{"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\/pl\/blog\/news\/dostupen-openssh-10-4","title":{"rendered":"Dost\u0119pna jest wersja OpenSSH 10.4","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po trzech miesi\u0105cach prac publikacja OpenSSH 10.4, otwartej realizacji klienta i serwera do pracy zgodnie z protoko\u0142ami SSH 2.0 i SFTP. G\u0142\u00f3wne zmiany:  <\/p>\n<ul>\n<li class=\"l\"> Dodano eksperymentalne wsparcie dla kombinowanej schemy generowania podpis\u00f3w cyfrowych &#171;mldsa44-ed25519&#187;, \u0142\u0105cz\u0105cej postkwantowy algorytm ML-DSA 44 i algorytm oparty na krzywych eliptycznych Ed25519. Aby w\u0142\u0105czy\u0107 wsparcie, nale\u017cy doda\u0107 &#171;mldsa44-ed25519&#187; do dyrektyw HostKeyAlgorithms i PubkeyAcceptedAlgorithms. Do generowania kluczy mo\u017cna u\u017cy\u0107 polecenia &#171;ssh-keygen -t mldsa44-ed25519&#187;.\n<li class=\"l\"> W ssh i sshd wprowadzono now\u0105 implementacj\u0119 systemu dopasowania wzorc\u00f3w, opart\u0105 na niedeterminowanym automacie sko\u0144czonym, niepodlegaj\u0105c\u0105 problemowi wyk\u0142adniczego wzrostu z\u0142o\u017cono\u015bci oblicze\u0144 przy u\u017cywaniu masek zawieraj\u0105cych wiele znak\u00f3w &#171;*&#187;.\n<li class=\"l\"> Zmieni\u0142o si\u0119 zachowanie wersji sshd na systemach Linux z w\u0142\u0105czonym filtrowaniem wywo\u0142a\u0144 systemowych przy pomocy seccomp. Wcze\u015bniej b\u0142\u0105d przy aktywacji SECCOMP lub NO_NEW_PRIVS na systemach Linux bez ich wsparcia prowadzi\u0142 do zapisu ostrze\u017cenia w logu i kontynuacji pracy bez izolacji, a teraz spowoduje awaryjne zako\u0144czenie.\n<li class=\"l\"> Przy u\u017cyciu opcji &#171;sshd -G&#187; w zrzucie konfiguracji dyrektywy s\u0105 teraz zapisywane z u\u017cyciem wielkich i ma\u0142ych liter, zamiast zapisywa\u0107 tylko ma\u0142ymi literami (tzn. &#171;PubkeyAuthentication&#187; zamiast &#171;pubkeyauthentication&#187;).\n<li class=\"l\"> Zachowanie ssh i sshd dostosowano do standardu RFC 4253: wysy\u0142anie podczas ponownej wymiany kluczy wiadomo\u015bci, niespowi\u0105zanych z wymian\u0105 kluczy, teraz skutkuje zako\u0144czeniem po\u0142\u0105czenia. Wcze\u015bniej napastnicy mogli przeprowadzi\u0107 atak DoS, niesko\u0144czono wysy\u0142aj\u0105c w trakcie wymiany kluczy wiadomo\u015bci zewn\u0119trzne, kt\u00f3re buforowa\u0142y si\u0119 na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/dts-dronten\/\" title=\"serwerze\" data-wpil-keyword-link=\"linked\">serwerze<\/a> i wykorzystywa\u0142y pami\u0119\u0107.            <\/ul>\n<p>Usuni\u0119to kilka problem\u00f3w z bezpiecze\u0144stwem:  <\/p>\n<ul>\n<li class=\"l\"> W narz\u0119dziu ssh wyeliminowano potencjalne odwo\u0142anie do pami\u0119ci po jej zwolnieniu (use-after-free) przy odwo\u0142aniu do z\u0142o\u015bliwego <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/dts-shicago\/\" title=\"serwera\" data-wpil-keyword-link=\"linked\">serwera<\/a>. Problem wykorzystuje si\u0119 poprzez zmian\u0119 klucza hosta w trakcie ponownej wymiany kluczy.\n<li class=\"l\"> Wykryto luk\u0119 w sftp, kt\u00f3ra pozwala na przesy\u0142anie plik\u00f3w do innego katalogu podczas \u0142\u0105czenia si\u0119 z z\u0142o\u015bliwym serwerem przy u\u017cyciu polecenia w formie &#171;sftp host: \/path .&#187;.\n<li class=\"l\"> Vulnerability in scp allowing files to be copied between two external <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/dts-dusseldorf\/\" title=\"serwerami\" data-wpil-keyword-link=\"linked\">serwerami<\/a>, jeden z nich jest kontrolowany przez atakuj\u0105cego, zorganizowa\u0107 zapis plik\u00f3w do katalogu nadrz\u0119dnego, znajduj\u0105cego si\u0119 na poziomie ni\u017cej ni\u017c katalog docelowy.\n<li class=\"l\"> Naprawiono problem w sshd, objawiaj\u0105cy si\u0119 przy korzystaniu z wewn\u0119trznej implementacji serwera SFTP (&#171;internal-sftp&#187;), wy\u0142\u0105czonej domy\u015blnie. Problem zwi\u0105zany jest z obcinaniem d\u0142ugich sekwencji w wierszu polece\u0144 po 9 argumentach, co prowadzi do odrzucenia kolejnych argument\u00f3w. W ten spos\u00f3b potencjalnie mog\u0105 by\u0107 odrzucone opcje zwi\u0105zane z bezpiecze\u0144stwem.\n<li class=\"l\"> W sshd usuni\u0119to problem, przez kt\u00f3ry dyrektywa &#171;DisableForwarding=yes&#187; nie wy\u0142\u0105cza\u0142a mo\u017cliwo\u015bci tworzenia tuneli dozwolonych opcj\u0105 &#171;PermitTunnel=yes&#187; (domy\u015blnie nieustawiona).\n<li class=\"l\"> W sshd naprawiono problem, kt\u00f3ry mo\u017cna wykorzysta\u0107 do inicjowania ataku typu odmowa us\u0142ugi na etapie przed przej\u015bciem uwierzytelnienia, gdy dyrektywa GSSAPIAuthentication jest w\u0142\u0105czona w ustawieniach (domy\u015blnie wy\u0142\u0105czona). Problem nie jest zablokowany przez limit &#171;MaxAuthTries&#187;, ale podlega ograniczeniu &#171;PerSourcePenalties&#187;.\n<li class=\"l\"> W sshd usuni\u0119to niedoci\u0105gni\u0119cia, przez kt\u00f3re nie zawsze dodawano minimalne op\u00f3\u017anienie mi\u0119dzy pr\u00f3bami autoryzacji.        <\/ul>\n<p>\u0179r\u00f3d\u0142o: <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 5.0.1.1 - 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 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