Foi publicado o lan\u00e7amento do OpenSSH 9.7, uma implementa\u00e7\u00e3o aberta do cliente e servidor para trabalhar com os protocolos SSH 2.0 e SFTP. A vers\u00e3o proposta introduziu mudan\u00e7as que antecedem a futura interrup\u00e7\u00e3o do suporte a chaves baseadas no algoritmo DSA. O OpenSSH 9.7 oferece a op\u00e7\u00e3o de desativar o DSA durante a compila\u00e7\u00e3o, mas a build padr\u00e3o ainda mant\u00e9m o suporte ao DSA. Na pr\u00f3xima vers\u00e3o, prevista para junho, o modo de constru\u00e7\u00e3o ser\u00e1 alterado para desativar o DSA por padr\u00e3o, e no in\u00edcio de 2025, a implementa\u00e7\u00e3o do DSA ser\u00e1 removida da base de c\u00f3digo. <\/p>\n
Por padr\u00e3o, o uso de chaves DSA foi encerrado em 2015, mas o c\u00f3digo para suporte a DSA ainda era compilado por padr\u00e3o e permitia reativar o DSA atrav\u00e9s de configura\u00e7\u00f5es. \u00c9 not\u00e1vel que o algoritmo DSA \u00e9 o \u00fanico obrigat\u00f3rio na implementa\u00e7\u00e3o do protocolo SSHv2. Essa exig\u00eancia foi inclu\u00edda porque, durante a cria\u00e7\u00e3o e aprova\u00e7\u00e3o do protocolo SSHv2, todos os algoritmos alternativos estavam sob patentes. Desde ent\u00e3o, a situa\u00e7\u00e3o mudou, as patentes relacionadas ao RSA expiraram, foi adicionado o algoritmo ECDSA, que possui desempenho e seguran\u00e7a significativamente superiores ao DSA, al\u00e9m do EdDSA, que \u00e9 mais seguro e r\u00e1pido que o ECDSA. <\/p>\n
O \u00fanico fator que mantinha o suporte ao DSA era a preserva\u00e7\u00e3o da compatibilidade com dispositivos legados. Nas condi\u00e7\u00f5es atuais, os custos de continuar a manuten\u00e7\u00e3o do algoritmo DSA inseguro n\u00e3o se justificam, e sua remo\u00e7\u00e3o permitir\u00e1 incentivar o fim do suporte ao DSA em outras implementa\u00e7\u00f5es de SSH e bibliotecas criptogr\u00e1ficas. <\/p>\n
Al\u00e9m das altera\u00e7\u00f5es relacionadas ao DSA, a nova vers\u00e3o prop\u00f5e um novo tipo de timeout no ssh e sshd, ativado atrav\u00e9s da defini\u00e7\u00e3o do valor «global» na diretiva ChannelTimeout. Nesse novo modo, o OpenSSH monitora todos os canais abertos e os fecha simultaneamente se n\u00e3o houver tr\u00e1fego em nenhum deles durante o per\u00edodo especificado. Por exemplo, quando h\u00e1 canais abertos para uma sess\u00e3o SSH e para redirecionamento x11 ao mesmo tempo, o novo modo permite fechar imediatamente ambos os canais se estiverem inativos, em vez de monitorar separadamente os timeouts de cada canal. Entre as mudan\u00e7as, destaca-se tamb\u00e9m uma melhoria significativa nos testes de compatibilidade com o projeto PuTTY. \u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.7, \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. \u0412 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u043d\u0430\u0447\u0430\u043b\u043e\u0441\u044c \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u043f\u0440\u0435\u0434\u0448\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0431\u0443\u0434\u0443\u0449\u0435\u043c\u0443 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u043a\u043b\u044e\u0447\u0435\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 DSA. \u0412 OpenSSH 9.7 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0430 \u043e\u043f\u0446\u0438\u044f \u0434\u043b\u044f \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f DSA \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438, \u043d\u043e \u0441\u0431\u043e\u0440\u043a\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 DSA \u043f\u043e\u043a\u0430 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0430. \u0412 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435, […]<\/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-114258","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Lan\u00e7amento do OpenSSH 9.7 | ProHoster","description":"Foi publicado o lan\u00e7amento do OpenSSH 9.7, uma implementa\u00e7\u00e3o aberta do cliente e servidor para trabalhar com os protocolos SSH 2.0 e 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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"