mirror of
https://github.com/YunoHost-Apps/spip_ynh.git
synced 2024-09-03 20:25:59 +02:00
758 lines
18 KiB
PHP
758 lines
18 KiB
PHP
<?php
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/*
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* ecran_securite.php
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* ------------------
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*/
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define('_ECRAN_SECURITE', '1.5.3'); // 2023-05-31
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/*
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* Documentation : https://www.spip.net/fr_article4200.html
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*/
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/*
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* Test utilisateur
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*/
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if (isset($_GET['test_ecran_securite'])) {
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$ecran_securite_raison = 'test ' . _ECRAN_SECURITE;
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}
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if (file_exists($f = __DIR__ . DIRECTORY_SEPARATOR . 'ecran_securite_options.php')) {
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include ($f);
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}
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/*
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* Monitoring
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* var_isbot=0 peut etre utilise par un bot de monitoring pour surveiller la disponibilite d'un site vu par les users
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* var_isbot=1 peut etre utilise pour monitorer la disponibilite pour les bots (sujets a 503 de delestage si
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* le load depasse ECRAN_SECURITE_LOAD)
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*/
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if (!defined('_IS_BOT') and isset($_GET['var_isbot'])) {
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define('_IS_BOT', $_GET['var_isbot'] ? true : false);
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}
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/*
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* Détecteur de robot d'indexation
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*/
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if (!defined('_IS_BOT')) {
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define(
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'_IS_BOT',
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isset($_SERVER['HTTP_USER_AGENT'])
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and preg_match(
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','
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. implode('|', array(
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// mots generiques
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'bot',
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'slurp',
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'crawler',
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'crwlr',
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'java',
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'monitoring',
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'spider',
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'webvac',
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'yandex',
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'MSIE 6\.0', // botnet 99,9% du temps
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// UA plus cibles
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'200please',
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'80legs',
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'a6-indexer',
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'aboundex',
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'accoona',
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'acrylicapps',
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'addthis',
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'adressendeutschland',
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'alexa',
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'altavista',
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'analyticsseo',
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'antennapod',
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'arachnys',
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'archive',
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'argclrint',
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'aspseek',
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'baidu',
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'begunadvertising',
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'bing',
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'bloglines',
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'buck',
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'browsershots',
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'bubing',
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'butterfly',
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'changedetection',
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'charlotte',
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'chilkat',
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'china',
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'coccoc',
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'crowsnest',
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'dataminr',
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'daumoa',
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'dlvr\.it',
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'dlweb',
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'drupal',
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'ec2linkfinder',
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'eset\.com',
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'estyle',
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'exalead',
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'ezooms',
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'facebookexternalhit',
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'facebookplatform',
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'fairshare',
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'feedfetcher',
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'feedfetcher-google',
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'feedly',
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'fetch',
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'flipboardproxy',
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'genieo',
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'google',
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'go-http-client',
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'grapeshot',
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'hatena-useragent',
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'head',
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'hosttracker',
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'hubspot',
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'ia_archiver',
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'ichiro',
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'iltrovatore-setaccio',
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'immediatenet',
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'ina',
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'inoreader',
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'infegyatlas',
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'infohelfer',
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'instapaper',
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'jabse',
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'james',
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'jersey',
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'kumkie',
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'linkdex',
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'linkfluence',
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'linkwalker',
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'litefinder',
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'loadimpactpageanalyzer',
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'ltx71',
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'luminate',
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'lycos',
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'lycosa',
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'mediapartners-google',
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'msai',
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'myapp',
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'nativehost',
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'najdi',
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'netcraftsurveyagent',
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'netestate',
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'netseer',
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'netnewswire',
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'newspaper',
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'newsblur',
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'nuhk',
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'nuzzel',
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'okhttp',
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'otmedia',
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'owlin',
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'owncloud',
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'panscient',
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'paper\.li',
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'parsijoo',
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'protopage',
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'plukkie',
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'proximic',
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'pubsub',
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'python',
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'qirina',
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'qoshe',
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'qualidator',
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'qwantify',
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'rambler',
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'readability',
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'ruby',
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'sbsearch',
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'scoop\.it',
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'scooter',
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'scoutjet',
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'scrapy',
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'scrubby',
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'scrubbybloglines',
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'shareaholic',
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'shopwiki',
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'simplepie',
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'sistrix',
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'sitechecker',
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'siteexplorer',
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'snapshot',
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'sogou',
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'special_archiver',
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'speedy',
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'spinn3r',
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'spreadtrum',
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'steeler',
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'subscriber',
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'suma',
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'superdownloads',
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'svenska-webbsido',
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'teoma',
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'the knowledge AI',
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'thumbshots',
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'tineye',
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'traackr',
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'trendiction',
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'trendsmap',
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'tweetedtimes',
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'tweetmeme',
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'universalfeedparser',
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'uaslinkchecker',
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'undrip',
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'unwindfetchor',
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'upday',
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'vedma',
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'vkshare',
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'vm',
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'wch',
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'webalta',
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'webcookies',
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'webparser',
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'webthumbnail',
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'wesee',
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'wise-guys',
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'woko',
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'wordpress',
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'wotbox',
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'y!j-bri',
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'y!j-bro',
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'y!j-brw',
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'y!j-bsc',
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'yahoo',
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'yahoo!',
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'yahooysmcm',
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'ymobactus',
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'yats',
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'yeti',
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'zeerch'
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)) . ',i',
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(string)$_SERVER['HTTP_USER_AGENT']
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)
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);
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}
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if (!defined('_IS_BOT_FRIEND')) {
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define(
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'_IS_BOT_FRIEND',
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isset($_SERVER['HTTP_USER_AGENT'])
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and preg_match(
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',' . implode('|', array(
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'facebookexternalhit',
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'twitterbot',
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'flipboardproxy',
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'wordpress'
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)) . ',i',
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(string)$_SERVER['HTTP_USER_AGENT']
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)
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);
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}
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/*
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* Interdit de passer une variable id_article (ou id_xxx) qui ne
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* soit pas numérique (ce qui bloque l'exploitation de divers trous
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* de sécurité, dont celui de toutes les versions < 1.8.2f)
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* (sauf pour id_table, qui n'est pas numérique jusqu'à [5743])
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* (id_base est une variable de la config des widgets de WordPress)
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*/
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$_exceptions = array('id_table', 'id_base', 'id_parent', 'id_article_pdf');
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foreach ($_GET as $var => $val) {
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if (
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$_GET[$var] and strncmp($var, "id_", 3) == 0
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and !in_array($var, $_exceptions)
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) {
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$_GET[$var] = is_array($_GET[$var]) ? @array_map('intval', $_GET[$var]) : intval($_GET[$var]);
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}
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}
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foreach ($_POST as $var => $val) {
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if (
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$_POST[$var] and strncmp($var, "id_", 3) == 0
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and !in_array($var, $_exceptions)
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) {
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$_POST[$var] = is_array($_POST[$var]) ? @array_map('intval', $_POST[$var]) : intval($_POST[$var]);
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}
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}
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foreach ($GLOBALS as $var => $val) {
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if (
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$GLOBALS[$var] and strncmp($var, "id_", 3) == 0
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and !in_array($var, $_exceptions)
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) {
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$GLOBALS[$var] = is_array($GLOBALS[$var]) ? @array_map('intval', $GLOBALS[$var]) : intval($GLOBALS[$var]);
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}
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}
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/*
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* Interdit la variable $cjpeg_command, qui était utilisée sans
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* précaution dans certaines versions de dev (1.8b2 -> 1.8b5)
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*/
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$cjpeg_command = '';
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/*
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* Contrôle de quelques variables (XSS)
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*/
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foreach (array('lang', 'var_recherche', 'aide', 'var_lang_r', 'lang_r', 'var_ajax_ancre', 'nom_fichier') as $var) {
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if (isset($_GET[$var])) {
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$_REQUEST[$var] = $GLOBALS[$var] = $_GET[$var] = preg_replace(',[^\w\,/#&;-]+,', ' ', (string)$_GET[$var]);
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}
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if (isset($_POST[$var])) {
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$_REQUEST[$var] = $GLOBALS[$var] = $_POST[$var] = preg_replace(',[^\w\,/#&;-]+,', ' ', (string)$_POST[$var]);
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}
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}
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/*
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* Filtre l'accès à spip_acces_doc (injection SQL en 1.8.2x)
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*/
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if (isset($_SERVER['REQUEST_URI'])) {
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if (preg_match(',^(.*/)?spip_acces_doc\.,', (string)$_SERVER['REQUEST_URI'])) {
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$file = addslashes((string)$_GET['file']);
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}
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}
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/*
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* Pas d'inscription abusive
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*/
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if (
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isset($_REQUEST['mode']) and isset($_REQUEST['page'])
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and !in_array($_REQUEST['mode'], array("6forum", "1comite"))
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and $_REQUEST['page'] == "identifiants"
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) {
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$ecran_securite_raison = "identifiants";
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}
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/*
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* Agenda joue à l'injection php
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*/
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if (
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isset($_REQUEST['partie_cal'])
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and $_REQUEST['partie_cal'] !== htmlentities((string)$_REQUEST['partie_cal'])
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) {
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$ecran_securite_raison = "partie_cal";
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}
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if (
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isset($_REQUEST['echelle'])
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and $_REQUEST['echelle'] !== htmlentities((string)$_REQUEST['echelle'])
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) {
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$ecran_securite_raison = "echelle";
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}
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/*
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* Espace privé
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*/
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if (
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isset($_REQUEST['exec'])
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and !preg_match(',^[\w-]+$,', (string)$_REQUEST['exec'])
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) {
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$ecran_securite_raison = "exec";
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}
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if (
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isset($_REQUEST['cherche_auteur'])
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and preg_match(',[<],', (string)$_REQUEST['cherche_auteur'])
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) {
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$ecran_securite_raison = "cherche_auteur";
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}
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if (
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isset($_REQUEST['exec'])
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and $_REQUEST['exec'] == 'auteurs'
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and isset($_REQUEST['recherche'])
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and preg_match(',[<],', (string)$_REQUEST['recherche'])
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) {
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$ecran_securite_raison = "recherche";
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}
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if (
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isset($_REQUEST['exec'])
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and $_REQUEST['exec'] == 'info_plugin'
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and isset($_REQUEST['plugin'])
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and preg_match(',[<],', (string)$_REQUEST['plugin'])
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) {
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$ecran_securite_raison = "plugin";
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}
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if (
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isset($_REQUEST['exec'])
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and $_REQUEST['exec'] == 'puce_statut'
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and isset($_REQUEST['id'])
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and !intval($_REQUEST['id'])
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) {
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$ecran_securite_raison = "puce_statut";
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}
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if (
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isset($_REQUEST['action'])
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and $_REQUEST['action'] == 'configurer'
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) {
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if (
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@file_exists('inc_version.php')
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or @file_exists('ecrire/inc_version.php')
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) {
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function action_configurer() {
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include_spip('inc/autoriser');
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if (!autoriser('configurer', _request('configuration'))) {
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include_spip('inc/minipres');
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echo minipres(_T('info_acces_interdit'));
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exit;
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}
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require _DIR_RESTREINT . 'action/configurer.php';
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action_configurer_dist();
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}
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}
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}
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if (
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isset($_REQUEST['action'])
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and $_REQUEST['action'] == 'ordonner_liens_documents'
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and isset($_REQUEST['ordre'])
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and is_string($_REQUEST['ordre'])
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) {
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$ecran_securite_raison = "ordre a la chaine";
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}
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/*
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* Bloque les requêtes contenant %00 (manipulation d'include)
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*/
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if (strpos(
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(function_exists('get_magic_quotes_gpc') and @get_magic_quotes_gpc())
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? stripslashes(serialize($_REQUEST))
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: serialize($_REQUEST),
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chr(0)
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) !== false) {
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$ecran_securite_raison = "%00";
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}
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/*
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* Bloque les requêtes fond=formulaire_
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*/
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if (
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isset($_REQUEST['fond'])
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and preg_match(',^formulaire_,i', $_REQUEST['fond'])
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) {
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$ecran_securite_raison = "fond=formulaire_";
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}
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/*
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* Bloque les requêtes du type ?GLOBALS[type_urls]=toto (bug vieux php)
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*/
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if (isset($_REQUEST['GLOBALS'])) {
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$ecran_securite_raison = "GLOBALS[GLOBALS]";
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}
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/*
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* Bloque les requêtes des bots sur:
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* les agenda
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* les paginations entremélées
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*/
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if (_IS_BOT) {
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if (
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(isset($_REQUEST['echelle']) and isset($_REQUEST['partie_cal']) and isset($_REQUEST['type']))
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or (strpos((string)$_SERVER['REQUEST_URI'], 'debut_') and preg_match(',[?&]debut_.*&debut_,', (string)$_SERVER['REQUEST_URI']))
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or (isset($_REQUEST['calendrier_annee']) and strpos((string)$_SERVER['REQUEST_URI'], 'debut_'))
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or (isset($_REQUEST['calendrier_annee']) and preg_match(',[?&]calendrier_annee=.*&calendrier_annee=,', (string)$_SERVER['REQUEST_URI']))
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) {
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$ecran_securite_raison = "robot agenda/double pagination";
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}
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}
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/*
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* Bloque une vieille page de tests de CFG (<1.11)
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* Bloque un XSS sur une page inexistante
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*/
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if (isset($_REQUEST['page'])) {
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if ($_REQUEST['page'] == 'test_cfg') {
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$ecran_securite_raison = "test_cfg";
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}
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if ($_REQUEST['page'] !== htmlspecialchars((string)$_REQUEST['page'])) {
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$ecran_securite_raison = "xsspage";
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}
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if (
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$_REQUEST['page'] == '404'
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and isset($_REQUEST['erreur'])
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) {
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$ecran_securite_raison = "xss404";
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}
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}
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/*
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* XSS par array
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*/
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foreach (array('var_login') as $var) {
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if (isset($_REQUEST[$var]) and is_array($_REQUEST[$var])) {
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$ecran_securite_raison = "xss " . $var;
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}
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}
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/*
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* Parade antivirale contre un cheval de troie
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*/
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if (!function_exists('tmp_lkojfghx')) {
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function tmp_lkojfghx() {}
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function tmp_lkojfghx2($a = 0, $b = 0, $c = 0, $d = 0) {
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// si jamais on est arrivé ici sur une erreur php
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// et qu'un autre gestionnaire d'erreur est défini, l'appeller
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if ($b && $GLOBALS['tmp_xhgfjokl']) {
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call_user_func($GLOBALS['tmp_xhgfjokl'], $a, $b, $c, $d);
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}
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}
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}
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if (isset($_POST['tmp_lkojfghx3'])) {
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$ecran_securite_raison = "gumblar";
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}
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/*
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* Outils XML mal sécurisés < 2.0.9
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*/
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if (isset($_REQUEST['transformer_xml'])) {
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$ecran_securite_raison = "transformer_xml";
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}
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/*
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* Outils XML mal sécurisés again
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*/
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if (isset($_REQUEST['var_url']) and $_REQUEST['var_url'] and isset($_REQUEST['exec']) and $_REQUEST['exec'] == 'valider_xml') {
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$url = trim($_REQUEST['var_url']);
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if (
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strncmp($url, '/', 1) == 0
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or (($p = strpos($url, '..')) !== false and strpos($url, '..', $p + 3) !== false)
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or (($p = strpos($url, '..')) !== false and strpos($url, 'IMG', $p + 3) !== false)
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or (strpos($url, '://') !== false or strpos($url, ':\\') !== false)
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) {
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$ecran_securite_raison = 'URL interdite pour var_url';
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}
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}
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/*
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* Sauvegarde mal securisée < 2.0.9
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*/
|
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if (
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isset($_REQUEST['nom_sauvegarde'])
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and strstr((string)$_REQUEST['nom_sauvegarde'], '/')
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) {
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$ecran_securite_raison = 'nom_sauvegarde manipulee';
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}
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if (
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isset($_REQUEST['znom_sauvegarde'])
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and strstr((string)$_REQUEST['znom_sauvegarde'], '/')
|
|
) {
|
|
$ecran_securite_raison = 'znom_sauvegarde manipulee';
|
|
}
|
|
|
|
|
|
/*
|
|
* op permet des inclusions arbitraires ;
|
|
* on vérifie 'page' pour ne pas bloquer ... drupal
|
|
*/
|
|
if (
|
|
isset($_REQUEST['op']) and isset($_REQUEST['page'])
|
|
and $_REQUEST['op'] !== preg_replace('/[^\\-\w]/', '', $_REQUEST['op'])
|
|
) {
|
|
$ecran_securite_raison = 'op';
|
|
}
|
|
|
|
/*
|
|
* Forms & Table ne se méfiait pas assez des uploads de fichiers
|
|
*/
|
|
if (count($_FILES)) {
|
|
foreach ($_FILES as $k => $v) {
|
|
if (
|
|
preg_match(',^fichier_\d+$,', $k)
|
|
and preg_match(',\.php,i', $v['name'])
|
|
) {
|
|
unset($_FILES[$k]);
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* et Contact trop laxiste avec une variable externe
|
|
* on bloque pas le post pour eviter de perdre des donnees mais on unset la variable et c'est tout
|
|
*/
|
|
if (isset($_REQUEST['pj_enregistrees_nom']) and $_REQUEST['pj_enregistrees_nom']) {
|
|
unset($_REQUEST['pj_enregistrees_nom']);
|
|
unset($_GET['pj_enregistrees_nom']);
|
|
unset($_POST['pj_enregistrees_nom']);
|
|
}
|
|
|
|
/*
|
|
* reinstall=oui un peu trop permissif
|
|
*/
|
|
if (
|
|
isset($_REQUEST['reinstall'])
|
|
and $_REQUEST['reinstall'] == 'oui'
|
|
) {
|
|
$ecran_securite_raison = 'reinstall=oui';
|
|
}
|
|
|
|
/*
|
|
* Pas d'action pendant l'install
|
|
*/
|
|
if (isset($_REQUEST['exec']) and $_REQUEST['exec'] === 'install' and isset($_REQUEST['action'])) {
|
|
$ecran_securite_raison = 'install&action impossibles';
|
|
}
|
|
|
|
/*
|
|
* Échappement xss referer
|
|
*/
|
|
if (isset($_SERVER['HTTP_REFERER'])) {
|
|
$_SERVER['HTTP_REFERER'] = strtr($_SERVER['HTTP_REFERER'], '<>"\'', '[]##');
|
|
}
|
|
|
|
|
|
/*
|
|
* Echappement HTTP_X_FORWARDED_HOST
|
|
*/
|
|
if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
|
|
$_SERVER['HTTP_X_FORWARDED_HOST'] = strtr($_SERVER['HTTP_X_FORWARDED_HOST'], "<>?\"\{\}\$'` \r\n", '____________');
|
|
}
|
|
|
|
|
|
/*
|
|
* Pas d'erreur dans l'erreur
|
|
*/
|
|
if (isset($_REQUEST['var_erreur']) and isset($_REQUEST['page']) and $_REQUEST['page'] === 'login') {
|
|
if (strlen($_REQUEST['var_erreur']) !== strcspn($_REQUEST['var_erreur'], '<>')) {
|
|
$ecran_securite_raison = 'var_erreur incorrecte';
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Réinjection des clés en html dans l'admin r19561
|
|
*/
|
|
if (
|
|
(isset($_SERVER['REQUEST_URI']) and strpos($_SERVER['REQUEST_URI'], "ecrire/") !== false)
|
|
or isset($_REQUEST['var_memotri'])
|
|
) {
|
|
$zzzz = implode("", array_keys($_REQUEST));
|
|
if (strlen($zzzz) != strcspn($zzzz, '<>"\'')) {
|
|
$ecran_securite_raison = 'Cle incorrecte en $_REQUEST';
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Injection par connect
|
|
*/
|
|
if (
|
|
isset($_REQUEST['connect'])
|
|
// cas qui permettent de sortir d'un commentaire PHP
|
|
and (
|
|
strpos($_REQUEST['connect'], "?") !== false
|
|
or strpos($_REQUEST['connect'], "<") !== false
|
|
or strpos($_REQUEST['connect'], ">") !== false
|
|
or strpos($_REQUEST['connect'], "\n") !== false
|
|
or strpos($_REQUEST['connect'], "\r") !== false
|
|
)
|
|
) {
|
|
$ecran_securite_raison = "malformed connect argument";
|
|
}
|
|
|
|
|
|
/*
|
|
* _oups donc
|
|
*/
|
|
if (
|
|
isset($_REQUEST['_oups'])
|
|
and base64_decode($_REQUEST['_oups'], true) === false) {
|
|
$ecran_securite_raison = "malformed _oups argument";
|
|
}
|
|
|
|
if (
|
|
isset($_REQUEST['formulaire_action_args']) || isset($_REQUEST['var_login'])
|
|
) {
|
|
foreach ($_REQUEST as $k => $v) {
|
|
if (is_string($v)
|
|
and strpbrk($v, "&\"'<>") !== false
|
|
and preg_match(',^[abis]:\d+[:;],', $v)
|
|
and __ecran_test_if_serialized($v)
|
|
) {
|
|
$_REQUEST[$k] = htmlspecialchars($v, ENT_QUOTES);
|
|
if (isset($_POST[$k])) $_POST[$k] = $_REQUEST[$k];
|
|
if (isset($_GET[$k])) $_GET[$k] = $_REQUEST[$k];
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* Version simplifiée de https://developer.wordpress.org/reference/functions/is_serialized/
|
|
*/
|
|
function __ecran_test_if_serialized($data) {
|
|
$data = trim($data);
|
|
if ('N;' === $data) {return true;}
|
|
if (strlen($data) < 4) {return false;}
|
|
if (':' !== $data[1]) {return false;}
|
|
$semicolon = strpos($data, ';');
|
|
$brace = strpos($data, '}');
|
|
// Either ; or } must exist.
|
|
if (false === $semicolon && false === $brace) {return false;}
|
|
// But neither must be in the first X characters.
|
|
if (false !== $semicolon && $semicolon < 3) {return false;}
|
|
if (false !== $brace && $brace < 4) {return false;}
|
|
$token = $data[0];
|
|
if (in_array($token, array('s', 'S', 'a', 'O', 'C', 'o', 'E'))) {
|
|
if (in_array($token, array('s', 'S')) and false === strpos($data, '"')) {return false;}
|
|
return (bool)preg_match("/^{$token}:[0-9]+:/s", $data);
|
|
} elseif (in_array($token, array('b', 'i', 'd'))) {
|
|
return (bool)preg_match("/^{$token}:[0-9.E+-]+;/", $data);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/*
|
|
* S'il y a une raison de mourir, mourons
|
|
*/
|
|
if (isset($ecran_securite_raison)) {
|
|
header("HTTP/1.0 403 Forbidden");
|
|
header("Expires: Wed, 11 Jan 1984 05:00:00 GMT");
|
|
header("Cache-Control: no-cache, must-revalidate");
|
|
header("Pragma: no-cache");
|
|
header("Content-Type: text/html");
|
|
header("Connection: close");
|
|
die("<html><title>Error 403: Forbidden</title><body><h1>Error 403</h1><p>You are not authorized to view this page ($ecran_securite_raison)</p></body></html>");
|
|
}
|
|
|
|
/*
|
|
* Un filtre filtrer_entites securise
|
|
*/
|
|
if (!function_exists('filtre_filtrer_entites_dist')) {
|
|
function filtre_filtrer_entites_dist($t) {
|
|
include_spip('inc/texte');
|
|
return interdire_scripts(filtrer_entites($t));
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Fin sécurité
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
* Bloque les bots quand le load déborde
|
|
*/
|
|
if (!defined('_ECRAN_SECURITE_LOAD')) {
|
|
define('_ECRAN_SECURITE_LOAD', 4);
|
|
}
|
|
|
|
if (
|
|
defined('_ECRAN_SECURITE_LOAD')
|
|
and _ECRAN_SECURITE_LOAD > 0
|
|
and _IS_BOT
|
|
and !_IS_BOT_FRIEND
|
|
and $_SERVER['REQUEST_METHOD'] === 'GET'
|
|
and (
|
|
(function_exists('sys_getloadavg')
|
|
and $load = sys_getloadavg()
|
|
and is_array($load)
|
|
and $load = array_shift($load))
|
|
or
|
|
(@is_readable('/proc/loadavg')
|
|
and $load = file_get_contents('/proc/loadavg')
|
|
and $load = floatval($load))
|
|
)
|
|
and $load > _ECRAN_SECURITE_LOAD // eviter l'evaluation suivante si de toute facon le load est inferieur a la limite
|
|
and rand(0, (int) ($load * $load)) > _ECRAN_SECURITE_LOAD * _ECRAN_SECURITE_LOAD
|
|
) {
|
|
//https://webmasters.stackexchange.com/questions/65674/should-i-return-a-429-or-503-status-code-to-a-bot
|
|
header("HTTP/1.0 429 Too Many Requests");
|
|
header("Retry-After: 300");
|
|
header("Expires: Wed, 11 Jan 1984 05:00:00 GMT");
|
|
header("Cache-Control: no-cache, must-revalidate");
|
|
header("Pragma: no-cache");
|
|
header("Content-Type: text/html");
|
|
header("Connection: close");
|
|
die("<html><title>Status 429: Too Many Requests</title><body><h1>Status 429</h1><p>Too Many Requests (try again soon)</p></body></html>");
|
|
}
|