{"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\/nl\/blog\/news\/obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-uyazvimostej","title":{"rendered":"Update van OpenSSL 1.1.1k met oplossing voor twee ernstige kwetsbaarheden","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Er is een correctieversie van de cryptografische bibliotheek OpenSSL 1.1.1k beschikbaar, waarin twee kwetsbaarheden zijn verholpen die een hoog risico met zich meebrachten:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-3450 \u2014 de mogelijkheid om de certificaatvalidatie van de certificeringsinstantie te omzeilen wanneer de vlag X509_V_FLAG_X509_STRICT is ingeschakeld, die standaard is uitgeschakeld en wordt toegepast voor extra validatie van certificaten in de keten. Het probleem is ontstaan in de nieuwe validatie die is ge\u00efmplementeerd in OpenSSL 1.1.1h, die het gebruik van certificaten in de keten verbiedt als zij expliciet codeparameter van de elliptische kromme bevatten.\n<p>Door een fout in de code overschreef de nieuwe validatie het resultaat van de eerder uitgevoerde validatie van het certificaat van de certificeringsinstantie. Als gevolg hiervan werden certificaten die waren ondertekend met een zelfondertekend certificaat, dat niet met de certificeringsinstantie was verbonden via een vertrouwensketen, behandeld als volledig betrouwbaar. De kwetsbaarheid doet zich niet voor als de parameter 'purpose' is ingesteld, die standaard wordt gebruikt in de validatieprocedures voor client- en servercertificaten in libssl (gebruikt voor TLS).      <\/p>\n<li class=\"l\"> CVE-2021-3449 \u2014 de mogelijkheid om een crash te veroorzaken <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/nl\/server\/dts-los-angeles\/\"   title=\"de server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3686\">de server<\/a> TLS door het verzenden van een speciaal vormgegeven ClientHello-bericht door de client. Het probleem is gerelateerd aan het dereferencen van een NULL-pointer in de implementatie van de signature_algorithms-extensie. Het probleem manifesteert zich alleen op <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/nl\/server\/dts-gdansk\/\"   title=\"servers\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4513\">servers<\/a> met ondersteuning voor TLSv1.2 en de mogelijkheid om de verbinding opnieuw te onderhandelen (standaard ingeschakeld).      <\/ul>\n<p>Bron: <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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de mogelijkheid om te omzeilen.","canonical_url":"https:\/\/prohoster.info\/nl\/blog\/news\/obnovlenie-openssl-1-1-1k-s-ustraneniem-dvuh-opasnyh-uyazvimostej","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"nl_NL","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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