{"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\/pt\/blog\/news\/reliz-openssh-9-9-s-podderzhkoj-algoritma-postkvantovogo-shifrovaniya-ml-kem","title":{"rendered":"Lan\u00e7amento do OpenSSH 9.9 com suporte para o algoritmo de criptografia p\u00f3s-qu\u00e2ntica ML-KEM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Foi lan\u00e7ado o OpenSSH 9.9, uma implementa\u00e7\u00e3o de c\u00f3digo aberto do cliente e servidor para trabalhar com os protocolos SSH 2.0 e SFTP. Principais mudan\u00e7as:  <\/p>\n<ul>\n<li class=\"l\"> No ssh e sshd foi adicionada a suporte ao algoritmo h\u00edbrido de troca de chaves &#171;mlkem768x25519-sha256&#187;, resistente a ataques de computadores qu\u00e2nticos e que combina X25519 ECDH com o algoritmo ML-KEM (CRYSTALS-Kyber), recentemente padronizado pelo Instituto Nacional de Padr\u00f5es e Tecnologia dos EUA (NIST). O ML-KEM utiliza m\u00e9todos de criptografia baseados na resolu\u00e7\u00e3o de problemas da teoria de redes, cujo tempo de resolu\u00e7\u00e3o n\u00e3o difere entre computadores comuns e qu\u00e2nticos.\n<li class=\"l\"> Foi adicionada a palavra-chave &#171;RefuseConnection&#187; ao arquivo de configura\u00e7\u00e3o sshd_config, que far\u00e1 com que o sshd encerre as conex\u00f5es ap\u00f3s a primeira tentativa de autentica\u00e7\u00e3o. A diretiva PerSourcePenalties agora inclui a classe &#171;refuseconnection&#187;, aplicada ao encerrar uma conex\u00e3o ap\u00f3s a ativa\u00e7\u00e3o da &#171;RefuseConnection&#187;.\n<li class=\"l\"> O cliente ssh encerrou o suporte \u00e0 compress\u00e3o de dados antes da autentica\u00e7\u00e3o, que aumenta significativamente a superf\u00edcie de ataque aos servidores SSH e cria riscos de uso de m\u00e9todos indiretos para an\u00e1lise das informa\u00e7\u00f5es enviadas durante a autentica\u00e7\u00e3o. No <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-newyork\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2785\">servidor<\/a> sshd, a compress\u00e3o antes da autentica\u00e7\u00e3o j\u00e1 havia sido desligada.\n<li class=\"l\"> No ssh e sshd, na an\u00e1lise dos argumentos da diretiva &#171;Match&#187;, foram implementadas regras semelhantes \u00e0s de shell para trabalhar com strings entre aspas, suportando delimita\u00e7\u00e3o aninhada e escapes utilizando o caractere &#171;&#092;&#187;.\n<li class=\"l\"> No arquivo de configura\u00e7\u00e3o ssh_config, a diretiva &#171;Include&#187; agora suporta vari\u00e1veis de ambiente e substitui\u00e7\u00f5es &#171;%&#187;, assim como na diretiva &#171;Match Exec&#187;.\n<li class=\"l\"> No sshd_config, a diretiva Match agora inclui a op\u00e7\u00e3o &#171;invalid-user&#187;, que \u00e9 ativada quando h\u00e1 uma tentativa de login com um nome de usu\u00e1rio incorreto.\n<li class=\"l\"> No ssh e sshd, foi implementada uma vers\u00e3o mais r\u00e1pida do algoritmo &#171;Streamlined NTRUPrime&#187;. Para o algoritmo h\u00edbrido de troca de chaves Streamlined NTRUPrime\/X25519, foi adicionada a possibilidade de usar o nome &#171;sntrup761x25519-sha512&#187;, al\u00e9m do nome espec\u00edfico para SSH &#171;sntrup761x25519-sha512@openssh.com&#187;.\n<li class=\"l\"> No ssh, sshd e ssh-agent, foi implementada uma prote\u00e7\u00e3o contra a acumula\u00e7\u00e3o de chaves privadas em core dumps, funcionando no OpenBSD, Linux e FreeBSD.\n<li class=\"l\"> O processamento de chaves foi transferido para o uso da API EVP_PKEY, fornecida pela biblioteca libcrypto.\n<li class=\"l\"> No sshd foi adicionada uma altera\u00e7\u00e3o aleat\u00f3ria no tempo limite de conex\u00e3o (LoginGraceTime) dentro de 4 segundos para dificultar a determina\u00e7\u00e3o do t\u00e9rmino do tempo limite.\n<li class=\"l\"> Os problemas com a constru\u00e7\u00e3o da biblioteca Musl foram resolvidos.  <\/ul>\n<p>Fonte: <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 5.0.3 - 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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