Apache HTTPD mod_negotiation Scanner

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

class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::HttpClient
  include Msf::Auxiliary::Scanner

  def initialize(info = {})
    super(update_info(info,
      'Name'   		=> 'Apache HTTPD mod_negotiation Scanner',
      'Description'	=> %q{
          This module scans the webserver of the given host(s) for the existence of mod_negotiate.
        If the webserver has mod_negotiation enabled, the IP address will be displayed.
      },
      'Author' 		=> [ 'diablohorn [at] gmail.com' ],
      'License'		=> MSF_LICENSE))

    register_options(
      [
        OptString.new('PATH', [ true,  "The path to detect mod_negotiation", '/']),
        OptString.new('FILENAME',[true, "Filename to use as a test",'index'])
      ])
  end

  def run_host(ip)
    ecode = nil
    emesg = nil

    tpath = datastore['PATH']
    tfile = datastore['FILENAME']

    if tpath[-1,1] != '/'
      tpath += '/'
    end

    vhost = datastore['VHOST'] || ip
    prot  = datastore['SSL'] ? 'https' : 'http'

    #
    # Send the request and parse the response headers for an alternates header
    #
    begin
      # Send the request the accept header is key here
      res = send_request_cgi({
        'uri'  		=>  tpath+tfile,
        'method'   	=> 'GET',
        'ctype'     => 'text/html',
        'headers'	=> {'Accept' => 'a/b'}
      }, 20)

      return if not res

      # Check for alternates header
      if(res.code == 406)
        print_status(ip.to_s)
      end

    rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
    rescue ::Timeout::Error, ::Errno::EPIPE
    end

  end
end