{"id":104087,"date":"2022-05-19T03:36:51","date_gmt":"2022-05-19T01:36:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-dns-servera-bind-c-ustraneniem-uyazvimosti-v-realizaczii-dns-over-https"},"modified":"2022-05-19T03:36:51","modified_gmt":"2022-05-19T01:36:51","slug":"obnovlenie-dns-servera-bind-c-ustraneniem-uyazvimosti-v-realizaczii-dns-over-https","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/obnovlenie-dns-servera-bind-c-ustraneniem-uyazvimosti-v-realizaczii-dns-over-https","title":{"rendered":"Aktualiz\u00e1cia DNS servera BIND s odstr\u00e1nen\u00edm zranite\u013enosti v implement\u00e1cii DNS-over-HTTPS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Boli zverejnen\u00e9 opravy stabiln\u00fdch aktualiz\u00e1ci\u00ed DNS servera BIND 9.16.28 a 9.18.3, ako aj nov\u00fd vydanie experiment\u00e1lnej vetvy 9.19.1. V verzi\u00e1ch 9.18.3 a 9.19.1 bola odstr\u00e1nen\u00e1 zranite\u013enos\u0165 (CVE-2022-1183) v implement\u00e1cii mechanizmu DNS-over-HTTPS, ktor\u00fd sa podporuje od vetvy 9.18. Zranite\u013enos\u0165 vedie k hav\u00e1rii procesu named, ak je TLS pripojenie na obsluhovate\u013ea zalo\u017een\u00e9 na protokole HTTP pred\u010dasne preru\u0161en\u00e9. Probl\u00e9m sa t\u00fdka len servery<\/a>, obsluhuj\u00facich po\u017eiadavky DNS over HTTPS (DoH). Servery, ktor\u00e9 prij\u00edmaj\u00fa po\u017eiadavky cez DNS over TLS (DoT) a nepou\u017e\u00edvaj\u00fa DoH, nie s\u00fa touto probl\u00e9mom ovplyvnen\u00e9. <\/p>\n

Vo verzii 9.18.3 bolo pridan\u00fdch nieko\u013eko funk\u010dn\u00fdch vylep\u0161en\u00ed. Pridan\u00e1 bola podpora druhej verzie katal\u00f3gu z\u00f3n («Catalog Zones»), definovanej v piatom n\u00e1vrhu \u0161pecifik\u00e1cie IETF. Katal\u00f3g z\u00f3n pon\u00faka nov\u00fa met\u00f3du spr\u00e1vy sekund\u00e1rnych DNS serverov, pri ktorej sa namiesto definovania jednotliv\u00fdch z\u00e1znamov na sekund\u00e1rnom serveri pre ka\u017ed\u00fa sekund\u00e1rnu z\u00f3nu, organizuje prenos ur\u010dit\u00e9ho s\u00faboru sekund\u00e1rnych z\u00f3n medzi prim\u00e1rnym a sekund\u00e1rnym serverom. T.j. nastaven\u00edm prenosu katal\u00f3gu analogicky k prenosu jednotliv\u00fdch z\u00f3n, z\u00f3ny vytv\u00e1ran\u00e9 na prim\u00e1rnom serveri a ozna\u010den\u00e9 ako patr\u00edce do katal\u00f3gu, sa automaticky vytvoria na sekund\u00e1rnom serveri bez potreby \u00fapravy konfigura\u010dn\u00fdch s\u00faborov. <\/p>\n

V novej verzii bola pridan\u00e1 aj podpora roz\u0161\u00edren\u00fdch ch\u00fdb «Stale Answer» a «Stale NXDOMAIN Answer», ktor\u00e9 sa vyd\u00e1vaj\u00fa, ke\u010f zastaran\u00e1 odpove\u010f je vr\u00e1ten\u00e1 z cache. V named a dig je integrovan\u00e1 schopnos\u0165 overovania vonkaj\u0161\u00edch TLS-certifik\u00e1tov<\/a>, \u010do sa d\u00e1 pou\u017ei\u0165 na organiz\u00e1ciu pr\u00edsnej alebo zdie\u013eanej autentifik\u00e1cie na b\u00e1ze TLS (RFC 9103).
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0445 \u0432\u0435\u0442\u043e\u043a DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 BIND 9.16.28 \u0438 9.18.3, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043d\u043e\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 9.19.1. \u0412 \u0432\u0435\u0440\u0441\u0438\u044f\u0445 9.18.3 \u0438 9.19.1 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-1183) \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 DNS-over-HTTPS, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u043e\u0433\u043e \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0442\u043a\u0438 9.18. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e\u043c\u0443 \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044e \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 named \u0432 \u0441\u043b\u0443\u0447\u0430\u0435, \u0435\u0441\u043b\u0438 TLS-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043a \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0443 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 HTTP \u0431\u0443\u0434\u0435\u0442 \u0434\u043e\u0441\u0440\u043e\u0447\u043d\u043e \u043e\u0431\u043e\u0440\u0432\u0430\u043d\u043e. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 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