{"id":119889,"date":"2024-09-20T21:43:01","date_gmt":"2024-09-20T19:43:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem"},"modified":"2024-09-20T21:43:01","modified_gmt":"2024-09-20T19:43:01","slug":"reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","title":{"rendered":"Lansarea OpenSSH 9.9 cu suport pentru algoritmul de criptare postcuantic\u0103 ML-KEM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A fost lansat\u0103 versiunea OpenSSH 9.9, o implementare deschis\u0103 a clientului \u0219i serverului pentru lucrul cu protocoalele SSH 2.0 \u0219i SFTP. Principalele modific\u0103ri:  <\/p>\n<ul>\n<li class=\"l\"> \u00cen ssh \u0219i sshd a fost ad\u0103ugat suportul pentru un algoritm hibrid de schimb de chei &#171;mlkem768x25519-sha256&#187;, rezistent la atacurile computa\u021bional cuantice \u0219i reprezent\u00e2nd o combina\u021bie \u00eentre X25519 ECDH \u0219i algoritmul ML-KEM (CRYSTALS-Kyber), standardizat recent de Institutul Na\u021bional de Standarde \u0219i Tehnologii al SUA (NIST). ML-KEM utilizeaz\u0103 metode de criptografie bazate pe solu\u021bionarea problemelor din teoria re\u021belelor, timpul de solu\u021bionare fiind similar pe computerele obi\u0219nuite \u0219i cele cuantice.\n<li class=\"l\"> \u00cen fi\u0219ierul de configurare sshd_config a fost ad\u0103ugat cuv\u00e2ntul cheie &#171;RefuseConnection&#187;, care, c\u00e2nd este activat, va \u00eencheia conexiunile dup\u0103 prima tentativ\u0103 de autentificare. \u00cen directiva PerSourcePenalties a fost ad\u0103ugat clasa &#171;refuseconnection&#187;, care se aplic\u0103 \u00een cazul \u00eencheierii conexiunii dup\u0103 activarea &#171;RefuseConnection&#187;.\n<li class=\"l\"> \u00cen clientul ssh a fost oprit suportul pentru comprimarea datelor \u00eenainte de trecerea prin autentificare, ceea ce cre\u0219te semnificativ suprafa\u021ba de atac asupra serverelor SSH \u0219i creeaz\u0103 riscuri privind utilizarea metodelor indirecte pentru analiza informa\u021biilor trimise \u00een timpul autentific\u0103rii. \u00cen <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/server\/dts-newyork\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2785\">server<\/a> sshd, compresia \u00eenainte de autentificare fusese de asemenea dezactivat\u0103 anterior.\n<li class=\"l\"> \u00cen ssh \u0219i sshd, la analiza argumentelor directivei &#171;Match&#187;, sunt utilizate reguli asem\u0103n\u0103toare celor din shell pentru manipularea \u0219irurilor \u00eentre ghilimele, care suport\u0103 \u00eencadrarea imbricat\u0103 \u0219i escaparea folosind simbolul &#171;&#092;&#187;.\n<li class=\"l\"> \u00cen fi\u0219ierul de configurare ssh_config, \u00een direc\u021bia &#171;Include&#187;, s-a asigurat suportul pentru variabilele de mediu \u0219i substitu\u021biile &#171;%&#187;, la fel ca \u00een directiva &#171;Match Exec&#187;.\n<li class=\"l\"> \u00cen sshd_config, \u00een directiva Match a fost ad\u0103ugat\u0103 op\u021biunea &#171;invalid-user&#187;, care se activeaz\u0103 la o \u00eencercare de conectare cu un nume de utilizator incorect.\n<li class=\"l\"> \u00cen ssh \u0219i sshd, a fost implementat\u0103 o versiune mai rapid\u0103 a algoritmului &#171;Streamlined NTRUPrime&#187;. Pentru algoritmul hibrid de schimb de chei Streamlined NTRUPrime\/X25519 a fost ad\u0103ugat\u0103 posibilitatea de a utiliza denumirea &#171;sntrup761x25519-sha512&#187;, pe l\u00e2ng\u0103 denumirea specific\u0103 pentru SSH &#171;sntrup761x25519-sha512@openssh.com&#187;.\n<li class=\"l\"> \u00cen ssh, sshd \u0219i ssh-agent a fost ad\u0103ugat\u0103 o protec\u021bie activ\u0103 \u00een OpenBSD, Linux \u0219i FreeBSD \u00eempotriva scurgerii cheilor private \u00een fi\u0219iere core.\n<li class=\"l\"> Procesarea cheilor a fost transformat\u0103 pentru a utiliza API-ul EVP_PKEY, oferit de biblioteca libcrypto.\n<li class=\"l\"> \u00cen sshd a fost ad\u0103ugat\u0103 o modificare aleatorie a intervalului de timp pentru conectare (LoginGraceTime) de p\u00e2n\u0103 la 4 secunde pentru a complica determinarea expir\u0103rii conect\u0103rii.\n<li class=\"l\"> Au fost rezolvate problemele legate de compilarea cu biblioteca Musl.  <\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61899\">opennet.ro<\/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 \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.9, \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: \u0412 ssh \u0438 sshd \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0433\u0438\u0431\u0440\u0438\u0434\u043d\u043e\u0433\u043e \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 \u043e\u0431\u043c\u0435\u043d\u0430 \u043a\u043b\u044e\u0447\u0430\u043c\u0438 &#171;mlkem768x25519-sha256&#187;, \u0441\u0442\u043e\u0439\u043a\u043e\u0433\u043e \u043a \u043f\u043e\u0434\u0431\u043e\u0440\u0443 \u043d\u0430 \u043a\u0432\u0430\u043d\u0442\u043e\u0432\u043e\u043c \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u0435 \u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0441\u043e\u0431\u043e\u0439 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044e \u0438\u0437 X25519 ECDH \u0438 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 ML-KEM (CRYSTALS-Kyber), \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u041d\u0430\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u043c \u0438\u043d\u0441\u0442\u0438\u0442\u0443\u0442\u043e\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 \u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0439 \u0421\u0428\u0410 [&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-119889","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.9, \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 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