{"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\/sk\/blog\/news\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","title":{"rendered":"Vydanie OpenSSH 9.9 s podporou algoritmu postkvantov\u00e9ho \u0161ifrovania ML-KEM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bol vydan\u00fd OpenSSH 9.9, otvoren\u00e1 implement\u00e1cia klienta a servera pre pr\u00e1cu s protokolmi SSH 2.0 a SFTP. Hlavn\u00e9 zmeny:  <\/p>\n<ul>\n<li class=\"l\"> V ssh a sshd bola pridan\u00e1 podpora hybridn\u00e9ho algoritmu v\u00fdmeny k\u013e\u00fa\u010dov \u201emlkem768x25519-sha256\u201c, odoln\u00e9ho vo\u010di \u00fatokom kvantov\u00fdch po\u010d\u00edta\u010dov, ktor\u00fd je kombin\u00e1ciou X25519 ECDH a algoritmu ML-KEM (CRYSTALS-Kyber), ned\u00e1vno \u0161tandardizovan\u00e9ho N\u00e1rodn\u00fdm \u00faradom pre \u0161tandardy a technol\u00f3gie USA (NIST). ML-KEM vyu\u017e\u00edva met\u00f3dy kryptografie zalo\u017een\u00e9 na rie\u0161en\u00ed \u00faloh te\u00f3rie mrie\u017eok, pri\u010dom \u010das na ich vyrie\u0161enie sa nel\u00ed\u0161i na be\u017en\u00fdch a kvantov\u00fdch po\u010d\u00edta\u010doch.\n<li class=\"l\"> Do konfigura\u010dn\u00e9ho s\u00faboru sshd_config bolo pridan\u00e9 k\u013e\u00fa\u010dov\u00e9 slovo \u201eRefuseConnection\u201c, pri jeho\u017e nastaven\u00ed sshd ukon\u010d\u00ed pripojenia po prvom pokuse o autentiz\u00e1ciu. Do direkt\u00edvy PerSourcePenalties bol pridan\u00fd trieda \u201erefuseconnection\u201c, ktor\u00e1 sa aplikuje pri ukon\u010den\u00ed pripojenia po aktiv\u00e1cii \u201eRefuseConnection\u201c.\n<li class=\"l\"> V klientovi ssh bola ukon\u010den\u00e1 podpora kompresie d\u00e1t pred autentifik\u00e1ciou, \u010do v\u00fdrazne zvy\u0161uje povrch \u00fatoku na SSH servery a vytv\u00e1ra rizik\u00e1 pou\u017eitia nepriamych met\u00f3d anal\u00fdzy inform\u00e1ci\u00ed odosielan\u00fdch po\u010das autentifik\u00e1cie. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-newyork\/\"   title=\"serveri\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2785\">serveri<\/a> V sshd bola kompresia pred autentifik\u00e1ciou vypnut\u00e1 u\u017e sk\u00f4r.\n<li class=\"l\"> V ssh a sshd pri spracovan\u00ed argumentov direkt\u00edvy \u201eMatch\u201c sa pou\u017e\u00edvaj\u00fa pravidl\u00e1 podobn\u00e9 shellov\u00fdm pravidl\u00e1m pre pr\u00e1cu s re\u0165azcami uzavret\u00fdmi v \u00favodzovk\u00e1ch, ktor\u00e9 podporuj\u00fa vnoren\u00e9 obalenie a escapovanie pomocou znaku \u201e\\\u201c.\n<li class=\"l\"> V konfigura\u010dnom s\u00fabore ssh_config je v direkt\u00edve \u201eInclude\u201c zabezpe\u010den\u00e1 podpora premenn\u00fdch prostredia a \u201e%\u201c-substit\u00faci\u00ed, tak\u00fdch ist\u00fdch ako v direkt\u00edve \u201eMatch Exec\u201c.\n<li class=\"l\"> V sshd_config bola do direkt\u00edvy Match pridan\u00e1 mo\u017enos\u0165 \u201einvalid-user\u201c, ktor\u00e1 sa aktivuje pri pokuse o prihl\u00e1senie s neplatn\u00fdm pou\u017e\u00edvate\u013esk\u00fdm menom.\n<li class=\"l\"> V ssh a sshd sa vyu\u017e\u00edva r\u00fdchlej\u0161ia implement\u00e1cia algoritmu \u201eStreamlined NTRUPrime\u201c. Pre hybridn\u00fd algoritmus v\u00fdmeny k\u013e\u00fa\u010dov Streamlined NTRUPrime\/X25519 bola pridan\u00e1 mo\u017enos\u0165 pou\u017eitia n\u00e1zvu \u201esntrup761x25519-sha512\u201c, okrem \u0161pecifick\u00e9ho pre SSH n\u00e1zvu \u201esntrup761x25519-sha512@openssh.com\u201c.\n<li class=\"l\"> V ssh, sshd a ssh-agent bola pridan\u00e1 funkcia ochrany pred uviaznut\u00edm priv\u00e1tnych k\u013e\u00fa\u010dov do core s\u00faborov, ktor\u00e1 funguje v OpenBSD, Linuxe a FreeBSD.\n<li class=\"l\"> Spracovanie k\u013e\u00fa\u010dov bolo preveden\u00e9 na pou\u017e\u00edvanie rozhrania API EVP_PKEY, ktor\u00e9 poskytuje kni\u017enica libcrypto.\n<li class=\"l\"> Do sshd bolo pridan\u00e9 n\u00e1hodn\u00e9 zmenenie \u010dasov\u00e9ho limitu pripojenia (LoginGraceTime) v r\u00e1mci 4 sek\u00fand, aby sa s\u0165a\u017eilo ur\u010denie vypr\u0161ania \u010dasov\u00e9ho limitu.\n<li class=\"l\"> Rie\u0161en\u00e9 probl\u00e9my s kompil\u00e1ciou s kni\u017enicou 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 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f 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