{"id":119889,"date":"2024-09-20T21:43:01","date_gmt":"2024-09-20T19:43:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem"},"modified":"2024-09-20T21:43:01","modified_gmt":"2024-09-20T19:43:01","slug":"reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","title":{"rendered":"Vyd\u00e1n\u00ed OpenSSH 9.9 se podporou postkvantov\u00e9ho \u0161ifrovac\u00edho algoritmu ML-KEM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byl vyd\u00e1n OpenSSH 9.9, otev\u0159en\u00e1 implementace klienta a serveru pro protokoly SSH 2.0 a SFTP. Hlavn\u00ed zm\u011bny:  <\/p>\n<ul>\n<li class=\"l\"> Do ssh a sshd byla p\u0159id\u00e1na podpora hybridn\u00edho algoritmu pro v\u00fdm\u011bnu kl\u00ed\u010d\u016f \u201emlkem768x25519-sha256\u201c, odoln\u00e9ho v\u016f\u010di \u00fatok\u016fm kvantov\u00fdch po\u010d\u00edta\u010d\u016f, kter\u00fd kombinuje X25519 ECDH a algoritmus ML-KEM (CRYSTALS-Kyber), ned\u00e1vno standardizovan\u00fd N\u00e1rodn\u00edm institutem standard\u016f a technologi\u00ed USA (NIST). ML-KEM vyu\u017e\u00edv\u00e1 metody kryptografie, zalo\u017een\u00e9 na \u0159e\u0161en\u00ed probl\u00e9m\u016f teorie m\u0159\u00ed\u017eek, jejich\u017e doba \u0159e\u0161en\u00ed se neli\u0161\u00ed na b\u011b\u017en\u00fdch a kvantov\u00fdch po\u010d\u00edta\u010d\u00edch.\n<li class=\"l\"> Do konfigura\u010dn\u00edho souboru sshd_config bylo p\u0159id\u00e1no kl\u00ed\u010dov\u00e9 slovo \u201eRefuseConnection\u201c, p\u0159i jeho\u017e nastaven\u00ed sshd ukon\u010d\u00ed spojen\u00ed po prvn\u00edm pokusu o autentizaci. Do direktivy PerSourcePenalties byla p\u0159id\u00e1na t\u0159\u00edda \u201erefuseconnection\u201c, kter\u00e1 se aplikuje p\u0159i ukon\u010den\u00ed spojen\u00ed po aktivaci \u201eRefuseConnection\u201c.\n<li class=\"l\"> V klientu ssh byla ukon\u010dena podpora komprese dat p\u0159ed autentizac\u00ed, co\u017e v\u00fdrazn\u011b zvy\u0161ovalo \u00farove\u0148 \u00fatoku na SSH servery a vytv\u00e1\u0159elo rizika vyu\u017eit\u00ed nep\u0159\u00edm\u00fdch metod anal\u00fdzy informac\u00ed zas\u00edlan\u00fdch b\u011bhem autentizace. V <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-newyork\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2785\">serveru<\/a> sshd byla komprese p\u0159ed autentizac\u00ed vypnuta d\u0159\u00edve.\n<li class=\"l\"> V ssh a sshd jsou p\u0159i anal\u00fdze argument\u016f direktivy \u201eMatch\u201c vyu\u017e\u00edv\u00e1ny podobn\u00e9 pravidla pro pr\u00e1ci se \u0159et\u011bzci uzav\u0159en\u00fdmi v uvozovk\u00e1ch, kter\u00e1 podporuj\u00ed vno\u0159en\u00e9 obalen\u00ed a escaping pomoc\u00ed symbolu \u201e\\\u201c.\n<li class=\"l\"> V konfigura\u010dn\u00edm souboru ssh_config byla v direktiv\u011b \u201eInclude\u201c zaji\u0161t\u011bna podpora prom\u011bnn\u00fdch prost\u0159ed\u00ed a \u201e%\u201c-nahrazen\u00ed, stejn\u011b jako v direktiv\u011b \u201eMatch Exec\u201c.\n<li class=\"l\"> Do sshd_config byla do direktivy Match p\u0159id\u00e1na mo\u017enost \u201einvalid-user\u201c, kter\u00e1 se aktivuje p\u0159i pokusu o p\u0159ihl\u00e1\u0161en\u00ed s neplatn\u00fdm u\u017eivatelsk\u00fdm jm\u00e9nem.\n<li class=\"l\"> V ssh a sshd byla nasazena rychlej\u0161\u00ed implementace algoritmu \u201eStreamlined NTRUPrime\u201c. Pro hybridn\u00ed algoritmus pro v\u00fdm\u011bnu kl\u00ed\u010d\u016f Streamlined NTRUPrime\/X25519 byla p\u0159id\u00e1na mo\u017enost pou\u017eit\u00ed n\u00e1zvu \u201esntrup761x25519-sha512\u201c, krom\u011b specifick\u00e9ho n\u00e1zvu pro SSH \u201esntrup761x25519-sha512@openssh.com\u201c.\n<li class=\"l\"> V ssh, sshd a ssh-agent byla p\u0159id\u00e1na ochrana p\u0159ed opu\u0161t\u011bn\u00edm soukrom\u00fdch kl\u00ed\u010d\u016f v core souborech, kter\u00e1 funguje v OpenBSD, Linuxu a FreeBSD.\n<li class=\"l\"> Zpracov\u00e1n\u00ed kl\u00ed\u010d\u016f bylo p\u0159evedeno na pou\u017eit\u00ed API EVP_PKEY poskytovan\u00e9ho knihovnou libcrypto.\n<li class=\"l\"> Do sshd bylo p\u0159id\u00e1no n\u00e1hodn\u00e9 zm\u011bn\u011bn\u00ed \u010dasov\u00e9ho limitu p\u0159ipojen\u00ed (LoginGraceTime) v rozmez\u00ed 4 sekund, aby se zt\u00ed\u017eilo ur\u010den\u00ed vypr\u0161en\u00ed \u010dasov\u00e9ho limitu.\n<li class=\"l\"> Byly vy\u0159e\u0161eny probl\u00e9my se sestaven\u00edm s knihovnou Musl.  <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61899\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.9, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c SSH 2.0 \u0438 SFTP. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0412 ssh \u0438 sshd \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0433\u0438\u0431\u0440\u0438\u0434\u043d\u043e\u0433\u043e \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 \u043e\u0431\u043c\u0435\u043d\u0430 \u043a\u043b\u044e\u0447\u0430\u043c\u0438 &#171;mlkem768x25519-sha256&#187;, \u0441\u0442\u043e\u0439\u043a\u043e\u0433\u043e \u043a \u043f\u043e\u0434\u0431\u043e\u0440\u0443 \u043d\u0430 \u043a\u0432\u0430\u043d\u0442\u043e\u0432\u043e\u043c \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u0435 \u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0441\u043e\u0431\u043e\u0439 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044e \u0438\u0437 X25519 ECDH \u0438 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 ML-KEM (CRYSTALS-Kyber), \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u041d\u0430\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u043c \u0438\u043d\u0441\u0442\u0438\u0442\u0443\u0442\u043e\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 \u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0439 \u0421\u0428\u0410 [&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-119889","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.9, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 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