Class: Brakeman::CheckRansack

Inherits:
BaseCheck
  • Object
show all
Defined in:
lib/brakeman/checks/check_ransack.rb

Instance Method Summary collapse

Instance Method Details

#check_ransack_calls ⇒ Object 



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# File 'lib/brakeman/checks/check_ransack.rb', line 13

def check_ransack_calls
  tracker.find_call(method: :ransack, nested: true).each do |result|
    next unless original? result

    call = result[:call]
    arg = call.first_arg

    # If an allow list is defined anywhere in the
    # class or super classes, consider it safe
    class_name = result[:chain].first

    next if ransackable_allow_list?(class_name)

    if input = has_immediate_user_input?(arg)
      confidence = if tracker.find_class(class_name).nil?
                     confidence = :low
                   elsif result[:location][:file].relative.include? 'admin'
                     confidence = :medium
                   else
                     confidence = :high
                   end

      message = msg('Unrestricted search using ', msg_code('ransack'), ' library called with ', msg_input(input), '. Limit search by defining ', msg_code('ransackable_attributes'), ' and ', msg_code('ransackable_associations'), ' methods in class or upgrade Ransack to version 4.0.0 or newer')

      warn result: result,
        warning_type: 'Missing Authorization',
        warning_code: :ransack_search,
        message: message,
        user_input: input,
        confidence: confidence,
        cwe_id: [862],
        link: 'https://positive.security/blog/ransack-data-exfiltration'
    end
  end
end

#ransackable_allow_list?(class_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/brakeman/checks/check_ransack.rb', line 49

def ransackable_allow_list? class_name
  tracker.find_method(:ransackable_attributes, class_name, :class) and
    tracker.find_method(:ransackable_associations, class_name, :class)
end

#run_check ⇒ Object 



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# File 'lib/brakeman/checks/check_ransack.rb', line 8

def run_check
  return unless version_between? "0.0.0", "3.99", tracker.config.gem_version(:ransack)
  check_ransack_calls
end