{"id":167221,"date":"2026-04-02T23:11:54","date_gmt":"2026-04-02T21:11:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-10-3"},"modified":"2026-04-04T11:22:40","modified_gmt":"2026-04-04T09:22:40","slug":"reliz-openssh-10-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/reliz-openssh-10-3","title":{"rendered":"Lan\u00e7amento do OpenSSH 10.3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ap\u00f3s seis meses de desenvolvimento, foi lan\u00e7ada a vers\u00e3o OpenSSH 10.3, uma implementa\u00e7\u00e3o de c\u00f3digo aberto do cliente e <a href=\"https:\/\/prohoster.info\/pt\/server\/\">servidor<\/a> para trabalhar com os protocolos SSH 2.0 e SFTP. Principais altera\u00e7\u00f5es:<\/p>\n<ul>\n<li class=\"l\">Uma vulnerabilidade foi corrigida, permitindo que um invasor que controla o nome de usu\u00e1rio enviado ao executar o utilit\u00e1rio ssh potencialmente execute comandos shell arbitr\u00e1rios. A vulnerabilidade se manifesta em sistemas que usam a substitui\u00e7\u00e3o '%u' em algumas diretivas do arquivo de configura\u00e7\u00e3o, como 'Match exec'. O problema \u00e9 causado pela verifica\u00e7\u00e3o de caracteres especiais no nome de usu\u00e1rio ap\u00f3s a execu\u00e7\u00e3o das substitui\u00e7\u00f5es %-no arquivo ssh_config.<\/li>\n<li class=\"l\">Um problema de seguran\u00e7a no sshd foi corrigido, causado por um mapeamento incorreto da op\u00e7\u00e3o authorized_keys principals=&lt;&lt; com a lista de nomes (principal) no certificado, em situa\u00e7\u00f5es onde os nomes incluem o caractere &#039;,&#039;. Para explorar a vulnerabilidade, \u00e9 necess\u00e1rio que a op\u00e7\u00e3o authorized_keys principals=&lt;&lt; contenha v\u00e1rios nomes e que a autoridade certificadora tenha emitido um certificado com v\u00e1rios nomes separados por v\u00edrgula (geralmente, isso n\u00e3o \u00e9 permitido). O comportamento em rela\u00e7\u00e3o a certificados com nomes vazios foi alterado \u2014 anteriormente, um nome vazio era considerado por todas as op\u00e7\u00f5es authorized_keys principals=&lt;&lt;, agora n\u00e3o \u00e9.<\/li>\n<li class=\"l\">No scp, um problema foi resolvido que impedia a remo\u00e7\u00e3o das flags setuid\/setgid ap\u00f3s o upload de um arquivo com permiss\u00f5es de root usando a op\u00e7\u00e3o '-O' e sem a op\u00e7\u00e3o '-p'.<\/li>\n<li class=\"l\">No sshd, um problema foi corrigido na manipula\u00e7\u00e3o de chaves ECDSA nas diretivas PubkeyAcceptedAlgorithms e HostbasedAcceptedAlgorithms, que fazia com que, ao especificar qualquer algoritmo ECDSA (por exemplo, 'ecdsa-sha2-nistp384'), todos os outros algoritmos baseados em ECDSA fossem aceitos tamb\u00e9m, mesmo que n\u00e3o estivessem explicitamente listados entre os permitidos.<\/li>\n<li class=\"l\">No ssh e sshd, ao interagir com agentes SSH, foi adicionada a compatibilidade com identificadores (codepoint) definidos pela IANA na especifica\u00e7\u00e3o draft-ietf-sshm-ssh-agent. O suporte para identificadores anteriormente utilizados do tipo '@openssh.com' foi mantido.<\/li>\n<li class=\"l\">No ssh-agent, foi implementada a extens\u00e3o 'query', definida na especifica\u00e7\u00e3o draft-ietf-sshm-ssh-agent, que permite determinar as funcionalidades suportadas pelo agente. Para consultar a lista de extens\u00f5es de protocolo suportadas, o comando 'query' teve a op\u00e7\u00e3o '-Q' adicionada ao utilit\u00e1rio ssh-add.<\/li>\n<li class=\"l\">No sshd_config, agora \u00e9 permitido especificar v\u00e1rios arquivos na diretiva RevokedKeys, e no ssh_config \u2014 na diretiva RevokedHostKeys.<\/li>\n<li class=\"l\">Foi adicionada ao ssh o comando de escape \"~I\" e a op\u00e7\u00e3o \"-O conninfo\" para mostrar informa\u00e7\u00f5es sobre a conex\u00e3o atual, bem como a op\u00e7\u00e3o \"-O channels\" para mostrar informa\u00e7\u00f5es sobre os canais abertos.<\/li>\n<li class=\"l\">No sshd, foi implementada na diretiva PerSourcePenalties a op\u00e7\u00e3o \u2018invaliduser\u2019 para adicionar um atraso em caso de tentativas de login com um usu\u00e1rio inexistente (por padr\u00e3o, 5 segundos). Adicionada a possibilidade de especificar valores de atraso n\u00e3o inteiros.<\/li>\n<li class=\"l\">No sshd, foi adicionada a op\u00e7\u00e3o GSSAPIDelegateCredentials para gerenciar a recep\u00e7\u00e3o de credenciais delegadas fornecidas pelo cliente.<\/li>\n<li class=\"l\">No ssh-keygen, foi adicionada a suporte para a grava\u00e7\u00e3o de chaves ED25519 no formato PKCS8.<\/li>\n<li class=\"l\">Adicionada a suporte para o esquema de assinaturas digitais ed25519, implementada atrav\u00e9s da libcrypto.<\/li>\n<\/ul>\n<p>Fonte: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65126\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u043f\u043e\u043b\u0443\u0433\u043e\u0434\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.3, \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: \u0423\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u044e\u0449\u0435\u043c\u0443 \u0438\u043c\u044f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f, \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0430\u0435\u043c\u043e\u0435 \u043f\u0440\u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0435 \u0443\u0442\u0438\u043b\u0438\u0442\u044b ssh, \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 shell-\u043a\u043e\u043c\u0430\u043d\u0434. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0445 \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0443 &#171;%u&#187; \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0434\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u0430\u0445 \u0444\u0430\u0439\u043b\u0430 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438, \u0442\u0430\u043a\u0438\u0445 \u043a\u0430\u043a &#171;Match exec&#187;. [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-167221","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=\"\u041f\u043e\u0441\u043b\u0435 \u043f\u043e\u043b\u0443\u0433\u043e\u0434\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.3, \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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SFTP.","og:url":"https:\/\/prohoster.info\/pt\/blog\/news\/reliz-openssh-10-3","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-04-02T21:11:54+00:00","article:modified_time":"2026-04-04T09:22:40+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/167221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/comments?post=167221"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/167221\/revisions"}],"predecessor-version":[{"id":167487,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/167221\/revisions\/167487"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/media?parent=167221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/categories?post=167221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/tags?post=167221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}