{"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\/pt\/blog\/news\/utechka-poiskovyh-klyuchej-cherez-dns-v-firefox-i-chrome","title":{"rendered":"Vazamento de chaves de pesquisa via DNS no Firefox e Chrome","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

No Firefox e no Chrome foi identificada<\/a><\/noindex> uma caracter\u00edstica do processamento de consultas de busca digitadas na barra de endere\u00e7os, que resulta<\/a><\/noindex> leva ao vazamento de informa\u00e7\u00f5es atrav\u00e9s do servidor DNS do provedor. O cerne do problema \u00e9 que se a consulta de busca consiste apenas em uma palavra, o navegador inicialmente tenta determinar a exist\u00eancia de um host com esse nome no DNS, assumindo que o usu\u00e1rio est\u00e1 tentando abrir um subdom\u00ednio, e s\u00f3 ent\u00e3o redireciona a consulta ao motor de busca. Dessa forma, o propriet\u00e1rio do servidor DNS indicado nas configura\u00e7\u00f5es do usu\u00e1rio obt\u00e9m informa\u00e7\u00f5es sobre consultas de busca de uma \u00fanica palavra, o que \u00e9 considerado uma viola\u00e7\u00e3o de privacidade.<\/p>\n

O problema ocorre ao usar tanto o servidor DNS do provedor quanto os servi\u00e7os 'DNS over HTTPS' (DoH), quando um sufixo DNS \u00e9 configurado nas configura\u00e7\u00f5es (definido por padr\u00e3o ao receber par\u00e2metros via DHCP). A principal quest\u00e3o \u00e9 que, mesmo com o DoH ativado, as consultas continuam sendo enviadas atrav\u00e9s do servidor DNS do provedor especificado no sistema.
\n\u00c9 importante notar que a tentativa de resolu\u00e7\u00e3o ocorre apenas ao enviar consultas de busca consistindo em uma \u00fanica palavra. Com a indica\u00e7\u00e3o de v\u00e1rias palavras, a consulta ao DNS n\u00e3o \u00e9 realizada. <\/p>\n

\"Vazamento<\/a><\/noindex><\/center><\/p>\n

O problema foi confirmado no Firefox e no Chrome, e possivelmente afeta outros navegadores. Os desenvolvedores do Firefox concordaram que o problema existe e pretendem<\/a><\/noindex> fornecer uma solu\u00e7\u00e3o na vers\u00e3o 79 do Firefox. Em particular, para controlar o comportamento ao processar consultas de busca em about:config foi adicionada<\/a><\/noindex> a configura\u00e7\u00e3o<\/a><\/noindex> 'browser.urlbar.dnsResolveSingleWordsAfterSearch', ao definir como '0' bloqueia a resolu\u00e7\u00e3o, '1' (padr\u00e3o) utiliza heur\u00edsticas para resolu\u00e7\u00e3o seletiva e '2' mant\u00e9m o comportamento antigo. As heur\u00edsticas . A estrat\u00e9gia de longo prazo dos desenvolvedores<\/a><\/noindex> na verifica\u00e7\u00e3o da ativa\u00e7\u00e3o do DoH, se existe apenas uma entrada de 'localhost' em \/etc\/hosts e a aus\u00eancia de subdom\u00ednios para o host atual.<\/p>\n

Os desenvolvedores do Chrome prometeram<\/a><\/noindex> limitar o vazamento atrav\u00e9s do DNS, mas a ocorr\u00eancia<\/a><\/noindex> de problema semelhante permanece sem solu\u00e7\u00e3o desde 2015. No Tor Browser, o problema n\u00e3o se manifesta.<\/p>\n

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

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

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