{"id":104673,"date":"2022-07-20T09:36:43","date_gmt":"2022-07-20T07:36:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel"},"modified":"2022-07-20T09:36:43","modified_gmt":"2022-07-20T07:36:43","slug":"opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel","title":{"rendered":"Publicada a ferramenta para descriptografar microc\u00f3digo da Intel","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Um grupo de pesquisadores de seguran\u00e7a da equipe uCode publicou os c\u00f3digos-fonte para descriptografar o microc\u00f3digo da Intel. A t\u00e9cnica Red Unlock, desenvolvida pelos mesmos pesquisadores em 2020, pode ser usada para extrair o microc\u00f3digo criptografado. A possibilidade proposta de descriptografar o microc\u00f3digo permite investigar a estrutura interna do microc\u00f3digo e os m\u00e9todos de implementa\u00e7\u00e3o das instru\u00e7\u00f5es de m\u00e1quina x86. Al\u00e9m disso, os pesquisadores recuperaram o formato das atualiza\u00e7\u00f5es de microc\u00f3digo, o algoritmo de criptografia e a chave usada para proteger o microc\u00f3digo (RC4). <\/p>\n

Para determinar a chave de criptografia utilizada, foi explorada uma vulnerabilidade no Intel TXE, atrav\u00e9s da qual foi poss\u00edvel ativar um modo de depura\u00e7\u00e3o n\u00e3o documentado, que os pesquisadores nomearam de \"Red Unlock\". No modo de depura\u00e7\u00e3o, foi poss\u00edvel carregar diretamente do CPU um dump do microc\u00f3digo em funcionamento e extrair dele o algoritmo e as chaves. <\/p>\n

A ferramenta permite apenas a descriptografia do microc\u00f3digo, mas n\u00e3o possibilita sua modifica\u00e7\u00e3o, uma vez que a integridade do microc\u00f3digo \u00e9 verificada por meio de uma assinatura digital baseada no algoritmo RSA. O m\u00e9todo \u00e9 aplic\u00e1vel aos processadores Intel da fam\u00edlia Gemini Lake, baseados na microarquitetura Goldmont Plus, e Intel Apollo Lake, baseados na microarquitetura Goldmont.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/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-104673","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\udd47 Publicada a ferramenta para descriptografar o microc\u00f3digo da Intel | ProHoster","description":"Um grupo de pesquisadores de seguran\u00e7a da equipe uCode publicou os c\u00f3digos-fonte para descriptografar o microc\u00f3digo da 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