{"id":184233,"date":"2026-11-12T11:41:15","date_gmt":"2026-11-12T09:41:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/udostoveryayushhij-czentr-emudhra-otozval-eshhyo-8-promezhutochnyh-kornevyh-sertifikatov"},"modified":"2026-11-12T11:41:21","modified_gmt":"2026-11-12T09:41:21","slug":"emudhra-certificate-authority-revokes-8-more-intermediate-root-certificates","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/emudhra-certificate-authority-revokes-8-more-intermediate-root-certificates","title":{"rendered":"Certifika\u010dn\u00ed centrum eMudhra odvolalo dal\u0161\u00edch 8 meziproduktov\u00fdch ko\u0159enov\u00fdch certifik\u00e1t\u016f","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Spole\u010dnost eMudhra zve\u0159ejnila dal\u0161\u00ed podrobnosti t\u00fdkaj\u00edc\u00ed se incidentu, p\u0159i kter\u00e9m bylo osmi ko\u0159enov\u00fdm certifik\u00e1t\u016fm certifika\u010dn\u00ed autority snadno odhaliteln\u00fd soukrom\u00fd kl\u00ed\u010d s pouh\u00fdm 1 bajtem entropie nam\u00edsto 48. Krom\u011b p\u016fvodn\u011b identifikovan\u00fdch probl\u00e9mov\u00fdch meziproduk\u010dn\u00edch ko\u0159enov\u00fdch certifik\u00e1t\u016f bylo zpraveno o dal\u0161\u00edm sta\u017een\u00ed 8 certifik\u00e1t\u016f, av\u0161ak nikoli z d\u016fvodu probl\u00e9m\u016f s entropi\u00ed. Anal\u00fdza uk\u00e1zala, \u017ee zdrojem probl\u00e9m\u016f s entropi\u00ed byl vlastnoru\u010dn\u011b vytvo\u0159en\u00fd Python skript, kter\u00fd se pou\u017e\u00edval k p\u0159enosu soukrom\u00fdch kl\u00ed\u010d\u016f mezi hardwarov\u00fdmi \u00falo\u017ei\u0161ti kl\u00ed\u010d\u016f (HSM) r\u016fzn\u00fdch v\u00fdrobc\u016f. P\u0159enos kl\u00ed\u010d\u016f byl vyvol\u00e1n zpo\u017ed\u011bn\u00edm dod\u00e1vek vylep\u0161en\u00fdch model\u016f HSM, kter\u00e9 spl\u0148uj\u00ed nov\u00e9 po\u017eadavky na certifika\u010dn\u00ed autority. <\/p>\n

Z d\u016fvodu chyby byl velikost soukrom\u00fdch kl\u00ed\u010d\u016f ECDSA zkr\u00e1cena na 1 bajt. Krom\u011b toho p\u0159i p\u0159enosu kl\u00ed\u010d\u016f mezi HSM skript zpracov\u00e1val soukrom\u00e9 kl\u00ed\u010de v nezabezpe\u010den\u00e9 opera\u010dn\u00ed pam\u011bti po\u010d\u00edta\u010de, na kter\u00e9m byl spu\u0161t\u011bn, zat\u00edmco operace se soukrom\u00fdmi kl\u00ed\u010di maj\u00ed b\u00fdt prov\u00e1d\u011bny pouze uvnit\u0159 HSM. Protokoly HSM potvrdily, \u017ee hardwarov\u00e1 \u00falo\u017ei\u0161t\u011b fungovala spr\u00e1vn\u011b a probl\u00e9m byl zp\u016fsoben pou\u017eit\u00edm vlastnoru\u010dn\u011b vytvo\u0159en\u00e9ho skriptu. <\/p>\n

Krom\u011b kl\u00ed\u010d\u016f ECDSA byl skript pou\u017eit tak\u00e9 k p\u0159enosu 8 kl\u00ed\u010d\u016f RSA-4096, u kter\u00fdch nenastaly probl\u00e9my s entropi\u00ed, ale zpracov\u00e1n\u00ed kl\u00ed\u010d\u016f v b\u011b\u017en\u00e9 pam\u011bti naru\u0161uje bezpe\u010dnostn\u00ed po\u017eadavky kladen\u00e9 na certifika\u010dn\u00ed autority, proto byly certifik\u00e1ty RSA tak\u00e9 nyn\u00ed sta\u017eeny.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f eMudhra \u0440\u0430\u0441\u043a\u0440\u044b\u043b\u0430 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0434\u0435\u0442\u0430\u043b\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0435 \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u043e\u043c, \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0443 \u0432\u043e\u0441\u044c\u043c\u0438 \u043a\u043e\u0440\u043d\u0435\u0432\u044b\u0445 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0435\u0433\u043e \u0446\u0435\u043d\u0442\u0440\u0430 \u043e\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u043b\u0435\u0433\u043a\u043e \u043f\u043e\u0434\u0431\u0438\u0440\u0430\u0435\u043c\u044b\u0435 \u0437\u0430\u043a\u0440\u044b\u0442\u044b\u0435 \u043a\u043b\u044e\u0447\u0438, 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\u0447\u0442\u043e \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u044d\u043d\u0442\u0440\u043e\u043f\u0438\u0435\u0439 \u0441\u0442\u0430\u043b […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184233","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\n","aioseo_head_json":{"title":"\ud83e\udd47Certifika\u010dn\u00ed autorita eMudhra st\u00e1hla dal\u0161\u00edch 8 meziproduk\u010dn\u00edch ko\u0159enov\u00fdch certifik\u00e1t\u016f | ProHoster","description":"Spole\u010dnost eMudhra zve\u0159ejnila 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