{"id":121855,"date":"2025-02-12T02:22:04","date_gmt":"2025-02-12T00:22:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-openssl-3-4-1-s-ustraneniem-uyazvimostej"},"modified":"2025-02-12T02:22:04","modified_gmt":"2025-02-12T00:22:04","slug":"obnovlenie-openssl-3-4-1-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/obnovlenie-openssl-3-4-1-s-ustraneniem-uyazvimostej","title":{"rendered":"Atualiza\u00e7\u00e3o OpenSSL 3.4.1 com corre\u00e7\u00f5es de vulnerabilidades","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Est\u00e3o dispon\u00edveis lan\u00e7amentos de corre\u00e7\u00e3o da biblioteca de criptografia OpenSSL 3.0.16, 3.1.8, 3.2.4, 3.3.3 e 3.4.1. Nas vers\u00f5es 3.2.4, 3.3.3 e 3.4.1, uma vulnerabilidade (CVE-2024-12797) com alto n\u00edvel de criticidade foi corrigida. A vulnerabilidade permite a realiza\u00e7\u00e3o de um ataque MITM em conex\u00f5es TLS e DTLS. O problema ocorre apenas em sistemas que utilizam chaves p\u00fablicas RPK (Raw Public Key, RFC 7250) para autentica\u00e7\u00e3o de clientes. Por padr\u00e3o, o suporte a RPK est\u00e1 desativado no lado do cliente e servidor<\/a>. <\/p>\n

A vulnerabilidade \u00e9 causada pelo fato de que o OpenSSL n\u00e3o retorna informa\u00e7\u00f5es ao cliente sobre a falha na autentica\u00e7\u00e3o do servidor ao estabelecer uma conex\u00e3o usando o modo de verifica\u00e7\u00e3o SSL_VERIFY_PEER, j\u00e1 que o processo de negocia\u00e7\u00e3o da conex\u00e3o n\u00e3o \u00e9 encerrado corretamente. Um atacante pode realizar um ataque MITM e redirecionar o tr\u00e1fego para seu pr\u00f3prio host em vez do servidor de destino, e o cliente n\u00e3o receber\u00e1 a informa\u00e7\u00e3o de que servidor<\/a> n\u00e3o foi autenticado. O problema ocorre a partir da vers\u00e3o OpenSSL 3.2, na qual foi introduzida a possibilidade de usar RPK em vez de certificados X.509. <\/p>\n

Al\u00e9m disso, as atualiza\u00e7\u00f5es do OpenSSL corrigiram a vulnerabilidade CVE-2024-13176, que permite um ataque por canais laterais para reconstruir a chave privada ECDSA atrav\u00e9s da an\u00e1lise de atrasos que ocorrem durante a gera\u00e7\u00e3o da assinatura digital. A ess\u00eancia da vulnerabilidade \u00e9 que, para alguns tipos de curvas el\u00edpticas, como NIST P-521, \u00e9 poss\u00edvel destacar da massa geral os c\u00e1lculos com bits superiores nulos do valor inverso do vetor de inicializa\u00e7\u00e3o (nonce), cujo tempo de processamento difere em 300 nanossegundos. <\/p>\n

No caso do ECDSA, a determina\u00e7\u00e3o de mesmo alguns bits com informa\u00e7\u00f5es sobre o vetor de inicializa\u00e7\u00e3o \u00e9 suficiente para realizar um ataque de recupera\u00e7\u00e3o sequencial de toda a chave privada. Para que o ataque seja bem-sucedido, o invasor deve ter acesso ao sistema local onde o aplicativo que gera assinaturas digitais est\u00e1 sendo executado, ou acesso a uma rede de alta velocidade ao aplicativo com lat\u00eancias muito baixas. O atacante tamb\u00e9m deve ser capaz de analisar com grande precis\u00e3o o tempo de gera\u00e7\u00e3o de um grande n\u00famero de assinaturas digitais, criadas sobre dados que ele conhece.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 OpenSSL 3.0.16, 3.1.8, 3.2.4, 3.3.3 \u0438 3.4.1. \u0412 \u0432\u0435\u0440\u0441\u0438\u044f\u0445 3.2.4, 3.3.3 \u0438 3.4.1 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-12797), \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c MITM-\u0430\u0442\u0430\u043a\u0443 \u043d\u0430 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f TLS \u0438 DTLS. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0445 \u0434\u043b\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0435 \u043a\u043b\u044e\u0447\u0438 RPK (Raw Public Key, RFC 7250). \u041f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 […]<\/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-121855","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\udd47Atualiza\u00e7\u00e3o do OpenSSL 3.4.1 com corre\u00e7\u00e3o de vulnerabilidades | ProHoster","description":"Est\u00e3o dispon\u00edveis lan\u00e7amentos de corre\u00e7\u00e3o da biblioteca de criptografia OpenSSL 3.0.16, 3.1.8, 3.2.4, 3.3.3 e 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