{"id":103567,"date":"2022-03-19T09:36:48","date_gmt":"2022-03-19T07:36:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-dns-servera-bind-9-11-37-9-16-27-i-9-18-1-c-ustraneniem-4-uyazvimostej"},"modified":"2022-03-19T09:36:48","modified_gmt":"2022-03-19T07:36:48","slug":"obnovlenie-dns-servera-bind-9-11-37-9-16-27-i-9-18-1-c-ustraneniem-4-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-dns-servera-bind-9-11-37-9-16-27-i-9-18-1-c-ustraneniem-4-uyazvimostej","title":{"rendered":"Aktualizace DNS serveru BIND 9.11.37, 9.16.27 a 9.18.1 s odstran\u011bn\u00edm 4 zranitelnost\u00ed.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byly zve\u0159ejn\u011bny opravn\u00e9 aktualizace stabiln\u00edch verz\u00ed DNS serveru BIND 9.11.37, 9.16.27 a 9.18.1, kter\u00e9 odstranily \u010dty\u0159i zranitelnosti:    <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-25220 \u2014 mo\u017enost vkl\u00e1d\u00e1n\u00ed nespr\u00e1vn\u00fdch NS z\u00e1znam\u016f do DNS serveru (otravov\u00e1n\u00ed cache), co\u017e m\u016f\u017ee v\u00e9st k tomu, \u017ee se obr\u00e1t\u00edme na nespr\u00e1vn\u00e9 DNS servery, kter\u00e9 poskytuj\u00ed fale\u0161n\u00e9 informace. Probl\u00e9m se projevuje v resolvers pracuj\u00edc\u00edch v re\u017eimech \u201eforward first\u201c (v\u00fdchoz\u00ed) nebo \u201eforward only\u201c, v p\u0159\u00edpad\u011b kompromitace jednoho z forwarder\u016f (NS z\u00e1znamy z\u00edskan\u00e9 od forwarder\u016f se usazuj\u00ed v cache a n\u00e1sledn\u011b mohou v\u00e9st k tomu, \u017ee se p\u0159i prov\u00e1d\u011bn\u00ed rekurzivn\u00edch dotaz\u016f obr\u00e1t\u00edme na nespr\u00e1vn\u00fd DNS server).\n<li class=\"l\"> CVE-2022-0396 \u2014 DoS (neomezen\u00e9 zaseknut\u00ed spojen\u00ed ve stavu CLOSE_WAIT), iniciovan\u00e9 zasl\u00e1n\u00edm speci\u00e1ln\u011b zformovan\u00fdch TCP paket\u016f. Probl\u00e9m se projevuje pouze p\u0159i zapnut\u00ed nastaven\u00ed keep-response-order, kter\u00e9 se ve v\u00fdchoz\u00edm stavu nepou\u017e\u00edv\u00e1, a tak\u00e9 p\u0159i zad\u00e1n\u00ed mo\u017enosti keep-response-order v ACL.\n<li class=\"l\"> CVE-2022-0635 \u2014 mo\u017enost ne\u010dekan\u00e9ho zastaven\u00ed procesu named prost\u0159ednictv\u00edm zas\u00edl\u00e1n\u00ed ur\u010dit\u00fdch dotaz\u016f na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-shicago\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2907\">serveru<\/a>. Probl\u00e9m se projevuje p\u0159i pou\u017eit\u00ed mezipam\u011bti validovan\u00fdch DNSSEC dotaz\u016f (DNSSEC-Validated Cache), kter\u00e1 je ve verzi 9.18 zapnuta ve v\u00fdchoz\u00edm nastaven\u00ed (nastaven\u00ed dnssec-validation a synth-from-dnssec).\n<li class=\"l\"> CVE-2022-0667 \u2014 mo\u017enost ne\u010dekan\u00e9ho zastaven\u00ed procesu named p\u0159i zpracov\u00e1n\u00ed odlo\u017een\u00fdch DS dotaz\u016f. Probl\u00e9m se projevuje pouze ve v\u011btvi BIND 9.18 a je zp\u016fsoben chybou, kter\u00e1 se vyskytla p\u0159i p\u0159epracov\u00e1v\u00e1n\u00ed klientsk\u00e9ho k\u00f3du pro rekurzivn\u00ed zpracov\u00e1n\u00ed dotaz\u016f.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56879\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 9.11.37, 9.16.27 \u0438 9.18.1, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0447\u0435\u0442\u044b\u0440\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2021-25220 &#8212; \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u0445 NS-\u0437\u0430\u043f\u0438\u0441\u0435\u0439 \u0432 \u043a\u044d\u0448 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 (\u043e\u0442\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043a\u044d\u0448\u0430), \u0447\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a \u043d\u0435\u0432\u0435\u0440\u043d\u044b\u043c DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430\u043c, \u043e\u0442\u0434\u0430\u044e\u0449\u0438\u043c \u043b\u043e\u0436\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0440\u0435\u0437\u043e\u043b\u0432\u0435\u0440\u0430\u0445, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0445 \u0432 \u0440\u0435\u0436\u0438\u043c\u0430\u0445 &#171;forward first&#187; (\u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e) \u0438\u043b\u0438 &#171;forward only&#187;, \u0432 \u0443\u0441\u043b\u043e\u0432\u0438\u0438 \u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0430\u0446\u0438\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-103567","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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mo\u017enost vlo\u017een\u00ed nespr\u00e1vn\u00fdch.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-dns-servera-bind-9-11-37-9-16-27-i-9-18-1-c-ustraneniem-4-uyazvimostej","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 BIND 9.11.37, 9.16.27 \u0438 9.18.1 c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 4 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 | ProHoster","og:description":"\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 9.11.37, 9.16.27 \u0438 9.18.1, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0447\u0435\u0442\u044b\u0440\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2021-25220 - 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