{"id":184233,"date":"2026-11-12T11:41:15","date_gmt":"2026-11-12T09:41:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/udostoveryayushhij-czentr-emudhra-otozval-eshhyo-8-promezhutochnyh-kornevyh-sertifikatov"},"modified":"2026-11-12T11:41:21","modified_gmt":"2026-11-12T09:41:21","slug":"emudhra-certificate-authority-revokes-8-more-intermediate-root-certificates","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/emudhra-certificate-authority-revokes-8-more-intermediate-root-certificates","title":{"rendered":"A autoridade certificadora eMudhra revogou mais 8 certificados intermedi\u00e1rios de raiz","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A empresa eMudhra revelou mais detalhes relacionados ao incidente em que oito certificados raiz do centro de certifica\u00e7\u00e3o tinham chaves privadas facilmente acess\u00edveis, com apenas 1 byte de entropia em vez de 48. Al\u00e9m dos problemas com os certificados intermedi\u00e1rios raiz inicialmente identificados, mais 8 foram revogados, mas n\u00e3o devido a problemas de entropia. A an\u00e1lise mostrou que a fonte dos problemas de entropia foi um script em Python feito internamente, usado para transferir chaves privadas entre m\u00f3dulos de seguran\u00e7a de hardware (HSM) de diferentes fabricantes. A transfer\u00eancia das chaves foi necess\u00e1ria devido a atrasos na entrega de modelos HSM aprimorados que atendem aos novos requisitos para centros de certifica\u00e7\u00e3o. <\/p>\n

Devido a um erro, o tamanho das chaves privadas ECDSA foi reduzido para 1 byte. Al\u00e9m disso, durante a transfer\u00eancia das chaves entre os HSM, o script processava as chaves privadas na mem\u00f3ria vol\u00e1til do computador em que estava sendo executado, enquanto as opera\u00e7\u00f5es com chaves privadas devem ser realizadas apenas dentro do HSM. Os logs dos HSM confirmaram que os m\u00f3dulos de seguran\u00e7a funcionavam corretamente e que o problema foi causado pelo uso do script feito internamente. <\/p>\n

Al\u00e9m das chaves ECDSA, o script tamb\u00e9m foi usado para transferir 8 chaves RSA-4096, que n\u00e3o apresentavam problemas de entropia, mas o processamento das chaves na mem\u00f3ria comum viola os requisitos de seguran\u00e7a exigidos para centros de certifica\u00e7\u00e3o; portanto, os certificados RSA tamb\u00e9m foram revogados.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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