{"id":72754,"date":"2020-03-04T02:42:36","date_gmt":"2020-03-03T23:42:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/massovyj-otzyv-sertifikatov-lets-encrypt"},"modified":"2020-03-04T02:42:36","modified_gmt":"2020-03-03T23:42:36","slug":"massovyj-otzyv-sertifikatov-lets-encrypt","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/massovyj-otzyv-sertifikatov-lets-encrypt","title":{"rendered":"Massavt \u00e5terkallande av Let's Encrypt-certifikat","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Den ideella certifieringsmyndigheten Let's Encrypt, som kontrolleras av samh\u00e4llet och erbjuder certifikat kostnadsfritt till alla som vill ha det, <noindex><a rel=\"nofollow\" href=\"https:\/\/community.letsencrypt.org\/t\/revoking-certain-certificates-on-march-4\/114864\">har varnat<\/a><\/noindex> Om den kommande \u00e5terkallelsen av m\u00e5nga tidigare utf\u00e4rdade TLS\/SSL-certifikat. Av 116 miljoner nuvarande certifikat kommer lite mer \u00e4n 3 miljoner (2,6%) fr\u00e5n Let&#8217;s Encrypt att \u00e5terkallas, varav cirka 1 miljon \u00e4r dubbletter kopplade till en dom\u00e4n (felet drabbade huvudsakligen mycket ofta uppdaterade certifikat, vilket resulterade i s\u00e5 m\u00e5nga dubbletter). \u00c5terkallelsen \u00e4r planerad till den 4 mars (exakt tid \u00e4r \u00e4nnu inte fastst\u00e4lld, men \u00e5terkallelsen kommer inte att genomf\u00f6ras f\u00f6re klockan 03:00 MSK).<\/p>\n<p>Behovet av \u00e5terkallande beror p\u00e5 den identifierade <noindex><a rel=\"nofollow\" href=\"https:\/\/community.letsencrypt.org\/t\/2020-02-29-caa-rechecking-bug\/114591\">felet<\/a><\/noindex>. Problemet har f\u00f6rekommit sedan den 25 juli 2019 och p\u00e5verkar systemet f\u00f6r kontroll av CAA-poster i DNS. CAA-posten (<noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc6844\">RFC-6844<\/a><\/noindex>, Certificate Authority Authorization) ger dom\u00e4n\u00e4garen m\u00f6jlighet att tydligt definiera vilken certifikatutf\u00e4rdande myndighet som f\u00e5r generera certifikat f\u00f6r den angivna dom\u00e4nen. Om den certifikatutf\u00e4rdande myndigheten inte anges i CAA-posterna \u00e4r den skyldig att blockera utf\u00e4rdandet av certifikat f\u00f6r den aktuella dom\u00e4nen och informera dom\u00e4n\u00e4garen om f\u00f6rs\u00f6k till kompromise. I de flesta fall beg\u00e4rs certifikatet omedelbart efter att CAA-kontrollen har genomf\u00f6rts, men resultatet av kontrollen anses giltigt i ytterligare 30 dagar. Reglerna f\u00f6reskriver ocks\u00e5 att en ny kontroll ska g\u00f6ras senast 8 timmar innan ett nytt certifikat utf\u00e4rdas (d.v.s. om det har g\u00e5tt 8 timmar fr\u00e5n den senaste kontrollen n\u00e4r en beg\u00e4ran om ett nytt certifikat g\u00f6rs, kr\u00e4vs en ny kontroll).<\/p>\n<p>Felet uppst\u00e5r om certifikatf\u00f6rfr\u00e5gan omfattar flera dom\u00e4nnamn, f\u00f6r vilka en CAA-postkontroll kr\u00e4vs. Problemet med felet \u00e4r att vid den efterf\u00f6ljande kontrollerna ist\u00e4llet f\u00f6r att validera alla dom\u00e4ner, genomf\u00f6rdes en omkontroll av endast en av dom\u00e4nerna i listan (om det fanns N dom\u00e4ner i f\u00f6rfr\u00e5gan, ist\u00e4llet f\u00f6r N olika kontroller, kontrollerades en dom\u00e4n N g\u00e5nger). Ingen omkontroll genomf\u00f6rdes f\u00f6r de \u00f6vriga dom\u00e4nerna och vid beslutet anv\u00e4ndes data fr\u00e5n den f\u00f6rsta kontrollen (det vill s\u00e4ga data som var upp till 30 dagar gamla). Som ett resultat kunde Let&#8217;s Encrypt under 30 dagar efter den f\u00f6rsta kontrollen utf\u00e4rda ett certifikat, \u00e4ven om v\u00e4rdet av CAA-posten hade \u00e4ndrats och Let&#8217;s Encrypt hade tagits bort fr\u00e5n listan \u00f6ver giltiga certifikatutf\u00e4rdare.<\/p>\n<p>Anv\u00e4ndare som drabbats av problemet har f\u00e5tt ett meddelande via e-post, om kontaktuppgifter angavs vid erh\u00e5llande av certifikatet. Du kan kontrollera dina certifikat genom att ladda upp <noindex><a rel=\"nofollow\" href=\"https:\/\/d4twhgtvn0ff5.cloudfront.net\/caa-rechecking-incident-affected-serials.txt.gz\">listan<\/a><\/noindex> serienummer av \u00e5terkallade certifikat eller anv\u00e4nda <noindex><a rel=\"nofollow\" href=\"https:\/\/unboundtest.com\/caaproblem.html\">online-tj\u00e4nsten<\/a><\/noindex> (den \u00e4r hostad p\u00e5 IP-adressen, <noindex><a rel=\"nofollow\" href=\"https:\/\/isitblockedinrussia.com\/?host=unboundtest.com\">blockerad<\/a><\/noindex> av Roskomnadzor i Ryssland). Du kan ta reda p\u00e5 serienumret f\u00f6r certifikatet f\u00f6r den \u00f6nskade dom\u00e4nen med kommandot:<\/p>\n<p>   openssl s_client -connect example.com:443 -showcerts \/dev\/null \\<br \/>\n     | openssl x509 -text -noout | grep -A 1 Serial\\ Number | tr -d :<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52472\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0435\u043a\u043e\u043c\u043c\u0435\u0440\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0438\u0439 \u0446\u0435\u043d\u0442\u0440 Let&#8217;s Encrypt, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u043c \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u044b \u0431\u0435\u0437\u0432\u043e\u0437\u043c\u0435\u0437\u0434\u043d\u043e \u0432\u0441\u0435\u043c \u0436\u0435\u043b\u0430\u044e\u0449\u0438\u043c, \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0434\u0438\u043b \u043e \u043f\u0440\u0435\u0434\u0441\u0442\u043e\u044f\u0449\u0435\u043c \u043e\u0442\u0437\u044b\u0432\u0435 \u043c\u043d\u043e\u0433\u0438\u0445 \u0440\u0430\u043d\u0435\u0435 \u0432\u044b\u0434\u0430\u043d\u043d\u044b\u0445 TLS\/SSL \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432. \u0418\u0437 116 \u043c\u043b\u043d \u043d\u044b\u043d\u0435 \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 Let&#8217;s Encrypt \u0431\u0443\u0434\u0435\u0442 \u043e\u0442\u043e\u0437\u0432\u0430\u043d\u043e \u0447\u0443\u0442\u044c \u0431\u043e\u043b\u044c\u0448\u0435 3 \u043c\u043b\u043d (2.6%), \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e 1 \u043c\u043b\u043d \u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0434\u0443\u0431\u043b\u0438\u043a\u0430\u0442\u0430\u043c\u0438, \u043f\u0440\u0438\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u043c\u0438 \u043a \u043e\u0434\u043d\u043e\u043c\u0443 \u0434\u043e\u043c\u0435\u043d\u0443 (\u043e\u0448\u0438\u0431\u043a\u0430 \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c \u0437\u0430\u0442\u0440\u043e\u043d\u0443\u043b\u0430 \u043e\u0447\u0435\u043d\u044c \u0447\u0430\u0441\u0442\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u0435\u043c\u044b\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-72754","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0435\u043a\u043e\u043c\u043c\u0435\u0440\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0438\u0439 \u0446\u0435\u043d\u0442\u0440 Let&#039;s Encrypt, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u043c \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 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\u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 Let&amp;apos;s Encrypt | ProHoster","og:description":"\u041d\u0435\u043a\u043e\u043c\u043c\u0435\u0440\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0438\u0439 \u0446\u0435\u043d\u0442\u0440 Let's Encrypt, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u043c \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u044b \u0431\u0435\u0437\u0432\u043e\u0437\u043c\u0435\u0437\u0434\u043d\u043e \u0432\u0441\u0435\u043c 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