{"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\/hr\/blog\/news\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","title":{"rendered":"Izdanje OpenSSH 9.9 s podr\u0161kom za postkvantne algoritme \u0161ifriranja ML-KEM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Objavljeno je izdanje OpenSSH 9.9, otvorene implementacije klijenta i poslu\u017eitelja za rad s protokolima SSH 2.0 i SFTP. Glavne promjene:  <\/p>\n<ul>\n<li class=\"l\"> U ssh i sshd dodana je podr\u0161ka za hibridni algoritam razmjene klju\u010deva \u201emlkem768x25519-sha256\u201c, otpornog na brute force napade kvantnih ra\u010dunala i koji se sastoji od kombinacije X25519 ECDH i algoritma ML-KEM (CRYSTALS-Kyber), nedavno standardiziranog od strane Nacionalnog instituta za standarde i tehnologiju SAD-a (NIST). ML-KEM koristi metode kriptografije temeljenoj na rje\u0161avanju problema teorije re\u0161etki, \u010dije vrijeme rje\u0161avanja se ne razlikuje izme\u0111u klasi\u010dnih i kvantnih ra\u010dunala.\n<li class=\"l\"> U konfiguracijsku datoteku sshd_config dodana je klju\u010dna rije\u010d \u201eRefuseConnection\u201c, koja kada je postavljena, \u0107e uzrokovati da sshd prekida veze nakon prvog poku\u0161aja autentifikacije. U direktivu PerSourcePenalties dodana je klasa \u201erefuseconnection\u201c, koja se primjenjuje prilikom prekida veze nakon aktivacije \u201eRefuseConnection\u201c.\n<li class=\"l\"> U klijentu ssh ukinuta je podr\u0161ka za kompresiju podataka prije autentifikacije, \u0161to zna\u010dajno pove\u0107ava povr\u0161inu napada na SSH poslu\u017eitelje i stvara rizike za primjenu neizravnih metoda analize informacija koje se \u0161alju tijekom autentifikacije. U <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hr\/server\/dts-newyork\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2785\">serveru<\/a> sshd je kompresija prije autentifikacije prethodno isklju\u010dena.\n<li class=\"l\"> U ssh i sshd prilikom analize argumenata direktive \u201eMatch\u201c kori\u0161tena su pravila sli\u010dna shell-u za rad s nizovima unutar navodnika, koja podr\u017eavaju ugnije\u017edeno obavijanje i escape koriste\u0107i znak \u201e\\\u201c.\n<li class=\"l\"> U konfiguracijskoj datoteci ssh_config u direktivi \u201eInclude\u201c osigurana je podr\u0161ka za varijable okru\u017eenja i \u201e%\u201c-supstitucije, iste kao u direktivi \u201eMatch Exec\u201c.\n<li class=\"l\"> U sshd_config dodana je opcija \u201einvalid-user\u201c u direktivu Match, koja se aktivira prilikom poku\u0161aja prijave s neispravnim korisni\u010dkim imenom.\n<li class=\"l\"> U ssh i sshd implementirana je br\u017ea verzija algoritma \u201eStreamlined NTRUPrime\u201c. Za hibridni algoritam razmjene klju\u010deva Streamlined NTRUPrime\/X25519 dodana je mogu\u0107nost kori\u0161tenja imena \u201esntrup761x25519-sha512\u201c, uz specifi\u010dno SSH ime \u201esntrup761x25519-sha512@openssh.com\u201c.\n<li class=\"l\"> U ssh, sshd i ssh-agent dodana je za\u0161tita od osipanja privatnih klju\u010deva u core datotekama koja radi na OpenBSD, Linux i FreeBSD.\n<li class=\"l\"> Obrada klju\u010deva preba\u010dena je na kori\u0161tenje API-ja EVP_PKEY, koji pru\u017ea biblioteka libcrypto.\n<li class=\"l\"> U sshd je dodano nasumi\u010dno promjenjivo vrijeme isteka veze (LoginGraceTime) unutar 4 sekunde kako bi se ote\u017ealo odre\u0111ivanje isteka vremenskog ograni\u010denja.\n<li class=\"l\"> Problemi s izradom s Musl bibliotekom su rije\u0161eni.  <\/ul>\n<p>Izvor: <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 5.0.4 - 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 \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e 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