{"id":38754,"date":"2019-10-31T22:25:45","date_gmt":"2019-10-31T19:25:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/reliz-openssh-8-1\/"},"modified":"2019-10-31T22:25:45","modified_gmt":"2019-10-31T19:25:45","slug":"reliz-openssh-8-1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/reliz-openssh-8-1","title":{"rendered":"OpenSSH versioon 8.1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00e4rast kuue kuu arendust\u00f6\u00f6d <noindex><a rel=\"nofollow\" href=\"http:\/\/lists.mindrot.org\/pipermail\/openssh-unix-dev\/2019-October\/037966.html\">esitatud<\/a><\/noindex> v\u00e4ljalase <noindex><a rel=\"nofollow\" href=\"http:\/\/www.openssh.com\/\">OpenSSH 8.1<\/a><\/noindex>, avatud realiseerimisega kliendi ja serveri jaoks, et t\u00f6\u00f6tada SSH 2.0 ja SFTP protokollide kaudu. <\/p>\n<p>Uues v\u00e4ljaandes v\u00e4\u00e4rib erilist t\u00e4helepanu haavatavuse k\u00f5rvaldamine, mis puudutab ssh, sshd, ssh-add ja ssh-keygen. Probleem esineb XMSS t\u00fc\u00fcpi privaatv\u00f5tmete parsimise koodis ja v\u00f5imaldab r\u00fcndajal algatada t\u00e4isarvu \u00fclet\u00e4itumise. Haavatavust on m\u00e4rgitud kui ekspluateeritavat, kuid v\u00e4he kasutatavat, kuna XMSS v\u00f5ti toetus kuulub eksperimentaalsetesse omadustesse, mis on vaikimisi v\u00e4lja l\u00fclitatud (kandjal versioonis autoconf ei ole isegi XMSS lubamiseks koostamisvalikut).<\/p>\n<p>Peamised muudatused: <\/p>\n<ul>\n<li class=\"l\"> ssh, sshd ja ssh-agent <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50929\">lisatud<\/a><\/noindex> kood, mis takistab privaatv\u00f5tme taastamist, mis on operatiivm\u00e4lu, kui r\u00fcnnakud toimuvad k\u00fclgkanalite kaudu, nagu <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47856\">Spectre, Meltdown<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=41340\">RowHammer<\/a><\/noindex> ja <noindex><a rel=\"nofollow\" href=\"https:\/\/rambleed.com\/\">RAMBleed<\/a><\/noindex>. Era privaatv\u00f5tmed n\u00fc\u00fcd kr\u00fcpteeritud m\u00e4lu laadimisel ja dekr\u00fcpteeritakse ainult kasutamise hetkedel, j\u00e4\u00e4des muul ajal kr\u00fcpteerituks. Sellise l\u00e4henemise korral peab r\u00fcndaja, et edukalt taastada privaatv\u00f5ti, eelnevalt taastama juhuslikult genereeritud 16 KB vahepealse v\u00f5tme, mida kasutatakse p\u00f5hiv\u00f5tme kr\u00fcpteerimiseks, mis on t\u00e4nap\u00e4eva r\u00fcnnakute sageduse juures ebat\u00f5en\u00e4oline;\n<li class=\"l\"> V  <noindex><a rel=\"nofollow\" href=\"https:\/\/man.openbsd.org\/ssh-keygen.1\">ssh-keygen<\/a><\/noindex>  on lisatud katseala tugi lihtsustatud digitaalsete allkirjade loomise ja verifitseerimise skeemile. Digitaalseid allkirju saab luua tavaliste SSH-v\u00f5tmete abil, mis on salvestatud kettale v\u00f5i ssh-agenti, ning neid saab verifitseerida sarnase meetodi abil nagu authorized_keys <noindex><a rel=\"nofollow\" href=\"https:\/\/man.openbsd.org\/ssh-keygen.1#ALLOWED_SIGNERS\">lubatud v\u00f5tmete nimekiri<\/a><\/noindex>. Digitaalsesse allkirja on sisseehitatud teave nimespetsiifilisuse tagamiseks, et v\u00e4ltida segadust erinevates valdkondades (n\u00e4iteks e-posti ja failide puhul);\n<li class=\"l\"> ssh-keygen on automaatselt seadistatud kasutama algoritmi rsa-sha2-512 digitaalsete allkirjade sertifitseerimise jaoks RSA v\u00f5tme alusel (CA re\u017eiimis t\u00f6\u00f6tades). Sellised sertifikaadid ei \u00fchildu OpenSSH versioonidega enne 7.2 (\u00fchilduvuse tagamiseks tuleks algoritmi t\u00fc\u00fcpi \u00fcle kirjutada, n\u00e4iteks kutsega \u00abssh-keygen -t ssh-rsa -s ...\u00bb);\n<li class=\"l\"> ssh-s v\u00e4ljendis ProxyCommand on n\u00fc\u00fcd toetatud jaotust \u00ab%n\u00bb (kleebitakse aadressireale m\u00e4\u00e4ratud hostinime);\n<li class=\"l\"> ssh ja sshd kr\u00fcpteerimisalgoritmide loeteludes on n\u00fc\u00fcd soovitatavate vaikimisi algoritmide lisamiseks v\u00f5imalik kasutada s\u00fcmbolit \u00ab^\u00bb. N\u00e4iteks ssh-ed25519 lisamiseks vaikimisi loendisse saab m\u00e4\u00e4rata \u00abHostKeyAlgorithms ^ssh-ed25519\u00bb;\n<li class=\"l\"> ssh-keygen now outputs the comment attached to the key when extracting the public key from the private one;\n<li class=\"l\"> ssh-keygenis on lisatud v\u00f5imalus kasutada lippu \u00ab-v\u00bb v\u00f5tmeotsingute teostamisel (nt \u00abssh-keygen -vF host\u00bb), mille m\u00e4\u00e4ramine toob kaasa visuaalse hosti allkirja v\u00e4ljundi;\n<li class=\"l\"> Lisatud v\u00f5imalus kasutada <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/PKCS_8\">PKCS8<\/a><\/noindex> salvestamiseks erivormina privaatsete v\u00f5tmete jaoks kettal. Vaikimisi kasutatakse endiselt PEM-vormi, kuid PKCS8 v\u00f5ib olla kasulik, et tagada \u00fchilduvus kolmandate osapoolte rakendustega.\n<\/ul>\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=51640\">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 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 8.1, \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. \u041e\u0442\u0434\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u0432 \u043d\u043e\u0432\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 \u0437\u0430\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u0435\u0442 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0435\u0439 ssh, sshd, ssh-add \u0438 ssh-keygen. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043a\u043e\u0434\u0435 \u043f\u0430\u0440\u0441\u0438\u043d\u0433\u0430 \u0437\u0430\u043a\u0440\u044b\u0442\u044b\u0445 \u043a\u043b\u044e\u0447\u0435\u0439 \u0441 \u0442\u0438\u043f\u043e\u043c XMSS \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u0438\u043d\u0438\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u0435 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u0442\u043c\u0435\u0447\u0435\u043d\u0430 \u043a\u0430\u043a \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u0430\u044f, [&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-38754","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta 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Uue v\u00e4ljaande erilise t\u00e4helepanu all on haavatavuse k\u00f5rvaldamine, mis m\u00f5jutab ssh, sshd, ssh-add ja ssh-keygen. Probleem esineb privaatsete v\u00f5tmete XMSS-t\u00fc\u00fcpi parsimise koodis ja v\u00f5imaldab r\u00fcndajal k\u00e4ivitada t\u00e4isarvu \u00fclevoolu. 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