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API Fuzzer

API_Fuzzer gem accepts a API request as input and returns vulnerabilities possible in the API. Following are the main check involved in API_Fuzzer gem

  • Cross-site scripting vulnerability
  • SQL injection
  • Blind SQL injection
  • XML External entity vulnerability
  • IDOR (in specific cases)
  • API Rate Limiting
  • Open redirect vulnerabilities
  • Information Disclosure flaws
  • Info leakage through headers
  • Cross-site request forgery vulnerability

Installation

Add this line to your application's Gemfile:

gem 'API_Fuzzer'

And then execute:

$ bundle

Or install it yourself as:

$ gem install API_Fuzzer

Usage

Run bin/console

Lets say you have following endpoint

POST /api/v2/credit_cards/123

Host: test.host.com
User-Agent: Mozilla Firefox
Auth: Basic Adnjefnef443nr4jh4h
{ credit_card: '4242424242424242', expiry: '07/17', cvv: '123', name: 'First name' }

API_Fuzzer module comes with static method scan and accepts above request

require 'API_Fuzzer'

options = {
  url: 'http://test.host.com/api/v2/credit_cards/123',
  params: {
    credit_card: '4242424242424242',
    expiry: '07/17',
    cvv: '123',
    name: 'First name'
  },
  method: ['POST'],
  headers: {
    'Host' => 'test.host.com',
    'User-Agent' => 'Mozilla Firefox',
    'Auth' => 'Basic Adnjefnef443nr4jh4h'
  }
}
vulnerabilities = API_Fuzzer.scan(options)

vulnerabilites is an array of vulnerability, each distinguished with impact type, title and description.

Above Ruby code can be painful for writing ruby script for each request. Fuzzapi is a rails application which integrates and bundles API_Fuzzer and brings UI changes to easily scan API endpoints.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

If you have any issue, we would be happy to help. You can create an issue in repository or contact any of following twitter handles @abhijeth, @srini0x00, @lalithr95

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/lalithr95/API_Fuzzer. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Copyrights Fuzzdb for fuzzing payloads

About

API Fuzzer which allows to fuzz request attributes using common pentesting techniques and lists vulnerabilities

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