{"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\/fr\/blog\/news\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","title":{"rendered":"Publication de OpenSSH 9.9 avec support pour l'algorithme de chiffrement post-quantique ML-KEM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>La publication d'OpenSSH 9.9, une impl\u00e9mentation ouverte du client et du serveur pour travailler avec les protocoles SSH 2.0 et SFTP, a eu lieu. Principales modifications :  <\/p>\n<ul>\n<li class=\"l\"> Dans ssh et sshd, un algorithme hybride d'\u00e9change de cl\u00e9s &#171;mlkem768x25519-sha256&#187; a \u00e9t\u00e9 ajout\u00e9, r\u00e9sistant aux attaques par ordinateurs quantiques, constituant une combinaison d'X25519 ECDH et de l'algorithme ML-KEM (CRYSTALS-Kyber), r\u00e9cemment normalis\u00e9 par l'Institut national des normes et de la technologie des \u00c9tats-Unis (NIST). ML-KEM utilise des m\u00e9thodes cryptographiques bas\u00e9es sur la r\u00e9solution de probl\u00e8mes de th\u00e9orie des r\u00e9seaux, dont le temps de r\u00e9solution ne diff\u00e8re pas entre les ordinateurs classiques et quantiques.\n<li class=\"l\"> Un mot-cl\u00e9 &#171;RefuseConnection&#187; a \u00e9t\u00e9 ajout\u00e9 au fichier de configuration sshd_config, ce qui entra\u00eenera l'arr\u00eat des connexions apr\u00e8s la premi\u00e8re tentative d'authentification. La directive PerSourcePenalties a \u00e9t\u00e9 enrichie d'une classe &#171;refuseconnection&#187;, qui s'applique lors de la terminaison de la connexion apr\u00e8s l'activation de &#171;RefuseConnection&#187;.\n<li class=\"l\"> Dans le client ssh, la prise en charge de la compression des donn\u00e9es avant l'authentification a \u00e9t\u00e9 arr\u00eat\u00e9e, ce qui augmente consid\u00e9rablement la surface d'attaque sur les serveurs SSH et cr\u00e9e des risques d'utilisation de m\u00e9thodes indirectes d'analyse des informations envoy\u00e9es lors du processus d'authentification. Dans <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/fr\/server\/dts-newyork\/\"   title=\"le serveur\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2785\">le serveur<\/a> sshd, la compression avant l'authentification avait d\u00e9j\u00e0 \u00e9t\u00e9 d\u00e9sactiv\u00e9e.\n<li class=\"l\"> Dans ssh et sshd, lors de l'analyse des arguments de la directive &#171;Match&#187;, des r\u00e8gles similaires \u00e0 celles du shell pour travailler avec des cha\u00eenes entre guillemets, permettant un encadrement imbriqu\u00e9 et des \u00e9chappements avec le caract\u00e8re &#171;&#092;&#187;, ont \u00e9t\u00e9 mises en \u0153uvre.\n<li class=\"l\"> Dans le fichier de configuration ssh_config, la directive &#171;Include&#187; prend d\u00e9sormais en charge les variables d'environnement et les substitutions &#171;%&#187;, tout comme dans la directive &#171;Match Exec&#187;.\n<li class=\"l\"> Dans sshd_config, l'option &#171;invalid-user&#187; a \u00e9t\u00e9 ajout\u00e9e \u00e0 la directive Match, qui s'active lors d'une tentative de connexion avec un nom d'utilisateur incorrect.\n<li class=\"l\"> Dans ssh et sshd, une mise en \u0153uvre plus rapide de l'algorithme &#171;Streamlined NTRUPrime&#187; a \u00e9t\u00e9 int\u00e9gr\u00e9e. Pour l'algorithme hybride d'\u00e9change de cl\u00e9s Streamlined NTRUPrime\/X25519, la possibilit\u00e9 d'utiliser le nom &#171;sntrup761x25519-sha512&#187; a \u00e9t\u00e9 ajout\u00e9e, en plus du nom sp\u00e9cifique \u00e0 SSH &#171;sntrup761x25519-sha512@openssh.com&#187;.\n<li class=\"l\"> Dans ssh, sshd et ssh-agent, une protection contre la persistance des cl\u00e9s priv\u00e9es dans les fichiers core a \u00e9t\u00e9 ajout\u00e9e, fonctionnant sous OpenBSD, Linux et FreeBSD.\n<li class=\"l\"> Le traitement des cl\u00e9s a \u00e9t\u00e9 transf\u00e9r\u00e9 \u00e0 l'utilisation de l'API EVP_PKEY, fournie par la biblioth\u00e8que libcrypto.\n<li class=\"l\"> Un changement al\u00e9atoire du d\u00e9lai de connexion (LoginGraceTime) de 4 secondes a \u00e9t\u00e9 ajout\u00e9 \u00e0 sshd pour compliquer la d\u00e9tection de l'expiration du d\u00e9lai.\n<li class=\"l\"> Les probl\u00e8mes de compilation avec la biblioth\u00e8que Musl ont \u00e9t\u00e9 r\u00e9solus.  <\/ul>\n<p>Source : <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61899\">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 \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 - 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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