{"id":105252,"date":"2022-10-05T09:36:48","date_gmt":"2022-10-05T07:36:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-9-1"},"modified":"2022-10-05T09:36:48","modified_gmt":"2022-10-05T07:36:48","slug":"reliz-openssh-9-1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/reliz-openssh-9-1","title":{"rendered":"Vyd\u00e1n\u00ed OpenSSH 9.1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po \u0161esti m\u011bs\u00edc\u00edch v\u00fdvoje byl publikov\u00e1n release OpenSSH 9.1, otev\u0159en\u00e9 realizace klienta a serveru pro pr\u00e1ci s protokoly SSH 2.0 a SFTP. Vyd\u00e1n\u00ed je charakterizov\u00e1no p\u0159ev\u00e1\u017en\u011b jako opravn\u00e9, v\u010detn\u011b odstran\u011bn\u00ed n\u011bkolika potenci\u00e1ln\u00edch zranitelnost\u00ed zp\u016fsoben\u00fdch probl\u00e9my s pam\u011bt\u00ed:  <\/p>\n<ul>\n<li class=\"l\"> Jednobajtov\u00e9 p\u0159epln\u011bn\u00ed v k\u00f3du zpracov\u00e1n\u00ed SSH banneru v utilit\u011b ssh-keyscan.\n<li class=\"l\"> Dvojit\u00fd vol\u00e1n\u00ed funkce free() v p\u0159\u00edpad\u011b chyby p\u0159i v\u00fdpo\u010dtu hash\u016f pro soubory v k\u00f3du vytv\u00e1\u0159en\u00ed a ov\u011b\u0159ov\u00e1n\u00ed digit\u00e1ln\u00edch podpis\u016f v utilit\u011b ssh-keygen.\n<li class=\"l\"> Dvojit\u00fd vol\u00e1n\u00ed funkce free() p\u0159i zpracov\u00e1n\u00ed chyb v utilit\u011b ssh-keysign.    <\/ul>\n<p>Hlavn\u00ed zm\u011bny:  <\/p>\n<ul>\n<li class=\"l\"> Do ssh a sshd byla p\u0159id\u00e1na direktiva RequiredRSASize, kter\u00e1 umo\u017e\u0148uje ur\u010dit minim\u00e1ln\u011b povolenou velikost RSA kl\u00ed\u010d\u016f. V sshd budou kl\u00ed\u010de men\u0161\u00ed velikosti ignorov\u00e1ny, zat\u00edmco v ssh to povede k ukon\u010den\u00ed spojen\u00ed.\n<li class=\"l\"> P\u0159enosn\u00e1 verze OpenSSH byla p\u0159evedena na pou\u017e\u00edv\u00e1n\u00ed SSH kl\u00ed\u010d\u016f pro ov\u011b\u0159ov\u00e1n\u00ed digit\u00e1ln\u00edho podpisu commit\u016f a tag\u016f v Gitu.\n<li class=\"l\"> Direktivy SetEnv v konfigura\u010dn\u00edch souborech ssh_config a sshd_config nyn\u00ed aplikuj\u00ed hodnotu z prvn\u00edho zm\u00edn\u011bn\u00ed prom\u011bnn\u00e9 prost\u0159ed\u00ed, pokud byla v konfiguraci definov\u00e1na n\u011bkolikr\u00e1t (p\u0159edt\u00edm se pou\u017e\u00edvalo posledn\u00ed zm\u00edn\u011bn\u00ed).\n<li class=\"l\"> P\u0159i vol\u00e1n\u00ed utilit\u011b ssh-keygen s p\u0159\u00edznakem \u201a-A\u2018 (generov\u00e1n\u00ed v\u0161ech podporovan\u00fdch v\u00fdchoz\u00edch typ\u016f hostitelsk\u00fdch kl\u00ed\u010d\u016f) je zak\u00e1z\u00e1no generov\u00e1n\u00ed kl\u00ed\u010d\u016f DSA, kter\u00e9 se ji\u017e n\u011bkolik let standardn\u011b nepou\u017e\u00edvaj\u00ed.\n<li class=\"l\"> V sftp-server a sftp je implementov\u00e1no roz\u0161\u00ed\u0159en\u00ed \u201ausers-groups-by-id@openssh.com\u2018, kter\u00e9 d\u00e1v\u00e1 klientovi mo\u017enost po\u017e\u00e1dat o n\u00e1zvy u\u017eivatel\u016f a skupin odpov\u00eddaj\u00edc\u00ed uveden\u00e9mu souboru digit\u00e1ln\u00edch identifik\u00e1tor\u016f (uid a gid). V sftp je toto roz\u0161\u00ed\u0159en\u00ed pou\u017eito pro zobrazen\u00ed jmen p\u0159i v\u00fdpisu obsahu adres\u00e1\u0159e.\n<li class=\"l\"> V sftp-server je implementov\u00e1no roz\u0161\u00ed\u0159en\u00ed \u201ahome-directory\u2018 pro roz\u0161\u00ed\u0159en\u00ed cest ~\\\/ a ~user\\\/, alternativn\u00ed d\u0159\u00edve navr\u017een\u00e9mu roz\u0161\u00ed\u0159en\u00ed \u201aexpand-path@openssh.com\u2018 (roz\u0161\u00ed\u0159en\u00ed \u201ahome-directory\u2018 bylo navr\u017een\u00e9 pro standardizaci a ji\u017e je podporov\u00e1no n\u011bkter\u00fdmi klienty).\n<li class=\"l\"> Do ssh-keygen a sshd byla p\u0159id\u00e1na mo\u017enost specifikovat \u010das v \u010dasov\u00e9m p\u00e1smu UTC p\u0159i ur\u010dov\u00e1n\u00ed interval\u016f platnosti certifik\u00e1t\u016f a kl\u00ed\u010d\u016f, krom\u011b syst\u00e9mov\u00e9ho \u010dasu.\n<li class=\"l\"> V sftp je povoleno uv\u00e1d\u011bt dal\u0161\u00ed argumenty v mo\u017enosti \u201a-D\u2018 (nap\u0159\u00edklad \u201a\\\/usr\\\/libexec\\\/sftp-server -el debug3\u2018).\n<li class=\"l\"> V ssh-keygen je povoleno pou\u017eit\u00ed p\u0159\u00edznaku \u201a-U\u2018 (pou\u017eit\u00ed ssh-agent) spolu s operacemi \u201a-Y sign\u2018 pro ur\u010den\u00ed, \u017ee soukrom\u00e9 kl\u00ed\u010de jsou um\u00edst\u011bny v ssh-agent.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57871\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \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 \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.1, \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. \u0412\u044b\u043f\u0443\u0441\u043a \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0437\u0443\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0449\u0438\u0439 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043e\u043a, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430\u043c\u0438 \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 \u043f\u0430\u043c\u044f\u0442\u044c\u044e: \u041e\u0434\u043d\u043e\u0431\u0430\u0439\u0442\u043e\u0432\u043e\u0435 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0432 \u043a\u043e\u0434\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 SSH-\u0431\u0430\u043d\u043d\u0435\u0440\u0430 \u0432 \u0443\u0442\u0438\u043b\u0438\u0442\u0435 ssh-keyscan. \u0414\u0432\u043e\u0439\u043d\u043e\u0439 \u0432\u044b\u0437\u043e\u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 free() [&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-105252","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \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 \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.1, \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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SFTP.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/reliz-openssh-9-1","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":"2022-10-05T07:36:48+00:00","article:modified_time":"2022-10-05T07:36:48+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/105252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=105252"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/105252\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=105252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=105252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=105252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}