Module: Aikido::Zen::Sinks::Patron::Extensions

Defined in:
lib/aikido/zen/sinks/patron.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.wrap_response(request, response) ⇒ Object 



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# File 'lib/aikido/zen/sinks/patron.rb', line 15

def self.wrap_response(request, response)
  # In this case, automatic redirection happened inside libcurl.
  if response.url != request.url && !response.url.to_s.empty?
    Aikido::Zen::Scanners::SSRFScanner::Response.new(
      status: 302, # We can't know what the actual status was, but we just need a 3XX
      headers: response.headers.merge("Location" => response.url)
    )
  else
    Aikido::Zen::Scanners::SSRFScanner::Response.new(
      status: response.status,
      headers: response.headers
    )
  end
end

Instance Method Details

#handle_request(request) ⇒ Object 



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# File 'lib/aikido/zen/sinks/patron.rb', line 30

def handle_request(request)
  wrapped_request = Aikido::Zen::Scanners::SSRFScanner::Request.new(
    verb: request.action,
    uri: URI(request.url),
    headers: request.headers
  )

  # Store the request information so the DNS sinks can pick it up.
  if (context = Aikido::Zen.current_context)
    prev_request = context["ssrf.request"]
    context["ssrf.request"] = wrapped_request
  end

  SINK.scan(
    connection: Aikido::Zen::OutboundConnection.from_uri(URI(request.url)),
    request: wrapped_request,
    operation: "request"
  )

  response = super

  Aikido::Zen::Scanners::SSRFScanner.track_redirects(
    request: wrapped_request,
    response: Extensions.wrap_response(request, response)
  )

  # When libcurl has follow_location set, it will handle redirections
  # internally, and expose the response.url as the URI that was last
  # requested in the redirect chain.
  #
  # In this case, we can't actually stop the request from happening, but
  # we can scan again (now that we know another request happened), to
  # stop the response from being exposed to the user. This downgrades
  # the SSRF into a blind SSRF, which is better than doing nothing.
  if request.url != response.url && !response.url.to_s.empty?
    last_effective_request = Aikido::Zen::Scanners::SSRFScanner::Request.new(
      verb: request.action,
      uri: URI(response.url),
      headers: request.headers
    )
    context["ssrf.request"] = last_effective_request if context

    SINK.scan(
      connection: Aikido::Zen::OutboundConnection.from_uri(URI(response.url)),
      request: last_effective_request,
      operation: "request"
    )
  end

  response
ensure
  context["ssrf.request"] = prev_request if context
end