{"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\/es\/blog\/news\/massovyj-otzyv-sertifikatov-lets-encrypt","title":{"rendered":"Revocaci\u00f3n masiva de certificados Let's Encrypt.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Let's Encrypt es una autoridad certificadora sin fines de lucro, gestionada por la comunidad, que ofrece certificados de forma gratuita a todos los que lo deseen. <noindex><a rel=\"nofollow\" href=\"https:\/\/community.letsencrypt.org\/t\/revoking-certain-certificates-on-march-4\/114864\">advirti\u00f3<\/a><\/noindex> sobre la pr\u00f3xima revocaci\u00f3n de muchos certificados TLS\/SSL emitidos anteriormente. De los 116 millones de certificados activos de Let's Encrypt, se revocar\u00e1 un poco m\u00e1s de 3 millones (2.6%), de los cuales aproximadamente 1 mill\u00f3n son duplicados asociados a un solo dominio (el error afect\u00f3 principalmente a los certificados que se actualizan con frecuencia, por lo que hay tantos duplicados). La revocaci\u00f3n est\u00e1 programada para el 4 de marzo (la hora exacta a\u00fan no se ha determinado, pero la revocaci\u00f3n no se llevar\u00e1 a cabo antes de las 3 de la ma\u00f1ana hora de Mosc\u00fa).<\/p>\n<p>La necesidad de revocaci\u00f3n se debe a un error detectado el 29 de febrero <noindex><a rel=\"nofollow\" href=\"https:\/\/community.letsencrypt.org\/t\/2020-02-29-caa-rechecking-bug\/114591\">error<\/a><\/noindex>. El problema se manifiesta desde el 25 de julio de 2019 y afecta al sistema de verificaci\u00f3n de registros CAA en DNS. El registro CAA (<noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc6844\">RFC-6844<\/a><\/noindex>, Authorization de Autoridad Certificadora) permite al propietario del dominio definir expl\u00edcitamente la autoridad certificadora a trav\u00e9s de la cual se pueden generar certificados para el dominio especificado. Si la autoridad certificadora no est\u00e1 enumerada en los registros CAA, debe bloquear la emisi\u00f3n de certificados para ese dominio e informar al propietario del dominio sobre los intentos de compromiso. En la mayor\u00eda de los casos, se solicita el certificado inmediatamente despu\u00e9s de pasar la verificaci\u00f3n CAA, pero el resultado de la verificaci\u00f3n se considera v\u00e1lido durante otros 30 d\u00edas. Las reglas tambi\u00e9n exigen realizar una nueva verificaci\u00f3n no m\u00e1s de 8 horas antes de la emisi\u00f3n de un nuevo certificado (es decir, si al solicitar un nuevo certificado han pasado 8 horas desde la \u00faltima verificaci\u00f3n, se requiere una nueva verificaci\u00f3n).<\/p>\n<p>El error se presenta si la solicitud del certificado abarca varios nombres de dominio, para cada uno de los cuales se requiere la verificaci\u00f3n del registro CAA. La esencia del error radica en que, durante la verificaci\u00f3n repetida, en lugar de validar todos los dominios, solo se verificaba uno de la lista (si en la solicitud hab\u00eda N dominios, en lugar de N verificaciones diferentes, un dominio se verificaba N veces). Para los dem\u00e1s dominios, no se realizaba la verificaci\u00f3n repetida y al tomar la decisi\u00f3n se utilizaban los datos de la primera verificaci\u00f3n (es decir, se utilizaban datos de hasta 30 d\u00edas de antig\u00fcedad). Como consecuencia, durante 30 d\u00edas despu\u00e9s de la primera verificaci\u00f3n, Let's Encrypt podr\u00eda haber emitido un certificado, incluso si el valor del registro CAA hab\u00eda cambiado y Let's Encrypt hab\u00eda sido eliminado de la lista de autoridades de certificaci\u00f3n permitidas.<\/p>\n<p>Se ha enviado una notificaci\u00f3n por correo electr\u00f3nico a los usuarios afectados, si se completaron los datos de contacto al recibir el certificado. Puede verificar sus certificados subiendo <noindex><a rel=\"nofollow\" href=\"https:\/\/d4twhgtvn0ff5.cloudfront.net\/caa-rechecking-incident-affected-serials.txt.gz\">lista<\/a><\/noindex> los n\u00fameros de serie de los certificados revocados o utilizando <noindex><a rel=\"nofollow\" href=\"https:\/\/unboundtest.com\/caaproblem.html\">el servicio en l\u00ednea<\/a><\/noindex> (ubicado en la direcci\u00f3n IP, <noindex><a rel=\"nofollow\" href=\"https:\/\/isitblockedinrussia.com\/?host=unboundtest.com\">bloqueada<\/a><\/noindex> por Roskomnadzor en la Federaci\u00f3n Rusa). Puede conocer el n\u00famero de serie del certificado para el dominio de inter\u00e9s utilizando el siguiente comando:<\/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>Fuente: <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 5.0.2 - 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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