{"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\/hu\/blog\/news\/massovyj-otzyv-sertifikatov-lets-encrypt","title":{"rendered":"A Let's Encrypt tan\u00fas\u00edtv\u00e1nyok t\u00f6meges visszah\u00edv\u00e1sa","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A k\u00f6z\u00f6ss\u00e9g \u00e1ltal ir\u00e1ny\u00edtott Let’s Encrypt nem kereskedelmi tan\u00fas\u00edtv\u00e1nykibocs\u00e1t\u00f3 k\u00f6zpont, amely ingyenesen biztos\u00edt tan\u00fas\u00edtv\u00e1nyokat mindenkinek, aki ig\u00e9nyli. figyelmeztette<\/a><\/noindex> a sok kor\u00e1bban kibocs\u00e1tott TLS\/SSL tan\u00fas\u00edtv\u00e1ny visszavon\u00e1s\u00e1r\u00f3l. A 116 milli\u00f3 jelenleg \u00e9rv\u00e9nyes Let’s Encrypt tan\u00fas\u00edtv\u00e1ny k\u00f6z\u00fcl kicsivel t\u00f6bb mint 3 milli\u00f3t (2,6%) vonnak vissza, ezek k\u00f6z\u00fcl k\u00f6r\u00fclbel\u00fcl 1 milli\u00f3 duplik\u00e1tum, amely egyetlen domainhez van rendelve (a hiba f\u0151k\u00e9nt azokat a tan\u00fas\u00edtv\u00e1nyokat \u00e9rintette, amelyeket gyakran friss\u00edtettek, \u00edgy sok a duplik\u00e1tum). A visszavon\u00e1st m\u00e1rcius 4-\u00e9re tervezik (a pontos id\u0151 m\u00e9g nincs meghat\u00e1rozva, de a visszavon\u00e1s legkor\u00e1bban hajnali 3 \u00f3rakor MSK szerint t\u00f6rt\u00e9nik).<\/p>\n

A visszah\u00edv\u00e1s sz\u00fcks\u00e9gess\u00e9g\u00e9t az febru\u00e1r 29-\u00e9n felfedezett<\/a><\/noindex>hiba indokolja. A probl\u00e9ma 2019. j\u00falius 25. \u00f3ta fenn\u00e1ll, \u00e9s a DNS-ban tal\u00e1lhat\u00f3 CAA-rekordok ellen\u0151rz\u00e9si rendszer\u00e9t \u00e9rinti. A CAA-rekord (RFC-6844<\/a><\/noindex>, Certificate Authority Authorization) lehet\u0151v\u00e9 teszi a domain tulajdonosa sz\u00e1m\u00e1ra, hogy kifejezetten meghat\u00e1rozza azt a tan\u00fas\u00edtv\u00e1nykiad\u00f3t, amelyen kereszt\u00fcl tan\u00fas\u00edtv\u00e1nyokat lehet gener\u00e1lni a megadott domainhez. Ha a tan\u00fas\u00edtv\u00e1nykiad\u00f3 nincs felsorolva a CAA-rekordokban, akkor k\u00f6teles letiltani a tan\u00fas\u00edtv\u00e1nyok kiad\u00e1s\u00e1t a megadott domainhez, \u00e9s t\u00e1j\u00e9koztatni a domain tulajdonos\u00e1t a kompromitt\u00e1l\u00e1si k\u00eds\u00e9rletekr\u0151l. A legt\u00f6bb esetben a tan\u00fas\u00edtv\u00e1nyt azonnal a CAA-ellen\u0151rz\u00e9s elv\u00e9gz\u00e9se ut\u00e1n k\u00e9rik, de az ellen\u0151rz\u00e9s eredm\u00e9nye m\u00e9g 30 napig \u00e9rv\u00e9nyes. A szab\u00e1lyok azt is el\u0151\u00edrj\u00e1k, hogy \u00faj tan\u00fas\u00edtv\u00e1ny kiad\u00e1sa el\u0151tt legfeljebb 8 \u00f3r\u00e1val ism\u00e9telt ellen\u0151rz\u00e9st kell v\u00e9gezni (teh\u00e1t ha egy \u00faj tan\u00fas\u00edtv\u00e1ny k\u00e9relmez\u00e9se el\u0151tt 8 \u00f3ra telt el az utols\u00f3 ellen\u0151rz\u00e9s \u00f3ta, sz\u00fcks\u00e9ges az ism\u00e9telt ellen\u0151rz\u00e9s).<\/p>\n

A hiba akkor jelentkezik, ha a tan\u00fas\u00edtv\u00e1nyig\u00e9nyl\u00e9s t\u00f6bb domain nevet is fel\u00f6lel, mindegyik eset\u00e9ben CAA rekord ellen\u0151rz\u00e9s sz\u00fcks\u00e9ges. A hiba l\u00e9nyege, hogy a m\u00e1sodik ellen\u0151rz\u00e9s sor\u00e1n nem minden domain valid\u00e1l\u00e1sa t\u00f6rt\u00e9nt meg, hanem csak az egyik domainr\u0151l (ha az ig\u00e9nyl\u00e9s N domain volt, N k\u00fcl\u00f6n ellen\u0151rz\u00e9s helyett egy domain N alkalommal ellen\u0151rz\u0151d\u00f6tt). A t\u00f6bbi domain eset\u00e9ben a m\u00e1sodik ellen\u0151rz\u00e9s nem zajlott le, \u00e9s a d\u00f6nt\u00e9s meghozatalakor az els\u0151 ellen\u0151rz\u00e9s adatait haszn\u00e1lt\u00e1k (azaz 30 napos adatok j\u00f6ttek el\u0151). Ennek k\u00f6vetkezm\u00e9nyek\u00e9nt a Let’s Encrypt a 30 nap sor\u00e1n a els\u0151 ellen\u0151rz\u00e9s ut\u00e1n \u00e1tn\u00e9zte a tan\u00fas\u00edtv\u00e1nyt, m\u00e9g akkor is, ha a CAA rekord \u00e9rt\u00e9ke megv\u00e1ltozott, \u00e9s a Let’s Encrypt elt\u00e1vol\u00edt\u00e1sra ker\u00fclt a megengedett tan\u00fas\u00edtv\u00e1nykibocs\u00e1t\u00f3k list\u00e1j\u00e1r\u00f3l.<\/p>\n

A probl\u00e9m\u00e1nak kitett felhaszn\u00e1l\u00f3k \u00e9rtes\u00edt\u00e9st kaptak e-mailben, ha a tan\u00fas\u00edtv\u00e1ny ig\u00e9nyl\u00e9se sor\u00e1n kit\u00f6lt\u00f6tt\u00e9k a kapcsolattart\u00e1si adatokat. A tan\u00fas\u00edtv\u00e1nyaikat a k\u00f6vetkez\u0151 linken ellen\u0151rizhetik: lista<\/a><\/noindex> visszavont tan\u00fas\u00edtv\u00e1nyok sorozatsz\u00e1mait tartalmaz\u00f3 online szolg\u00e1ltat\u00e1ssal<\/a><\/noindex> (IP-c\u00edmen el\u00e9rhet\u0151, Oroszorsz\u00e1gban a Roszkomnadzor \u00e1ltal blokkolt<\/a><\/noindex> ). Az \u00e9rdekl\u0151d\u0151 domain tan\u00fas\u00edtv\u00e1ny sorozatsz\u00e1m\u00e1t a k\u00f6vetkez\u0151 parancs seg\u00edts\u00e9g\u00e9vel lehet megtudni:<\/p>\n

openssl s_client -connect example.com:443 -showcerts \/dev\/null \\
\n | openssl x509 -text -noout | grep -A 1 Serial\\ Number | tr -d :<\/p>\n

<\/a><\/noindex><\/p>\n

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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 \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’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 […]<\/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\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A Let's Encrypt tan\u00fas\u00edtv\u00e1nyok t\u00f6meges visszavon\u00e1sa | ProHoster","description":"A Let's Encrypt egy nonprofit hiteles\u00edt\u0151 hat\u00f3s\u00e1g, amely a k\u00f6z\u00f6ss\u00e9g \u00e1ltal m\u0171k\u00f6dtetett, 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