{"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\/cs\/blog\/news\/obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-uyazvimostej","title":{"rendered":"Aktualizace OpenSSL 1.1.1k opravuj\u00edc\u00ed dv\u011b kritick\u00e9 zranitelnosti.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byl vyd\u00e1n opravn\u00fd release kryptografick\u00e9 knihovny OpenSSL 1.1.1k, ve kter\u00e9m byly odstran\u011bny dv\u011b zranitelnosti, kter\u00fdm byla p\u0159i\u0159azena vysok\u00e1 \u00farove\u0148 nebezpe\u010d\u00ed:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-3450 &#8212; mo\u017enost obch\u00e1zen\u00ed kontroly certifik\u00e1tu certifika\u010dn\u00ed autority p\u0159i aktivaci p\u0159\u00edznaku X509_V_FLAG_X509_STRICT, kter\u00fd je ve v\u00fdchoz\u00edm nastaven\u00ed zak\u00e1z\u00e1n a pou\u017e\u00edv\u00e1 se pro dodate\u010dnou kontrolu p\u0159\u00edtomnosti certifik\u00e1t\u016f v \u0159et\u011bzci. Probl\u00e9m byl zaveden ve verzi OpenSSL 1.1.1h, kde byla implementov\u00e1na nov\u00e1 kontrola, kter\u00e1 zakazuje pou\u017eit\u00ed certifik\u00e1t\u016f v \u0159et\u011bzci, ve kter\u00fdch jsou explicitn\u011b zak\u00f3dov\u00e1ny parametry eliptick\u00e9 k\u0159ivky.\n<p>Kv\u016fli chyb\u011b v k\u00f3du nov\u00e1 kontrola p\u0159episovala v\u00fdsledek p\u0159edchoz\u00ed kontroly platnosti certifik\u00e1tu certifika\u010dn\u00ed autority. V d\u016fsledku toho byly certifik\u00e1ty podepsan\u00e9 samovyroben\u00fdm certifik\u00e1tem, kter\u00fd nebyl v \u0159et\u011bzci d\u016fv\u011bry s certifika\u010dn\u00ed autoritou, zpracov\u00e1ny jako pln\u011b d\u016fv\u011bryhodn\u00e9. Zranitelnost se neprojevuje v p\u0159\u00edpad\u011b nastaven\u00ed parametru &#171;purpose&#187;, kter\u00fd je ve v\u00fdchoz\u00edm nastaven\u00ed nastaven v procedur\u00e1ch kontroly klientsk\u00fdch a serverov\u00fdch certifik\u00e1t\u016f v libssl (pou\u017e\u00edv\u00e1 se pro TLS).      <\/p>\n<li class=\"l\"> CVE-2021-3449 &#8212; mo\u017enost zp\u016fsoben\u00ed p\u00e1du <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-los-angeles\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3686\">serveru<\/a> TLS prost\u0159ednictv\u00edm odesl\u00e1n\u00ed speci\u00e1ln\u011b upraven\u00e9 zpr\u00e1vy ClientHello klientem. Probl\u00e9m souvis\u00ed s dereferencov\u00e1n\u00edm NULL ukazatele v implementaci roz\u0161\u00ed\u0159en\u00ed signature_algorithms. Probl\u00e9m se projevuje pouze na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-gdansk\/\"   title=\"serverech\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4513\">serverech<\/a> s podporou TLSv1.2 a povolen\u00edm op\u011btovn\u00e9ho vyjedn\u00e1v\u00e1n\u00ed spojen\u00ed (v\u00fdchoz\u00ed nastaven\u00ed je zapnuto).      <\/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 5.0.3 - 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mo\u017enost obej\u00edt.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-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 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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