{"id":85705,"date":"2020-06-18T13:43:02","date_gmt":"2020-06-18T11:43:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/utechka-poiskovyh-klyuchej-cherez-dns-v-firefox-i-chrome"},"modified":"2020-06-18T13:43:02","modified_gmt":"2020-06-18T11:43:02","slug":"utechka-poiskovyh-klyuchej-cherez-dns-v-firefox-i-chrome","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/utechka-poiskovyh-klyuchej-cherez-dns-v-firefox-i-chrome","title":{"rendered":"Filtraci\u00f3n de claves de b\u00fasqueda a trav\u00e9s de DNS en Firefox y Chrome","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En Firefox y Chrome se ha detectado<\/a><\/noindex> hay una caracter\u00edstica en el procesamiento de las consultas de b\u00fasqueda ingresadas en la barra de direcciones, que presenta<\/a><\/noindex> conlleva a la filtraci\u00f3n de datos a trav\u00e9s del servidor DNS del proveedor. La esencia del problema es que si la consulta de b\u00fasqueda consiste en una sola palabra, el navegador intenta primero determinar en el DNS la existencia de un host con ese nombre, asumiendo que el usuario est\u00e1 tratando de abrir un subdominio, y luego redirige la consulta al motor de b\u00fasqueda. As\u00ed, el propietario del servidor DNS indicado en la configuraci\u00f3n del usuario obtiene informaci\u00f3n sobre las consultas de b\u00fasqueda de una sola palabra, lo que se considera una violaci\u00f3n de la privacidad.<\/p>\n

El problema se manifiesta al utilizar tanto los servidores DNS del proveedor como los servicios de «DNS sobre HTTPS» (DoH), en caso de establecer en la configuraci\u00f3n el sufijo DNS (que se establece por defecto al recibir los par\u00e1metros a trav\u00e9s de DHCP). La principal dificultad es que incluso al activar DoH, las solicitudes siguen envi\u00e1ndose a trav\u00e9s del servidor DNS del proveedor especificado en el sistema.
\nEs importante destacar que el intento de resoluci\u00f3n solo se lleva a cabo al enviar consultas de b\u00fasqueda que consisten en una sola palabra. Al indicar varias palabras, no se hace ninguna consulta al DNS. <\/p>\n

\"Filtraci\u00f3n<\/a><\/noindex><\/center><\/p>\n

El problema ha sido confirmado en Firefox y Chrome, y tambi\u00e9n puede afectar a otros navegadores. Los desarrolladores de Firefox admitieron estar al tanto del problema y incluir el entorno de Rust como una dependencia de construcci\u00f3n obligatoria.<\/a><\/noindex> proporcionar\u00e1n una soluci\u00f3n en la versi\u00f3n 79 de Firefox. En particular, para gestionar el comportamiento en el procesamiento de consultas de b\u00fasqueda en about:config se ha a\u00f1adido<\/a><\/noindex> la configuraci\u00f3n<\/a><\/noindex> «browser.urlbar.dnsResolveSingleWordsAfterSearch», al establecer su valor en «0» se bloquea la resoluci\u00f3n, «1» (por defecto) utiliza heur\u00edsticas para la resoluci\u00f3n selectiva y «2» mantiene el comportamiento anterior. La heur\u00edstica es<\/a><\/noindex> en la verificaci\u00f3n de la activaci\u00f3n de DoH, la existencia \u00fanicamente del registro de ‘localhost’ en \/etc\/hosts y la ausencia de un subdominio para el host actual.<\/p>\n

Los desarrolladores de Chrome prometieron<\/a><\/noindex> quieren limitar la filtraci\u00f3n a trav\u00e9s del DNS, pero mensaje<\/a><\/noindex> un problema similar permanece sin soluci\u00f3n desde 2015. En Tor Browser, el problema no se presenta.<\/p>\n

<\/a><\/noindex><\/p>\n

Fuente: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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