{"id":99578,"date":"2021-03-26T04:22:43","date_gmt":"2021-03-26T02:22:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-uyazvimostej"},"modified":"2021-03-26T04:22:43","modified_gmt":"2021-03-26T02:22:43","slug":"obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-uyazvimostej","title":{"rendered":"Aktualiz\u00e1cia OpenSSL 1.1.1k s odstr\u00e1nen\u00edm dvoch kritick\u00fdch zranite\u013enost\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dostupn\u00e1 je oprava kryptografickej kni\u017enice OpenSSL 1.1.1k, ktor\u00e1 odstra\u0148uje dve zranite\u013enosti s vysokou \u00farov\u0148ou nebezpe\u010denstva:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-3450 \u2014 mo\u017enos\u0165 ob\u00eds\u0165 overenie certifik\u00e1tu certifika\u010dnej autority pri zapnut\u00ed flagu X509_V_FLAG_X509_STRICT, ktor\u00fd je predvolen\u00fd vypnut\u00fd a pou\u017e\u00edva sa na dodato\u010dn\u00e9 overenie pr\u00edtomnosti certifik\u00e1tov v re\u0165azci. Probl\u00e9m bol zaveden\u00fd v novej kontrole, ktor\u00e1 sa objavila v OpenSSL 1.1.1h, a zakazuje pou\u017e\u00edvanie certifik\u00e1tov v re\u0165azci, v ktor\u00fdch s\u00fa explicitne zak\u00f3dovan\u00e9 parametre eliptickej krivky.\n<p>V d\u00f4sledku chyby v k\u00f3de nov\u00e1 kontrola prepisovala v\u00fdsledok predt\u00fdm vykonanej kontroly spr\u00e1vnosti certifik\u00e1tu certifika\u010dnej autority. V\u00fdsledkom bolo, \u017ee certifik\u00e1ty vydan\u00e9 samopodp\u00edsan\u00fdm certifik\u00e1tom, ktor\u00fd nie je spojen\u00fd s re\u0165azcom d\u00f4very certifika\u010dnej autority, sa spracov\u00e1vali ako \u00faplne d\u00f4veryhodn\u00e9. Zranite\u013enos\u0165 sa neprejavuje pri nastaven\u00ed parametra \u201epurpose\u201c, ktor\u00fd je predvolene nastaven\u00fd v proced\u00farach overovania klientskych a serverov\u00fdch certifik\u00e1tov v libssl (pou\u017e\u00edva sa pre TLS).      <\/p>\n<li class=\"l\"> CVE-2021-3449 \u2014 mo\u017enos\u0165 vyvolania p\u00e1du <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-los-angeles\/\"   title=\"servera\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3686\">servera<\/a> TLS prostredn\u00edctvom poslania \u0161peci\u00e1lne sformulovanej spr\u00e1vy ClientHello klientom. Probl\u00e9m s\u00favis\u00ed s dereferenciou NULL ukazovate\u013ea v implement\u00e1cii roz\u0161\u00edrenia signature_algorithms. Probl\u00e9m sa prejavuje iba na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-gdansk\/\"   title=\"serveroch\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4513\">serveroch<\/a> s podporou TLSv1.2 a povolen\u00edm op\u00e4tovn\u00e9ho uzatvorenia spojenia (predvolene zapnut\u00e9).      <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54833\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 OpenSSL 1.1.1k , \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438: CVE-2021-3450 &#8212; \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043e\u0431\u0445\u043e\u0434\u0430 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0435\u0433\u043e \u0446\u0435\u043d\u0442\u0440\u0430 \u043f\u0440\u0438 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0438 \u0444\u043b\u0430\u0433\u0430 X509_V_FLAG_X509_STRICT, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0442\u043a\u043b\u044e\u0447\u0451\u043d \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 \u0432 \u0446\u0435\u043f\u043e\u0447\u043a\u0435. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u043d\u0435\u0441\u0435\u043d\u0430 \u0432 \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0435\u0439\u0441\u044f \u0432 OpenSSL 1.1.1h \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043d\u043e\u0432\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438, \u0437\u0430\u043f\u0440\u0435\u0449\u0430\u044e\u0449\u0435\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 [&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-99578","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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mo\u017enos\u0165 obch\u00e1dzania.","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-uyazvimostej","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","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 OpenSSL 1.1.1k \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0434\u0432\u0443\u0445 \u043e\u043f\u0430\u0441\u043d\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 | ProHoster","og:description":"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 OpenSSL 1.1.1k , \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438: CVE-2021-3450 - 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