{"id":183658,"date":"2026-10-06T22:53:58","date_gmt":"2026-10-06T20:53:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/vypusk-openssh-10-6-s-ustraneniem-uyazvimostej"},"modified":"2026-10-06T22:54:02","modified_gmt":"2026-10-06T20:54:02","slug":"openssh-10-6-released-with-vulnerability-fixes","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/openssh-10-6-released-with-vulnerability-fixes","title":{"rendered":"Vyd\u00e1n\u00ed OpenSSH 10.6 s odstran\u011bn\u00edm zranitelnost\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byla vyd\u00e1na verze OpenSSH 10.6, otev\u0159en\u00e9 implementace klienta a serveru pro pr\u00e1ci s protokoly SSH 2.0 a SFTP. Byly odstran\u011bny bezpe\u010dnostn\u00ed probl\u00e9my, z nich\u017e v\u011bt\u0161ina byla zji\u0161t\u011bna anal\u00fdzou k\u00f3du pomoc\u00ed AI n\u00e1stroj\u016f (CVE identifik\u00e1tory nebyly p\u0159id\u011bleny):  <\/p>\n<ul>\n<li class=\"l\"> Zranitelnost v sftp umo\u017e\u0148uj\u00edc\u00ed zapisov\u00e1n\u00ed souboru mimo c\u00edlov\u00fd adres\u00e1\u0159 p\u0159i interakci s kontrolovan\u00fdm serverem \u00fato\u010dn\u00edka.\n<li class=\"l\"> Dv\u011b zranitelnosti v implementaci GSSAPI v sshd, zp\u016fsoben\u00e9 uchov\u00e1v\u00e1n\u00edm stavu mezi r\u016fzn\u00fdmi pokusy o autentizaci. P\u0159ihla\u0161ovac\u00ed \u00fadaje GSSAPI mohly b\u00fdt uchov\u00e1ny po ne\u00fasp\u011b\u0161n\u00e9m pokusu o autentizaci a pou\u017eity po n\u00e1sledn\u00e9m \u00fasp\u011b\u0161n\u00e9m pokusu o autentizaci. Probl\u00e9my se projevuj\u00ed p\u0159i aktivaci nastaven\u00ed GSSAPIAuthentication.\n<li class=\"l\"> Podpora LZ77 komprese byla v sshd a ssh zak\u00e1z\u00e1na kv\u016fli mo\u017enosti prov\u00e1d\u011bn\u00ed \u00fatok\u016f prost\u0159ednictv\u00edm bo\u010dn\u00edch kan\u00e1l\u016f, kter\u00e9 umo\u017e\u0148uj\u00ed obnovit obsah z jin\u00e9 relace p\u0159i p\u0159ipojen\u00ed p\u0159es sd\u00edlen\u00e9 multiplexovan\u00e9 spojen\u00ed s ob\u011bt\u00ed, p\u0159i\u010dem\u017e \u0159\u00edzen\u00e9 vstupy \u00fato\u010dn\u00edka ovliv\u0148uj\u00ed celkovou d\u00e9lku p\u0159en\u00e1\u0161en\u00fdch \u0161ifrovan\u00fdch zpr\u00e1v (LZ77 nahrazuje opakuj\u00edc\u00ed se \u0159\u00e1dky odkazy v r\u00e1mci spole\u010dn\u00e9ho bufferu pro v\u0161echny kan\u00e1ly).\n<li class=\"l\"> V utilit\u011b ssh je zak\u00e1z\u00e1no pou\u017e\u00edvat znaky &#8216;$&#8217; a &#8216;&#092;&#8217; v u\u017eivatelsk\u00fdch jm\u00e9nech zadan\u00fdch v p\u0159\u00edkazov\u00e9 \u0159\u00e1dce, proto\u017ee by tak mohl b\u00fdt proveden k\u00f3d p\u0159i nahrazov\u00e1n\u00ed jmen v direktiv\u00e1ch ProxyCommand a Match exec uveden\u00fdch v nastaven\u00ed.\n<li class=\"l\"> V ssh-keygen byla opravena nespr\u00e1vn\u00e1 manipulace s letn\u00edm \u010dasem, vedouc\u00ed k posunu platnosti certifik\u00e1t\u016f o 1 hodinu.\n<li class=\"l\"> Za \u00fa\u010delem zablokov\u00e1n\u00ed vytv\u00e1\u0159en\u00ed zip bomb byla do sshd a ssh p\u0159id\u00e1na kontrola p\u0159ekro\u010den\u00ed maxim\u00e1ln\u00ed velikosti paketu p\u0159i dekompresi dat.\n<li class=\"l\"> V sshd byla vy\u0159e\u0161ena probl\u00e9my, kter\u00e1 umo\u017e\u0148ovala obej\u00edt omezen\u00ed kl\u00ed\u010dov\u00e9ho slova &#171;restrict&#187; v souboru authorized_keys, co\u017e nebylo aplikov\u00e1no na tunely (PermitTunnel).\n<li class=\"l\"> V sshd byla odstran\u011bna nespr\u00e1vn\u00e1 anal\u00fdza volby &#171;none&#187; uvnit\u0159 blok\u016f Match, kter\u00e1 byla v n\u011bkter\u00fdch direktiv\u00e1ch, jako je AuthorizedPrincipalsFile, interpretov\u00e1na jako n\u00e1zev souboru, a ne jako indik\u00e1tor vypnut\u00ed direktivy.\n<li class=\"l\"> V sshd bylo odstran\u011bno nep\u0159\u00edtomnost resetov\u00e1n\u00ed root-privil\u00e9gi\u00ed na platform\u00e1ch, kter\u00e9 nepodporuj\u00ed p\u0159enos souborov\u00fdch deskriptor\u016f a vy\u017eaduj\u00ed pro p\u0159id\u011blen\u00ed PTY pr\u00e1va root. Probl\u00e9m se projevuje na QNX 6, SCO OpenServer 5 a p\u0159i sestavov\u00e1n\u00ed s volbou &#171;&#8212;disable-fd-passing&#187;.    <\/ul>\n<p>Zm\u011bny nesouvisej\u00edc\u00ed s zranitelnostmi:  <\/p>\n<ul>\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora hybridn\u00edho kryptografick\u00e9ho algoritmu ssh-mldsa44-ed25519, odoln\u00e9ho v\u016f\u010di \u00fato\u010den\u00ed na kvantov\u00fdch po\u010d\u00edta\u010d\u00edch.\n<li class=\"l\"> V sshd_config byla nastavena a ve v\u00fdchoz\u00edm nastaven\u00ed aktivov\u00e1na mo\u017enost WarnWeakCrypto pro spr\u00e1vu v\u00fdstupu varov\u00e1n\u00ed p\u0159i navazov\u00e1n\u00ed spojen\u00ed pou\u017eit\u00edm algoritm\u016f v\u00fdm\u011bny kl\u00ed\u010d\u016f, kter\u00e9 nejsou odoln\u00e9 v\u016f\u010di \u00fatok\u016fm na kvantov\u00fdch po\u010d\u00edta\u010d\u00edch.\n<li class=\"l\"> V ssh-keygen a ssh-add byla implementov\u00e1na kontrola politiky credProtect v p\u0159ihla\u0161ovac\u00edch \u00fadaj\u00edch k spln\u011bn\u00ed po\u017eadavk\u016f na ov\u011b\u0159en\u00ed (PIN nebo biometrie) p\u0159ed p\u0159\u00edstupem k rezidentn\u00edm kl\u00ed\u010d\u016fm na tokeny FIDO.\n<li class=\"l\"> V ssh-add byla p\u0159id\u00e1na zna\u010dka &#171;-P&#187; pro p\u0159esko\u010den\u00ed voliteln\u00e9ho zad\u00e1n\u00ed PIN k\u00f3du pro tokeny FIDO a PKCS#11.\n<li class=\"l\"> V ssh, p\u0159\u00edkaz ~I, byl implementov\u00e1n v\u00fdstup informac\u00ed o verz\u00edch na lok\u00e1ln\u00edch a vzd\u00e1len\u00fdch syst\u00e9mech.\n<li class=\"l\"> V sftp byly do p\u0159\u00edkaz\u016f mkdir\/lmkdir p\u0159id\u00e1ny zna\u010dka &#8216;-p&#8217; pro vytv\u00e1\u0159en\u00ed adres\u00e1\u0159\u016f v p\u0159\u00edpad\u011b pot\u0159eby.\n<li class=\"l\"> V ssh-keygen byl p\u0159id\u00e1n re\u017eim &#171;hexdump&#187; pro export kl\u00ed\u010d\u016f ve form\u011b hexadecim\u00e1ln\u00edch dump\u016f (nap\u0159\u00edklad pro vlo\u017een\u00ed do dokumentace).\n<li class=\"l\"> V ssh a sshd byla v direktiv\u011b ChannelTimeout povolena specifikace \u010dasov\u00fdch limit\u016f s p\u0159esnost\u00ed na zlomky sekundy.\n<li class=\"l\"> V sshd byla p\u0159id\u00e1na mo\u017enost AgentSocketPath pro ur\u010den\u00ed cesty k $SSH_AUTH_SOCK p\u0159i p\u0159ed\u00e1v\u00e1n\u00ed agenta (nap\u0159. user:.ssh\/agent pro podadres\u00e1\u0159e v $HOME a shared:\/tmp pro sd\u00edlen\u00e9 adres\u00e1\u0159e).\n<li class=\"l\"> V ssh-agent byla p\u0159id\u00e1na zna\u010dka &#171;-A&#187; pro ur\u010den\u00ed adres\u00e1\u0159\u016f se sokety agenta, ve kter\u00fdch lze pou\u017e\u00edvat prefixy &#171;user:&#187; a &#171;shared:&#187; jako v mo\u017enosti AgentSocketPath.\n<li class=\"l\"> V sshd byla kontrola ve\u0159ejn\u00fdch kl\u00ed\u010d\u016f odd\u011blena od pokus\u016f o autentifikaci. Byla p\u0159id\u00e1na volba &#171;PubkeyOptions max-pk-ok:nnnn&#187; pro nastaven\u00ed po\u010dtu pokus\u016f o kontrolu ve\u0159ejn\u00fdch kl\u00ed\u010d\u016f (v\u00fdchoz\u00ed hodnota je 6), po kter\u00e9 bude spojen\u00ed p\u0159eru\u0161eno z d\u016fvodu limitu MaxAuthTries.\n<li class=\"l\"> V ssh a sshd byla do volby TCPKeepAlive p\u0159id\u00e1na podpora hodnoty &#171;all&#187;, zahrnuj\u00edc\u00ed odes\u00edl\u00e1n\u00ed keepalive paket\u016f nejen pro hlavn\u00ed spojen\u00ed, ale tak\u00e9 pro p\u0159esm\u011brovan\u00e1 p\u0159es n\u011bj spojen\u00ed.          <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66410\">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 \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.6, \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. \u0423\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c\u044e, \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u043f\u0440\u0438 \u0430\u043d\u0430\u043b\u0438\u0437\u0435 \u043a\u043e\u0434\u0430 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c AI-\u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u0432 (CVE-\u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u043d\u0435 \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u044b): \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 sftp, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0444\u0430\u0439\u043b \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0446\u0435\u043b\u0435\u0432\u043e\u0439 \u0434\u0438\u0440\u0435\u043a\u0442\u043e\u0440\u0438\u0438 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0438 \u043a \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u043e\u043c\u0443 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0430\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u0443. \u0414\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 GSSAPI [&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-183658","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 -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.6, \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 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