{"id":53188,"date":"2019-11-26T00:00:00","date_gmt":"2019-11-25T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/v-ublock-origin-dobavlena-zashhita-ot-novogo-metoda-otslezhivaniya-manipuliruyushhego-imenami-v-dns"},"modified":"2020-02-18T14:01:04","modified_gmt":"2020-02-18T11:01:04","slug":"v-ublock-origin-dobavlena-zashhita-ot-novogo-metoda-otslezhivaniya-manipuliruyushhego-imenami-v-dns","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/v-ublock-origin-dobavlena-zashhita-ot-novogo-metoda-otslezhivaniya-manipuliruyushhego-imenami-v-dns","title":{"rendered":"In uBlock Origin \u00e8 stata aggiunta una protezione contro un nuovo metodo di tracciamento che manipola i nomi nel DNS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Gli utenti di uBlock Origin  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/uBlockOrigin\/uBlock-issues\/issues\/780\">hanno notato<\/a><\/noindex> l'uso da parte delle reti pubblicitarie e dei sistemi di web analytics di una nuova tecnica per tracciare i movimenti e sostituire i blocchi pubblicitari, che non \u00e8 bloccata in uBlock Origin e in altre estensioni per filtrare contenuti indesiderati. <\/p>\n<p>La sostanza del metodo \u00e8 che i proprietari dei siti, desiderosi di inserire codice per il tracciamento o per la visualizzazione di pubblicit\u00e0, creano un sottodominio nel DNS che fa riferimento a un server della rete pubblicitaria o della web analytics (ad esempio, viene creato un record CNAME f7ds.liberation.fr che punta al server di tracking liberation.eulerian.net). Cos\u00ec, il codice pubblicitario viene formalmente caricato dallo stesso dominio principale del sito e quindi non viene bloccato. Il nome del sottodominio viene scelto come un identificatore casuale, rendendo difficile la sua bloccabilit\u00e0 per maschera, poich\u00e9 il sottodominio correlato alla rete pubblicitaria \u00e8 difficile da distinguere da altri sottodomini utilizzati per caricare risorse locali della pagina. <\/p>\n<p>Lo sviluppatore di uBlock Origin <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/uBlockOrigin\/uBlock-issues\/issues\/780#issuecomment-555643036\">ha proposto<\/a><\/noindex> di utilizzare <noindex><a rel=\"nofollow\" href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Add-ons\/WebExtensions\/API\/dns\">risolve<\/a><\/noindex> il nome nel DNS per determinare l'host correlato tramite CNAME. Il metodo <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/gorhill\/uBlock\/commit\/3a564c199260a857f3d78d5f12b8c3f1aa85b865\">\u00e8 stato implementato<\/a><\/noindex> a partire dalla<br \/>\nversione sperimentale <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/gorhill\/uBlock\/releases\">uBlock Origin 1.24.1b3<\/a><\/noindex>  per <noindex><a rel=\"nofollow\" href=\"https:\/\/addons.mozilla.org\/en-US\/firefox\/addon\/ublock-origin\/\">Firefox<\/a><\/noindex>. Per attivare il controllo nelle impostazioni avanzate, \u00e8 necessario impostare il valore cnameAliasList su &#171;*&#187;, in questo modo tutti i controlli delle blacklist verranno duplicati anche per i nomi definiti tramite CNAME. Durante l'installazione dell'aggiornamento sar\u00e0 necessario fornire autorizzazioni per accedere alle informazioni DNS.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/user-images.githubusercontent.com\/21290713\/69175752-5e7cf180-0b2a-11ea-8ce7-204976ec9c20.png\"><img decoding=\"async\" alt=\"In uBlock Origin \u00e8 stata aggiunta una protezione contro un nuovo metodo di tracciamento che manipola i nomi nel DNS\" src=\"\/wp-content\/uploads\/2019\/11\/a7fc7327de0b87f28de516078bf4ad8b.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Per Chrome, il controllo CNAME non pu\u00f2 essere aggiunto, poich\u00e9 l'API <noindex><a rel=\"nofollow\" href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Add-ons\/WebExtensions\/API\/dns\">dns.resolve()<\/a><\/noindex> \u00e8 disponibile solo per le estensioni in Firefox e non \u00e8 supportata in Chrome. Dal punto di vista delle prestazioni, la determinazione di CNAME non dovrebbe comportare oneri aggiuntivi, oltre a quelli di utilizzo delle risorse di elaborazione per l'applicazione ripetuta delle regole per un altro nome, poich\u00e9 durante l'accesso alla risorsa il browser ha gi\u00e0 effettuato la risoluzione e il valore dovrebbe essere memorizzato nella cache. Il metodo di protezione pu\u00f2 essere aggirato tramite l'associazione diretta del nome a un IP senza l'uso di CNAME, ma questo approccio complica la manutenzione (in caso di cambiamento dell'indirizzo IP della rete pubblicitaria sar\u00e0 necessario far modificare i dati su tutti i server DNS degli editori) e pu\u00f2 essere eluso creando una lista nera degli indirizzi IP dei tracker.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51928\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 uBlock Origin \u0437\u0430\u043c\u0435\u0442\u0438\u043b\u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0440\u0435\u043a\u043b\u0430\u043c\u043d\u044b\u043c\u0438 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[&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":53189,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-53188","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 uBlock Origin \u0437\u0430\u043c\u0435\u0442\u0438\u043b\u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0440\u0435\u043a\u043b\u0430\u043c\u043d\u044b\u043c\u0438 \u0441\u0435\u0442\u044f\u043c\u0438 \u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u043c\u0438 web-\u0430\u043d\u0430\u043b\u0438\u0442\u0438\u043a\u0438 \u043d\u043e\u0432\u043e\u0439 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