{"id":123456,"date":"2025-04-10T03:05:07","date_gmt":"2025-04-10T01:05:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-10-0"},"modified":"2025-04-10T03:05:07","modified_gmt":"2025-04-10T01:05:07","slug":"reliz-openssh-10-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/reliz-openssh-10-0","title":{"rendered":"Izlazak OpenSSH 10.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Objavljen je OpenSSH 10.0, otvorena implementacija klijenta i poslu\u017eitelja za rad s protokolima SSH 2.0 i SFTP. Glavne promjene:      <\/p>\n<ul>\n<li class=\"l\"> Uklonjena je podr\u0161ka za digitalne potpise temeljene na DSA algoritmu, \u010diji nivo za\u0161tite ne odgovara suvremenim zahtjevima. Tro\u0161kovi nastavka odr\u017eavanja nesigurnog DSA algoritma nisu opravdani, a njegova eliminacija potaknut \u0107e prestanak podr\u0161ke DSA u drugim SSH implementacijama i kriptografskim bibliotekama. Upotreba DSA klju\u010deva prema zadanim postavkama prekinuta je jo\u0161 2015. godine.\n<li class=\"l\"> Nastavljeno je dijeljenje sshd na nekoliko zasebnih izvr\u0161nih datoteka. U OpenSSH 9.8 proces sshd je podijeljen, a proces sshd-session preuzima zadatke vezane uz obradu sesija. U OpenSSH 10.0, kod za autentifikaciju premje\u0161ten je iz sshd-session u zasebni proces sshd-auth. Proces sshd-auth dodatno izolira podatke povezane s autentifikacijom u adresnom prostoru zasebnog procesa, \u010dime se spre\u010dava pristup tim podacima u memoriji tijekom napada na kod koji se koristi za obradu faza veze do dovr\u0161etka autentifikacije. Osim toga, ova promjena donekle smanjuje potro\u0161nju memorije, jer kod vezan za autentifikaciju sada postoji u memoriji samo tijekom procesa autentifikacije, a zatim se u\u010ditava nakon zavr\u0161etka procesa sshd-auth.\n<li class=\"l\"> U ssh-u se prema zadanim postavkama koristi hibridni algoritam za razmjenu klju\u010deva &#171;mlkem768x25519-sha256&#187;, otporan na pretragu na kvantnom ra\u010dunalu, koji predstavlja kombinaciju X25519 ECDH i ML-KEM (CRYSTALS-Kyber) algoritma standardiziranih od strane Nacionalnog instituta za standarde i tehnologiju SAD-a (NIST). ML-KEM koristi metode kriptografije temeljene na rje\u0161avanju problema teorije re\u0161etaka, a vrijeme rje\u0161avanja im nije razli\u010dito na obi\u010dnim i kvantnim ra\u010dunalima.\n<li class=\"l\"> U ssh_config dodana je podr\u0161ka za varijable &#171;%-token&#187; i pro\u0161irenje varijabli okru\u017eenja u direktivama SetEnv i User.\n<li class=\"l\"> U ssh_config i sshd_config dodana je podr\u0161ka za izraz &#171;Match version&#187;, koji omogu\u0107uje primjenu postavki ovisno o verziji OpenSSH, na primjer, za vezanje na OpenSSH 10 mo\u017eete navesti &#171;Match version OpenSSH_10.*&#187;.\n<li class=\"l\"> U ssh_config dodana je podr\u0161ka za izraze:\n<ul>\n<li class=\"l\"> &#171;Match sessiontype&#187;, koji omogu\u0107ava primjenu postavki ovisno o tipu tra\u017eenog sesije: &#171;shell&#187; za interaktivne sesije, &#171;exec&#187; za pokretanje komandi, &#171;subsystem&#187; za sftp i &#171;none&#187; za tunele i preusmjeravanje prometa.\n<li class=\"l\"> &#171;Match command&#187; za vezivanje radnji uz komande navedene u komandnoj liniji za pokretanje putem ssh.\n<li class=\"l\"> &#8216;Match tagged &#171;&#187;&#8216; i &#8216;Match command &#171;&#187;&#8216; za vezanje uz prazne oznake i pokretanje ssh-a bez navo\u0111enja izvr\u0161ne komande.    <\/ul>\n<li class=\"l\"> U sshd_config dopu\u0161teno je kori\u0161tenje maski u datote\u010dnim putanjama navedenim u direktivama AuthorizedKeysFile i AuthorizedPrincipalsFile.\n<li class=\"l\"> U ssh klijentu dodana je podr\u0161ka za opciju &#171;VersionAddendum&#187; za dodavanje proizvoljnog teksta u verzijsku oznaku (ranije je ova opcija bila dostupna samo za) <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hr\/server\/dts-los-angeles\/\"   title=\"poslu\u017eitelja\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3959\">poslu\u017eitelja<\/a> sshd).\n<li class=\"l\"> U alatima scp i sftp osigurana je prijenos postavke &#171;ControlMaster no&#187; za zabranjivanje kori\u0161tenja postoje\u0107ih veza prilikom ponovnog povezivanja na host.\n<li class=\"l\"> U sshd-u prema zadanim postavkama onemogu\u0107ena je podr\u0161ka za implementaciju Diffie-Hellman algoritma u kona\u010dnom polju, \u0161to je dovelo do uklanjanja metoda &#171;diffie-hellman-group*&#187; i &#171;diffie-hellman-group-exchange-*&#187; iz KEXAlgorithms. U usporedbi s Diffie-Hellman algoritmom temeljenim na elipti\u010dnim krivinama, daljinska implementacija je sporija i zahtijeva dodatne ra\u010dunalne resurse pri identi\u010dnoj razini sigurnosti.\n<li class=\"l\"> U ssh-u pri odabiru \u0161ifriranja za vezu, na\u010din AES-GCM sada je preferiraniji od AES-CTR. Prema zadanim postavkama postavljen je popis prioriteta pri odabiru \u0161ifriranja: Chacha20\/Poly1305, AES-GCM (128\/256) i AES-CTR (128\/192\/256).\n<li class=\"l\"> U ssh-agentu implementirano je uklanjanje svih u\u010ditanih klju\u010deva prilikom primanja signala SIGUSR1.\n<li class=\"l\"> U ssh-keygen dodana je podr\u0161ka za FIDO tokene koji ne vra\u0107aju podatke o attestaciji, poput WinHello.\n<li class=\"l\"> U ssh-agentu dodana je opcija &#171;-Owebsafe-allow=&#8230;&#187; za poni\u0161tavanje bijelog popisa FIDO aplikacija.\n<li class=\"l\"> Dodana je eksperimentalna alatka regress\/misc\/ssh-verify-attestation za verifikaciju podataka o attestaciji FIDO, koji se opcionalno generiraju putem ssh-keygen pri registraciji FIDO klju\u010deva.\n<li class=\"l\"> U ssh-keygenu je dopu\u0161teno koristiti &#171;-&#187; umjesto imena datoteke.\n<li class=\"l\"> U ssh-agentu i prijenosnoj verziji OpenSSH dodana je podr\u0161ka za aktivaciju preko socket-a u stilu systemd, provedena kori\u0161tenjem mehanizma LISTEN_PID\/LISTEN_FDS.\n<li class=\"l\"> U prijenosnoj verziji:\n<ul>\n<li class=\"l\"> Implementirana je podr\u0161ka za kriptografsku biblioteku AWS-LC (AWS libcrypto).\n<li class=\"l\"> U sshd dodana je podr\u0161ka za wtmpdb, analog wtmp-a koji nije podlo\u017ean problemu iz 2038. godine.\n<li class=\"l\"> U sshd-u dodana je opcija &#171;&#8212;with-linux-memlock-onfault&#187; za fiksiranje sshd-a u memoriji (zabrana izbacivanja u swap prostor).\n<li class=\"l\"> Dodana je opcija &#171;&#8212;with-security-key-standalone&#187; za izradu odvojene biblioteke sk-libfido2.\n<li class=\"l\"> U specifikaciji RPM paketa uklonjene su postavke izrade za RHEL 6.    <\/ul>\n<li class=\"l\"> Promjena u sshd-u vezana za sigurnost: direktiva DisableForwarding nije pravilno onemogu\u0107avala preusmjeravanje X11 protokola i pozive na ssh-agent. Preusmjeravanje X11 je po defaultu onemogu\u0107eno na strani servera, dok je preusmjeravanje ssh-agenta na strani klijenta.  <\/ul>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63042\">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 10.0, \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: \u0423\u0434\u0430\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043f\u043e\u0434\u043f\u0438\u0441\u0435\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 DSA, \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u0437\u0430\u0449\u0438\u0442\u044b \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043d\u0435 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u043c \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c. \u0417\u0430\u0442\u0440\u0430\u0442\u044b \u043d\u0430 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0438\u0435 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u043d\u0435\u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0433\u043e \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 DSA \u043d\u0435 \u043e\u043f\u0440\u0430\u0432\u0434\u044b\u0432\u0430\u044e\u0442 \u0441\u0435\u0431\u044f \u0438 \u0435\u0433\u043e \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442 \u0441\u0442\u0438\u043c\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 DSA \u0432 \u0434\u0440\u0443\u0433\u0438\u0445 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f\u0445 [&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-123456","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 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