/vectors.yml -o vectors.yml

Starting the scan

In order for the scan to start you will need to shutdown the proxy:

http_proxy=http://localhost:8282 curl http://arachni.proxy/shutdown

Re-using input vector data

Data exported via the proxy plugin can be imported via the vector_feed plugin, like so:

./bin/arachni http://target-url --scope-page-limit=0 --checks=*,-common_*,-backup*,-backdoors,-directory_listing --plugin=vector_feed:yaml_file=vectors.yml

Thus, you only have to run your test-suite scenarios once, for the initial training, and then use the exported vector data for subsequent scans.

Debugging

You can debug the proxy manually via simple curl commands, like so:

http_proxy=http://localhost:8282 curl -H "Content-Type: application/json" -X POST -d '{ "input": "value" }' http://target-url/my-resource

Then, in Arachni's terminal you'll see something like:

[*] Proxy: Requesting http://target-url/my-resource
[~] Proxy:  *  0 forms
[~] Proxy:  *  0 links
[~] Proxy:  *  0 cookies
[~] Proxy:  *  1 JSON
[~] Proxy:  *  0 XML

If you require further information, you can enable the --output-debug option; acceptable verbosity values range from 1 to 3, 1 being the default.

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