{"id":99317,"date":"2021-03-03T10:22:34","date_gmt":"2021-03-03T08:22:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-8-5"},"modified":"2021-03-03T10:22:34","modified_gmt":"2021-03-03T08:22:34","slug":"reliz-openssh-8-5","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/reliz-openssh-8-5","title":{"rendered":"OpenSSH 8.5 v\u00e4ljaanne","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00e4rast viie kuu arendust on v\u00e4lja antud OpenSSH 8.5, avatud kliendi ja serveri teostus SSH 2.0 ja SFTP protokollide jaoks.    <\/p>\n<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 OpenSSH \u043d\u0430\u043f\u043e\u043c\u043d\u0438\u043b\u0438 \u043e \u0433\u0440\u044f\u0434\u0443\u0449\u0435\u043c \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0435 \u0432 \u0440\u0430\u0437\u0440\u044f\u0434 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u0445 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u043e\u0432, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0445 \u0445\u0435\u0448\u0438 SHA-1, \u0432 \u0441\u0432\u044f\u0437\u0438 \u0441 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u0435\u043c \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u043b\u043b\u0438\u0437\u0438\u043e\u043d\u043d\u044b\u0445 \u0430\u0442\u0430\u043a \u0441 \u0437\u0430\u0434\u0430\u043d\u043d\u044b\u043c \u043f\u0440\u0435\u0444\u0438\u043a\u0441\u043e\u043c (\u0441\u0442\u043e\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u0431\u043e\u0440\u0430 \u043a\u043e\u043b\u043b\u0438\u0437\u0438\u0438 \u043e\u0446\u0435\u043d\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e \u0432 50 \u0442\u044b\u0441\u044f\u0447 \u0434\u043e\u043b\u043b\u0430\u0440\u043e\u0432). \u0412 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u0431\u043b\u0438\u0436\u0430\u0439\u0448\u0438\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u0432 \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u044e\u0442 \u043e\u0442\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043f\u043e\u0434\u043f\u0438\u0441\u0435\u0439 \u043f\u043e \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c\u0443 \u043a\u043b\u044e\u0447\u0443 &#171;ssh-rsa&#187;, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0443\u043f\u043e\u043c\u0438\u043d\u0430\u0435\u0442\u0441\u044f \u0432 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u043c RFC \u0434\u043b\u044f \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SSH \u0438 \u043e\u0441\u0442\u0430\u0451\u0442\u0441\u044f \u0448\u0438\u0440\u043e\u043a\u043e \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0451\u043d\u043d\u044b\u043c \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435.    <\/p>\n<p>\u0414\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f ssh-rsa \u0432 \u0441\u0432\u043e\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u043f\u0440\u043e\u0431\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0438\u0442\u044c\u0441\u044f \u043f\u043e ssh \u0441 \u043e\u043f\u0446\u0438\u0435\u0439 &#171;-oHostKeyAlgorithms=-ssh-rsa&#187;. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043f\u043e\u0434\u043f\u0438\u0441\u0435\u0439 &#171;ssh-rsa&#187; \u043d\u0435 \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442 \u043f\u043e\u043b\u043d\u044b\u0439 \u043e\u0442\u043a\u0430\u0437 \u043e\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f RSA-\u043a\u043b\u044e\u0447\u0435\u0439, \u0442\u0430\u043a \u043a\u0430\u043a \u043f\u043e\u043c\u0438\u043c\u043e SHA-1 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b SSH \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0434\u0440\u0443\u0433\u0438\u0445 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u043e\u0432 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f \u0445\u044d\u0448\u0435\u0439. \u0412 \u0447\u0430\u0441\u0442\u043d\u043e\u0441\u0442\u0438, \u043f\u043e\u043c\u0438\u043c\u043e &#171;ssh-rsa&#187; \u043e\u0441\u0442\u0430\u043d\u0435\u0442\u0441\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u0432\u044f\u0437\u043e\u043a &#171;rsa-sha2-256&#187; (RSA\/SHA256) \u0438 &#171;rsa-sha2-512&#187; (RSA\/SHA512).    <\/p>\n<p>\u0414\u043b\u044f \u0441\u0433\u043b\u0430\u0436\u0438\u0432\u0430\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u0430 \u043d\u0430 \u043d\u043e\u0432\u044b\u0435 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u044b \u0432 OpenSSH 8.5 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0430 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430 UpdateHostKeys, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u043f\u0435\u0440\u0435\u0432\u0435\u0441\u0442\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432 \u043d\u0430 \u0431\u043e\u043b\u0435\u0435 \u043d\u0430\u0434\u0451\u0436\u043d\u044b\u0435 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u044b. \u041f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0443\u043a\u0430\u0437\u0430\u043d\u043d\u043e\u0439 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0435 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 &#171;hostkeys@openssh.com&#187;, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u0443 \u043f\u043e\u0441\u043b\u0435 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0438\u043d\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u043e \u0432\u0441\u0435\u0445 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0445 \u043a\u043b\u044e\u0447\u0430\u0445 \u0445\u043e\u0441\u0442\u0430. \u041a\u043b\u0438\u0435\u043d\u0442 \u043c\u043e\u0436\u0435\u0442 \u043e\u0442\u0440\u0430\u0437\u0438\u0442\u044c \u044d\u0442\u0438 \u043a\u043b\u044e\u0447\u0438 \u0432 \u0441\u0432\u043e\u0451\u043c \u0444\u0430\u0439\u043b\u0435 ~\/.ssh\/known_hosts, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043a\u043b\u044e\u0447\u0435\u0439 \u0445\u043e\u0441\u0442\u0430 \u0438 \u0443\u043f\u0440\u043e\u0449\u0430\u0435\u0442 \u0441\u043c\u0435\u043d\u0443 \u043a\u043b\u044e\u0447\u0435\u0439 \u043d\u0430 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/server\/dts-dronten\/\"   title=\"serveris\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2618\">serveris<\/a>.     <\/p>\n<p>UpdateHostKeys'i kasutamine on piiratud m\u00f5ne kogemusega, mis tulevikus v\u00f5ivad kehtetuks osutuda: v\u00f5ti peab olema mainitud UserKnownHostsFile'is ega tohi olla GlobalKnownHostsFile'is; v\u00f5ti peab olema ainult \u00fche nime all; hostiv\u00f5tme sertifikaati ei tohi kasutada; known_hosts'is ei tohi kasutada hostinime mustreid; VerifyHostKeyDNS seadistus peab olema keelatud; UserKnownHostsFile'i parameeter peab olema aktiivne.     <\/p>\n<p>Soovituseks migratsiooniks on mainitud rsa-sha2-256\/512, mis p\u00f5hineb RFC8332 RSA SHA-2 (toetatud OpenSSH 7.2-st ja kasutatakse vaikimisi), ssh-ed25519 (toetatud OpenSSH 6.5-st) ning ecdsa-sha2-nistp256\/384\/521, mis p\u00f5hineb RFC5656 ECDSA (toetatud OpenSSH 5.7-st).           <\/p>\n<p>Muud muudatused:  <\/p>\n<ul>\n<li class=\"l\"> Turvalisusega seotud muudatused:\n<ul>\n<li class=\"l\"> ssh-agentis on k\u00f5rvaldatud haavatavus, mis tuleneb juba vabastatud m\u00e4lu piirkonna korduvast vabastamisest (double-free). Probleem avaldub OpenSSH 8.2 v\u00e4ljalaskest ja seda saab v\u00f5imalikult \u00e4ra kasutada, kui r\u00fcndajal on juurdep\u00e4\u00e4s ssh-agent soketile lokaalses s\u00fcsteemis. Ekspluateerimist raskendab see, et soketisse p\u00e4\u00e4sevad ainult root ja algne kasutaja. K\u00f5ige t\u00f5en\u00e4olisem r\u00fcnnaku stsenaarium on agendi suunamine kontole, mis on kurjategijale alluv, v\u00f5i hostile, kus kurjategijal on root-juurdep\u00e4\u00e4s.\n<li class=\"l\"> sshd-sse on lisatud kaitse v\u00e4ga suurte parameetrite edastamise vastu kasutajanime all PAM alams\u00fcsteemi, mis v\u00f5imaldab blokeerida haavatavusi s\u00fcsteemi moodulites PAM (Pluggable Authentication Module). N\u00e4iteks muudatus v\u00f5imaldab takistada sshd-d kasutamast vektorina hiljuti avastatud root-haavatavust Solarises (CVE-2020-14871).      <\/ul>\n<li class=\"l\"> Muudatused, mis v\u00f5ivad rikkuda \u00fchilduvust:\n<ul>\n<li class=\"l\"> ssh-s ja sshd-s on \u00fcmber t\u00f6\u00f6tatud eksperimentaalne v\u00f5tmevahetuse meetod, mis on kvantkompuutritele vastupidav. Kvantkompuutrid lahendavad naturaalarvude faktoriseerimise \u00fclesande, mis on modernsete as\u00fcmmeetriliste kr\u00fcptimisalgoritmide aluseks, oluliselt kiiremini ning on klassikalistes protsessorites t\u00f5husalt lahendamatu. Kasutatav meetod p\u00f5hineb NTRU Prime algoritmil, mis on loodud postkvantumkr\u00fcptos\u00fcsteemide jaoks, ja v\u00f5tmevahetusmeetodil, mis p\u00f5hineb elliptilistel k\u00f5veratel X25519. Senise sntrup4591761x25519-sha512@tinyssh.org asemel identifitseeritakse meetod n\u00fc\u00fcd sntrup761x25519-sha512@openssh.com (sntrup4591761 algoritm asendatud sntrup761-ga).\n<li class=\"l\"> ssh-s ja sshd-s on muudetud digitaalsete allkirjade toetatavate algoritmide reklaamimise j\u00e4rjestust. Esmalt pakutakse ED25519 asemel ECDSA-d.\n<li class=\"l\"> ssh-s ja sshd-s toimub kvaliteediklassi TOS\/DSCP seadetega seadistus interaktiivsete sessioonide jaoks n\u00fc\u00fcd enne TCP-\u00fchenduse loomist.\n<li class=\"l\"> ssh-s ja sshd-s on l\u00f5petatud rijndael-cbc@lysator.liu.se kr\u00fcpteerimise toetamine, mis on identne aes256-cbc-ga ja mida kasutati enne RFC-4253 kinnitamist.\n<li class=\"l\"> Vaikimisi on CheckHostIP parameeter v\u00e4lja l\u00fclitatud, mille kasu on minimaalne, kuid selle kasutamine teeb m\u00e4rkimisv\u00e4\u00e4rselt keerulisemaks v\u00f5tmete rotatsiooni hostide puhul, mis asuvad koormuse tasandajate taga.      <\/ul>\n<li class=\"l\"> sshd-s on lisatud seaded PerSourceMaxStartups ja PerSourceNetBlockSize, et piirata protsesside k\u00e4ivitamise intensiivsust kliendi aadressiga seotud sidemetes. Need parameetrid v\u00f5imaldavad paremat kontrolli protsesside k\u00e4ivitamise piiri \u00fcle v\u00f5rreldes \u00fcldseadega MaxStartups.\n<li class=\"l\">  sshd-s ja ssh-s on lisatud uus seade LogVerbose, mis v\u00f5imaldab sundida logi taseme t\u00f5stmist jaotatud silumisinfo osas koos filtreerimisv\u00f5imalustega mustrite, funktsioonide ja failide j\u00e4rgi.\n<li class=\"l\"> ssh-s, kui uus hosti v\u00f5ti aktsepteeritakse, n\u00e4idatakse k\u00f5iki hostinimesid ja <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/lir\/ipv4\/\"   title=\"IP-aadresse\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"830\">IP-aadresse<\/a>, mis on seotud v\u00f5tmega.\n<li class=\"l\"> ssh-s on lubatud m\u00e4\u00e4rata valik UserKnownHostsFile=none, et keelata known_hosts faili kasutamine hosti v\u00f5tmete tuvastamisel.\n<li class=\"l\"> ssh_config-is on ssh jaoks lisatud seade KnownHostsCommand, mis v\u00f5imaldab saada known_hosts andmeid antud k\u00e4su v\u00e4ljundist.\n<li class=\"l\"> ssh_config-is on ssh jaoks lisatud valik PermitRemoteOpen, mis v\u00f5imaldab piirata sihtpunkti RemoteForward valiku kasutamisel SOCKS-iga.\n<li class=\"l\"> ssh-s on FIDO v\u00f5tmete puhul tagatud PIN-koodi taas k\u00fcsimine, kui digitaalallkirja operatsioon eba\u00f5nnestub vale PIN-i t\u00f5ttu ja kasutajalt ei k\u00fcsita PIN-koodi (n\u00e4iteks siis, kui \u00f5igeid biomeetrilisi andmeid ei \u00f5nnestunud hankida ja seade naasis k\u00e4sitsi PIN-i sisestamise juurde).\n<li class=\"l\"> sshd-s on Linuxi platvormil p\u00f5hinev seccomp-bpf protsessi isoleerimise mehhanism saanud t\u00e4iendavat s\u00fcsteemi s\u00fcsteemi k\u00f5ne toetust.\n<li class=\"l\"> Ajakohastatud utiliit contrib\/ssh-copy-id.          <\/ul>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54690\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u043f\u044f\u0442\u0438 \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 8.5, \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. \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 OpenSSH \u043d\u0430\u043f\u043e\u043c\u043d\u0438\u043b\u0438 \u043e \u0433\u0440\u044f\u0434\u0443\u0449\u0435\u043c \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0435 \u0432 \u0440\u0430\u0437\u0440\u044f\u0434 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u0445 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u043e\u0432, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0445 \u0445\u0435\u0448\u0438 SHA-1, \u0432 \u0441\u0432\u044f\u0437\u0438 \u0441 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u0435\u043c \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u043b\u043b\u0438\u0437\u0438\u043e\u043d\u043d\u044b\u0445 \u0430\u0442\u0430\u043a \u0441 \u0437\u0430\u0434\u0430\u043d\u043d\u044b\u043c \u043f\u0440\u0435\u0444\u0438\u043a\u0441\u043e\u043c (\u0441\u0442\u043e\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u0431\u043e\u0440\u0430 \u043a\u043e\u043b\u043b\u0438\u0437\u0438\u0438 \u043e\u0446\u0435\u043d\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e \u0432 50 \u0442\u044b\u0441\u044f\u0447 \u0434\u043e\u043b\u043b\u0430\u0440\u043e\u0432). \u0412 \u043e\u0434\u043d\u043e\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-99317","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 \u043f\u044f\u0442\u0438 \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 8.5, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 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