{"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\/novosti-interneta\/v-ublock-origin-dobavlena-zashhita-ot-novogo-metoda-otslezhivaniya-manipuliruyushhego-imenami-v-dns","title":{"rendered":"In uBlock Origin \u00e8 stata aggiunta la protezione contro un nuovo metodo di tracciamento che manipola i nomi nel DNS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Utenti di uBlock Origin  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/uBlockOrigin\/uBlock-issues\/issues\/780\">\u00e8 stato notato<\/a><\/noindex> l'uso da parte delle reti pubblicitarie e dei sistemi di web analytics di nuove tecniche per monitorare i movimenti e inserire blocchi pubblicitari, che non vengono bloccati 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 della pubblicit\u00e0 creano un sottodominio separato nel DNS, che punta a un server della rete pubblicitaria o di web analytics (ad esempio, viene creata una registrazione CNAME f7ds.liberation.fr, che punta al server di tracciamento liberation.eulerian.net). In questo modo, il codice pubblicitario viene formalmente caricato dallo stesso dominio principale del sito e pertanto non \u00e8 soggetto a blocco. Il nome del sottodominio viene scelto sotto forma di identificatore casuale, il che rende difficile il blocco per maschera, poich\u00e9 il sottodominio associato alla rete pubblicitaria \u00e8 difficile da distinguere dai sottodomini utilizzati per caricare altre risorse locali della pagina. <\/p>\n<p>Sviluppatore di uBlock Origin <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/uBlockOrigin\/uBlock-issues\/issues\/780#issuecomment-555643036\">ha proposto<\/a><\/noindex> utilizzare <noindex><a rel=\"nofollow\" href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Add-ons\/WebExtensions\/API\/dns\">risoluzione<\/a><\/noindex> del nome nel DNS per determinare l'host associato tramite CNAME. Metodo <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/gorhill\/uBlock\/commit\/3a564c199260a857f3d78d5f12b8c3f1aa85b865\">implementato<\/a><\/noindex> a partire da<br \/>\nrilascio 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 caso tutti i controlli delle blacklist verranno duplicati anche per i nomi determinati tramite CNAME. Durante l'installazione dell'aggiornamento sar\u00e0 necessario fornire autorizzazioni per ottenere informazioni dal 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 la 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 del CNAME non dovrebbe comportare spese aggiuntive, oltre all'utilizzo delle risorse del processore per riapplicare le regole a un altro nome, poich\u00e9 quando si accede a una risorsa il browser ha gi\u00e0 effettuato la risoluzione e il valore dovrebbe essere memorizzato nella cache. Il metodo di protezione pu\u00f2 essere bypassato tramite un'associazione diretta del nome all'IP senza l'uso del CNAME, ma questo approccio complica la gestione (in caso di cambio dell'indirizzo IP della rete pubblicitaria, sar\u00e0 necessario ottenere la modifica dei dati su tutti i server DNS degli editori) e pu\u00f2 essere aggirato 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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\u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430. \u0421\u0443\u0442\u044c \u043c\u0435\u0442\u043e\u0434\u0430 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0432\u043b\u0430\u0434\u0435\u043b\u044c\u0446\u044b \u0441\u0430\u0439\u0442\u043e\u0432, \u0436\u0435\u043b\u0430\u044e\u0449\u0438\u0435 \u0440\u0430\u0437\u043c\u0435\u0441\u0442\u0438\u0442\u044c \u043a\u043e\u0434 \u0434\u043b\u044f \u043e\u0442\u0441\u043b\u0435\u0436\u0438\u0432\u0430\u043d\u0438\u044f \u0438\u043b\u0438 \u043f\u043e\u043a\u0430\u0437\u0430 \u0440\u0435\u043a\u043b\u0430\u043c\u044b, \u0441\u043e\u0437\u0434\u0430\u044e\u0442 \u0432 DNS \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0439 \u043f\u043e\u0434\u0434\u043e\u043c\u0435\u043d, \u0441\u0441\u044b\u043b\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440 \u0440\u0435\u043a\u043b\u0430\u043c\u043d\u043e\u0439 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