{"id":100172,"date":"2021-05-15T22:22:39","date_gmt":"2021-05-15T20:22:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/identifikacziya-cherez-analiz-vneshnih-obrabotchikov-protokolov-v-brauzere"},"modified":"2021-05-15T22:22:39","modified_gmt":"2021-05-15T20:22:39","slug":"identifikacziya-cherez-analiz-vneshnih-obrabotchikov-protokolov-v-brauzere","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/identifikacziya-cherez-analiz-vneshnih-obrabotchikov-protokolov-v-brauzere","title":{"rendered":"Identificazione tramite analisi dei gestori esterni dei protocolli nel browser","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Gli sviluppatori della libreria fingerprintjs, che consente di generare identificatori del browser in modalit\u00e0 passiva sulla base di indizi indiretti come la risoluzione dello schermo, le caratteristiche di WebGL, l'elenco dei plugin installati e dei font, hanno presentato un nuovo metodo di identificazione, basato sulla valutazione delle applicazioni tipiche installate dall'utente e funzionante tramite la verifica del supporto nel browser di gestori di protocollo aggiuntivi. Il codice dello script con l'implementazione del metodo \u00e8 pubblicato con licenza MIT. <\/p>\n

La verifica avviene mediante l'analisi del binding dei gestori a 32 applicazioni popolari. Ad esempio, determinando la presenza nel browser di gestori degli URL telegram:\/\/, slack:\/\/ e skype:\/\/, si pu\u00f2 concludere che nel sistema siano presenti le applicazioni telegram, slack e skype, e utilizzare queste informazioni come indizio nella generazione dell'identificatore di sistema. Poich\u00e9 l'elenco dei gestori \u00e8 identico per tutti i browser del sistema, l'identificatore non cambia al variare del browser ed \u00e8 utilizzabile in Chrome, Firefox, Safari, Brave, Yandex Browser, Edge e persino in Tor Browser. <\/p>\n

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Per determinare la presenza di un'applicazione, lo script tenta di aprire in una finestra popup un link associato a un gestore esterno, dopo di che il browser mostra una finestra di dialogo con la proposta di aprire il contenuto nell'applicazione collegata, se l'applicazione controllata \u00e8 presente, oppure visualizza una pagina di errore se l'applicazione non \u00e8 nel sistema. Attraverso un'analisi sequenziale dei gestori esterni tipici e l'analisi delle risposte d'errore, si pu\u00f2 dedurre la presenza nel sistema dei programmi controllati. <\/p>\n

In Chrome 90 per Linux, il metodo non ha funzionato e il browser ha mostrato un dialogo standard di conferma operazione per ogni tentativo di verifica del gestore (il metodo funziona in Chrome per Windows e macOS). In Firefox 88 per Linux, sia in modalit\u00e0 normale che in incognito, lo script ha rilevato la presenza di applicazioni aggiuntive installate dalla lista, e l'accuratezza dell'identificazione \u00e8 stata stimata al 99,87% (35 corrispondenze simili su 26.000 test effettuati). Un identificatore \u00e8 stato generato nel Tor Browser eseguito sullo stesso sistema, corrispondente al test in Firefox. <\/p>\n

\u00c8 interessante notare che la protezione aggiuntiva nel Tor Browser ha avuto un effetto indesiderato, offrendo l'opportunit\u00e0 di effettuare l'identificazione senza che l'utente se ne accorgesse. A causa della disattivazione nel Tor Browser dei dialoghi di conferma per l'uso di gestori esterni, le richieste di verifica possono essere aperte in iframe, invece che in una finestra popup (per distinguere la presenza dalla mancanza di gestori, le regole same-origin bloccano l'accesso a pagine con errori e consentono l'accesso a pagine about:blank). A causa della protezione contro il flooding, il controllo nel Tor Browser richiede un tempo significativamente pi\u00f9 lungo (10 secondi per applicazione).
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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