{"id":95368,"date":"2020-09-28T13:42:14","date_gmt":"2020-09-28T11:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-8-4"},"modified":"2020-09-28T13:42:14","modified_gmt":"2020-09-28T11:42:14","slug":"reliz-openssh-8-4","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/reliz-openssh-8-4","title":{"rendered":"OpenSSH 8.4 v\u00e4ljalase","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00e4rast nelja kuu arendust <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.mindrot.org\/pipermail\/openssh-unix-dev\/2020-September\/038826.html\">esitati<\/a><\/noindex> v\u00e4ljaanne OpenSSH 8.4, avatud rakenduse kliendi ja serveri jaoks, mis t\u00f6\u00f6tavad SSH 2.0 ja SFTP protokollide kaudu.<\/p>\n<p>Peamised muudatused:<\/p>\n<ul>\n<li class=\"l\"> Turvalisusega seotud muudatused:\n<ul>\n<li class=\"l\"> SSH-agendis, FIDO v\u00f5tmete kasutamisel, mis ei ole loodud SSH autentimiseks (v\u00f5tme identifikaator ei alga stringiga \"ssh:\"), rakendatakse n\u00fc\u00fcd kontroll, et s\u00f5num signeeritakse SSH protokolli rakendatud meetoditega. Muudatus ei luba ssh-agendit suunata kaughostidesse, millel on FIDO v\u00f5tmed, et takistada nende v\u00f5tmete kasutamist veebiautentimise allkirjade koostamiseks (vastupidine juhtum, kus brauser v\u00f5ib allkirjastada SSH-p\u00e4ringu, on esialgu v\u00e4listatud, t\u00e4nu v\u00f5tme identifikaatori \"ssh:\" prefiksi kasutamisele).\n<li class=\"l\"> ssh-keygenis on residentse v\u00f5tmete genereerimisel lisatud tugi credProtect laiendusele, mida kirjeldatakse FIDO 2.1 spetsifikatsioonis, pakkudes v\u00f5tmete t\u00e4iendavat kaitset, n\u00f5udes PIN-koodi sisestamist enne mistahes toimingute sooritamist, mis v\u00f5ib viia residentse v\u00f5tme v\u00e4ljav\u00f5tmiseni tokenist.\n<\/ul>\n<li class=\"l\"> Muudatused, mis v\u00f5ivad rikkuda \u00fchilduvust:\n<ul>\n<li class=\"l\"> FIDO\/U2F toe toetamiseks soovitatakse kasutada teeki libfido2 v\u00e4hemalt versioonis 1.5.0. Osaliselt on v\u00f5imalik kasutada ka vanemaid v\u00e4ljaandeid, kuid sellisel juhul ei ole saadaval selliseid funktsioone nagu residentse v\u00f5tmed, PIN-koodi p\u00e4ring ja mitme tokeni \u00fchendamine.\n<li class=\"l\"> ssh-keygenis on FIDO v\u00f5tme genereerimise ajal opionaalsete andmete t\u00f5endamise vormingusse lisatud autentifikaatori andmed, mis on vajalikud t\u00f5endavate digiallkirjade kontrollimiseks.\n<li class=\"l\"> On muudetud API-d, mida OpenSSH kasutab FIDO tokenite aadressi kihti suhtlemiseks.\n<li class=\"l\"> T\u00f6\u00f6tlemiseks m\u00f5eldud OpenSSH versiooni kompileerimisel on n\u00fc\u00fcd vajalik automake configure skripti ja sellega seotud ehitusfailide genereerimiseks (kui kompileerimist teostatakse avaldatud tar-arhiivist koos koodiga, ei ole configure regeneratsioon vajalik).\n<\/ul>\n<li class=\"l\"> SSH-s ja ssh-keygenis on lisatud toetus FIDO v\u00f5tmetele, mis n\u00f5uavad kinnitust PIN-koodiga. SSH-keygenis on PIN-iga v\u00f5tmete genereerimiseks lisatud valik \"verify-required\". Selliste v\u00f5tmete kasutamisel k\u00fcsitakse kasutajalt allkirjastamise operatsiooni sooritamise eel PIN-koodi sisestamist.\n<li class=\"l\"> SSH-s on authorized_keys seadistuses rakendatud valik \"verify-required\", mis n\u00f5uab kasutaja kohaloleku verifitseerimist tokeniga toimetamisel. FIDO standard sisaldab mitmeid sarnase verifitseerimise v\u00f5imalusi, kuid praegu toetab OpenSSH ainult PIN-koodip\u00f5hist kontrolli.\n<li class=\"l\"> SSHD-s ja ssh-keygenis on lisatud digitaalsete allkirjade kontrollimise tugi, mis vastab FIDO WebAuthn standardile, mis v\u00f5imaldab FIDO v\u00f5tmete kasutamist veebibrauserites.\n<li class=\"l\"> SSH seadetes CertificateFile,<br \/>\n   ControlPath, IdentityAgent, IdentityFile, LocalForward ja<br \/>\n   RemoteForwardis on lubatud keskkonnamuutujate v\u00e4\u00e4rtuste asendamine formadis \"${ENV}\". <\/p>\n<li class=\"l\"> SSH-s ja ssh-agentis on lisatud keskkonnamuutuja $SSH_ASKPASS_REQUIRE tugi, mida saab kasutada ssh-askpassi v\u00e4ljakutsumise sissel\u00fclitamiseks v\u00f5i v\u00e4ljal\u00fclitamiseks.\n<li class=\"l\"> SSH-s on ssh_configis direktiivis AddKeysToAgent lisatud v\u00f5imalus piirata v\u00f5tme kehtivuse aega. P\u00e4rast m\u00e4\u00e4ratud limiidi m\u00f6\u00f6dumist eemaldatakse v\u00f5tmed automaatselt ssh-agentist.\n<li class=\"l\"> SCP ja SFTP-s saab n\u00fc\u00fcd lipuga \"-A\" selgelt lubada edastamise scp ja sftp kaudu ssh-agendi abil (vaikimisi on edastamine keelatud).\n<li class=\"l\"> SSH seadetes on lisatud toetus asendusele \"%k\", mis m\u00e4\u00e4rab hosti v\u00f5tme nime. Seda v\u00f5imalust saab kasutada v\u00f5tmete jaotamiseks eraldi failidesse (n\u00e4iteks \"UserKnownHostsFile ~\/.ssh\/known_hosts.d\/%k\").\n<li class=\"l\"> Lubatud on kasutada operatsiooni \"ssh-add -d -\" v\u00f5tmete lugemiseks stdinist, mis tuleb eemaldada.\n<li class=\"l\"> SSHD-s on logitud \u00fchenduste k\u00e4rpimise protsessi alguse ja l\u00f5pu kajastamine, mida reguleeritakse MaxStartups parameetriga.\n<\/ul>\n<p>OpenSSH arendajad meenutasid ka ootel olevat SHA-1 r\u00e4sigeomede aegumist. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52149\">t\u00f5hususe<\/a><\/noindex> efektiivsuse kollisioonir\u00fcnnakute jaoks m\u00e4\u00e4ratud eelistuste suhtes (kollisiooni leidmise kulud on umbes 45 tuhat dollarit). \u00dches j\u00e4rgmistest v\u00e4ljaannetest plaanitakse vaikev\u00e4\u00e4rtusena keelata avaliku v\u00f5tme digitaalsete allkirjade algoritmi 'ssh-rsa' kasutamine, mida mainitakse SSH protokolli algses RFC-s ja mis on praktikas endiselt laialdaselt levinud (ssh-rsa rakendamise kontrollimiseks oma s\u00fcsteemides v\u00f5ib proovida ssh-\u00fchenduse loomist valikuga '-oHostKeyAlgorithms=-ssh-rsa').<\/p>\n<p>Uue OpenSSH algoritmide eelneva \u00fclemineku sujuvamaks muutmiseks on j\u00e4rgmises versioonis vaikimisi sisse l\u00fclitatud seadistus UpdateHostKeys, mis v\u00f5imaldab automaatset \u00fcleminekut klientidele turvalisematele algoritmidele. Soovitatud migratsioonialgoritmid on rsa-sha2-256\/512, mis p\u00f5hinevad RFC8332 RSA SHA-2 (toetatakse alates OpenSSH 7.2 ja on vaikimisi kasutusel), ssh-ed25519 (toetatakse alates OpenSSH 6.5) ja ecdsa-sha2-nistp256\/384\/521, mis p\u00f5hinevad RFC5656 ECDSA (toetatakse alates OpenSSH 5.7). <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Allikas: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53793\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0447\u0435\u0442\u044b\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 8.4, \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: \u0418\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0435 \u0441 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c\u044e: \u0412 ssh-agent \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u043a\u043b\u044e\u0447\u0435\u0439 FIDO, \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0435 \u0434\u043b\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0447\u0435\u0440\u0435\u0437 SSH (\u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u043a\u043b\u044e\u0447\u0430 \u043d\u0430\u0447\u0438\u043d\u0430\u0435\u0442\u0441\u044f \u043d\u0435 \u0441\u043e \u0441\u0442\u0440\u043e\u043a\u0438 &#171;ssh:&#187;), \u0442\u0435\u043f\u0435\u0440\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430, \u0447\u0442\u043e \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u0434\u043f\u0438\u0441\u0430\u043d\u043e \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c [&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-95368","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 \u0447\u0435\u0442\u044b\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 8.4, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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