{"id":182500,"date":"2026-07-07T04:53:59","date_gmt":"2026-07-07T02:54:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupen-openssh-10-4"},"modified":"2026-07-07T04:53:59","modified_gmt":"2026-07-07T02:54:00","slug":"dostupen-openssh-10-4","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/dostupen-openssh-10-4","title":{"rendered":"K dispoz\u00edcii OpenSSH 10.4","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po troch mesiacoch v\u00fdvoja bol zverejnen\u00fd release OpenSSH 10.4, otvorenej implement\u00e1cie klienta a servera pre protokoly SSH 2.0 a SFTP. Hlavn\u00e9 zmeny:  <\/p>\n<ul>\n<li class=\"l\"> Pridan\u00e1 experiment\u00e1lna podpora kombinovanej sch\u00e9my na generovanie digit\u00e1lnych podpisov \u201emldsa44-ed25519\u201c, ktor\u00e1 kombinuje postkvantov\u00fd algoritmus ML-DSA 44 a algoritmus zalo\u017een\u00fd na eliptick\u00fdch krivk\u00e1ch Ed25519. Na aktiv\u00e1ciu podpory je potrebn\u00e9 prida\u0165 \u201emldsa44-ed25519\u201c do direkt\u00edv HostKeyAlgorithms a PubkeyAcceptedAlgorithms. Na generovanie k\u013e\u00fa\u010dov m\u00f4\u017eete pou\u017ei\u0165 pr\u00edkaz \u201essh-keygen -t mldsa44-ed25519\u201c.\n<li class=\"l\"> V ssh a sshd je implementovan\u00e1 nov\u00e1 verzia syst\u00e9mu zhodovania pod\u013ea \u0161abl\u00f3ny, zalo\u017een\u00e1 na nedeterministickom kone\u010dnom automate, ktor\u00e1 nie je ovplyvnen\u00e1 probl\u00e9mom exponenci\u00e1lneho rastu n\u00e1ro\u010dnosti v\u00fdpo\u010dtov pri pou\u017eit\u00ed masiek obsahuj\u00facich ve\u013ea znakov \u201e*\u201c.\n<li class=\"l\"> Bolo zmenen\u00e9 spr\u00e1vanie Linuxov\u00fdch verzi\u00ed sshd s povolenou filtr\u00e1ciou syst\u00e9mov\u00fdch volan\u00ed pomocou seccomp. Predt\u00fdm do\u0161lo k chybe pri aktiv\u00e1cii SECCOMP alebo NO_NEW_PRIVS na Linuxov\u00fdch syst\u00e9moch bez ich podpory, ktor\u00e1 viedla k zap\u00edsaniu varovania do logu a pokra\u010dovaniu v \u010dinnosti bez izol\u00e1cie, ale teraz to sp\u00f4sob\u00ed havarijn\u00e9 ukon\u010denie.\n<li class=\"l\"> Pri pou\u017eit\u00ed mo\u017enosti \u201esshd -G\u201c sa v dump konfigur\u00e1cie direkt\u00edvy teraz zapisuj\u00fa s pou\u017eit\u00edm ve\u013ek\u00fdch a mal\u00fdch p\u00edsmen, namiesto z\u00e1pisu iba mal\u00fdmi p\u00edsmenami (t.j. \u201ePubkeyAuthentication\u201c namiesto \u201epubkeyauthentication\u201c).\n<li class=\"l\"> Spr\u00e1vanie ssh a sshd bolo prisp\u00f4soben\u00e9 \u0161tandardu RFC 4253: odosielanie spr\u00e1v, ktor\u00e9 nie s\u00fa spojen\u00e9 s v\u00fdmenou k\u013e\u00fa\u010dov po\u010das op\u00e4tovnej v\u00fdmeny k\u013e\u00fa\u010dov, teraz povedie k ukon\u010deniu spojenia. Predt\u00fdm mohli \u00fato\u010dn\u00edci sp\u00f4sobi\u0165 DoS \u00fatok nekone\u010dn\u00fdm odosielan\u00edm cudz\u00edch spr\u00e1v po\u010das v\u00fdmeny k\u013e\u00fa\u010dov, ktor\u00e9 sa bufferovali na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-dronten\/\" title=\"serveri\" data-wpil-keyword-link=\"linked\">serveri<\/a> a spotrebov\u00e1vali pam\u00e4\u0165.            <\/ul>\n<p>Bolo opraven\u00fdch nieko\u013eko bezpe\u010dnostn\u00fdch probl\u00e9mov:  <\/p>\n<ul>\n<li class=\"l\"> V utilite ssh bola odstr\u00e1nen\u00e1 potenci\u00e1lna dereferenc\u00e1cia po uvo\u013enen\u00ed pam\u00e4te (use-after-free) pri pokuse o pr\u00edstup k \u0161kodliv\u00e9mu <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-shicago\/\" title=\"serveru\" data-wpil-keyword-link=\"linked\">serveru<\/a>. Probl\u00e9m sa zneu\u017e\u00edva cez zmenu hostite\u013esk\u00e9ho k\u013e\u00fa\u010da po\u010das op\u00e4tovnej v\u00fdmeny k\u013e\u00fa\u010dov.\n<li class=\"l\"> Zranite\u013enos\u0165 v sftp, ktor\u00e1 umo\u017e\u0148uje nahra\u0165 s\u00fabor do in\u00e9ho adres\u00e1ra pri pr\u00edstupe k \u0161kodliv\u00e9mu serveru s pou\u017eit\u00edm pr\u00edkazu vo forme \u201esftp host:\/path .\u201c.\n<li class=\"l\"> Zranite\u013enos\u0165 v scp, ktor\u00e1 umo\u017e\u0148uje pri kop\u00edrovan\u00ed s\u00faborov medzi dvoma extern\u00fdmi <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-dusseldorf\/\" title=\"servermi\" data-wpil-keyword-link=\"linked\">servermi<\/a>, jeden z ktor\u00fdch je pod kontrolou \u00fato\u010dn\u00edka, organizova\u0165 z\u00e1pis s\u00faborov do nadradenej adres\u00e1rovej \u0161trukt\u00fary, nach\u00e1dzaj\u00facej sa o \u00farove\u0148 ni\u017e\u0161ie ako cie\u013eov\u00e1 adres\u00e1rov\u00e1 \u0161trukt\u00fara.\n<li class=\"l\"> Bola odstr\u00e1nen\u00e1 probl\u00e9m v sshd, ktor\u00e1 sa prejavovala pri pou\u017eit\u00ed vn\u00fatornej implement\u00e1cie SFTP-servera (\u201einternal-sftp\u201c), predvolene vypnutej. Probl\u00e9m s\u00favis\u00ed s preru\u0161en\u00edm dlh\u00fdch sekvenci\u00ed v pr\u00edkazovom riadku po 9 argumente, \u010do vedie k vynechaniu nasleduj\u00facich argumentov. T\u00fdm p\u00e1dom m\u00f4\u017eu by\u0165 potenci\u00e1lne vynechan\u00e9 vo\u013eby s\u00favisiace s bezpe\u010dnos\u0165ou.\n<li class=\"l\"> V sshd bola odstr\u00e1nen\u00e1 nedokonalos\u0165, kv\u00f4li ktorej direkt\u00edva \u201eDisableForwarding=yes\u201c nevyp\u00ednala mo\u017enos\u0165 vytv\u00e1rania tunelov, povolen\u00fdch mo\u017enos\u0165ou \u201ePermitTunnel=yes\u201c (predvolene nie je nastaven\u00e1).\n<li class=\"l\"> V sshd bola odstr\u00e1nen\u00e1 probl\u00e9m, ktor\u00fd sa mohol vyu\u017ei\u0165 na iniciovanie odmietania slu\u017eby v \u0161t\u00e1diu pred autentifik\u00e1ciou pri povolen\u00ed v nastaveniach direkt\u00edvy GSSAPIAuthentication (predvolene je vypnut\u00e1). Probl\u00e9m sa nezablokuje pomocou limitu \u201eMaxAuthTries\u201c, ale patr\u00ed pod obmedzenie \u201ePerSourcePenalties\u201c.\n<li class=\"l\"> V sshd boli opraven\u00e9 nedostatky, kv\u00f4li ktor\u00fdm ne v\u017edy bola pridelen\u00e1 minim\u00e1lna oneskorenie medzi pokusmi o autentifik\u00e1ciu.        <\/ul>\n<p>Zdroj: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65854\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.4, \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: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043a\u043e\u043c\u0431\u0438\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0441\u0445\u0435\u043c\u044b \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043f\u043e\u0434\u043f\u0438\u0441\u0435\u0439 &#171;mldsa44-ed25519&#187;, \u0441\u043e\u0447\u0435\u0442\u0430\u044e\u0449\u0438\u0439 \u043f\u043e\u0441\u0442\u043a\u0432\u0430\u043d\u0442\u043e\u0432\u044b\u0439 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c ML-DSA 44 \u0438 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c \u043d\u0430 \u0431\u0430\u0437\u0435 \u044d\u043b\u043b\u0438\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u043a\u0440\u0438\u0432\u044b\u0445 Ed25519. \u0414\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c &#171;mldsa44-ed25519&#187; \u0432 \u0434\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u044b HostKeyAlgorithms \u0438 PubkeyAcceptedAlgorithms. [&hellip;]<\/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-182500","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.4, \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.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Alexander Kovalev\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/sk\/blog\/news\/dostupen-openssh-10-4\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.5\" \/>\n\t\t<meta property=\"og:locale\" content=\"sk_SK\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d OpenSSH 10.4 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.4, \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.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/sk\/blog\/news\/dostupen-openssh-10-4\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-07-07T02:54:00+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-07-07T02:54:00+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47OpenSSH 10.4 je k dispoz\u00edcii | ProHoster","description":"Po troch mesiacoch v\u00fdvoja bol vydan\u00fd OpenSSH 10.4, otvoren\u00e1 implement\u00e1cia klienta a servera pre pr\u00e1cu s protokolmi SSH 2.0 a SFTP.","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/dostupen-openssh-10-4","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d OpenSSH 10.4 | ProHoster","og:description":"\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.4, \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.","og:url":"https:\/\/prohoster.info\/sk\/blog\/news\/dostupen-openssh-10-4","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-07-07T02:54:00+00:00","article:modified_time":"2026-07-07T02:54:00+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"182500","title":null,"description":null,"keywords":null,"keyphrases":{"focus":[],"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2026-08-05 12:22:08","updated":"2026-08-05 12:22:08","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/182500","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/comments?post=182500"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/182500\/revisions"}],"predecessor-version":[{"id":182564,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/182500\/revisions\/182564"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/media?parent=182500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/categories?post=182500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/tags?post=182500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}