Oracle TNS Listener Checker

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##class MetasploitModule < Msf::Auxiliary  include Msf::Auxiliary::Report  include Msf::Auxiliary::Scanner  include Msf::Exploit::Remote::TNS  def initialize(info = {})    super(update_info(info,      'Name'           => 'Oracle TNS Listener Checker',      'Description'    => %q{        This module checks the server for vulnerabilities like TNS Poison.        Module sends a server a packet with command to register new TNS Listener and checks        for a response indicating an error. If the registration is errored, the target is not        vulnerable. Otherwise, the target is vulnerable to malicious registrations.      },      'Author'         => ['ir0njaw (Nikita Kelesis) <nikita.elkey[at]gmail.com>'], # of Digital Security [http://dsec.ru]      'References'     =>        [          [ 'CVE', '2012-1675'],          [ 'URL', 'https://seclists.org/fulldisclosure/2012/Apr/204' ],        ],      'DisclosureDate' => '2012-04-18',      'License'        => MSF_LICENSE))    register_options(      [        Opt::RPORT(1521)      ])  end  def run_host(ip)    begin      connect      send_packet = tns_packet("(CONNECT_DATA=(COMMAND=service_register_NSGR))")      sock.put(send_packet)      packet = sock.read(100)      if packet        hex_packet = Rex::Text.to_hex(packet, ':')        split_hex = hex_packet.split(':')        find_packet = /\(ERROR_STACK=\(ERROR=/ === packet        if find_packet == true #TNS Packet returned ERROR          print_error("#{ip}:#{rport} is not vulnerable")        elsif split_hex[5] == '02' #TNS Packet Type: ACCEPT          print_good("#{ip}:#{rport} is vulnerable")        elsif split_hex[5] == '04' #TNS Packet Type: REFUSE          print_error("#{ip}:#{rport} is not vulnerable")        else #All other TNS packet types or non-TNS packet type response cannot guarantee vulnerability          print_error("#{ip}:#{rport} might not be vulnerable")        end      else        print_error("#{ip}:#{rport} is not vulnerable")      end      # TODO: Module should report_vuln if this finding is solid.      rescue ::Rex::ConnectionError, ::Errno::EPIPE      print_error("#{ip}:#{rport} unable to connect to the server")    end  endend