{"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\/sk\/blog\/news\/opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel","title":{"rendered":"Bol zverejnen\u00fd n\u00e1stroj na de\u0161ifrovanie mikrok\u00f3du Intel","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Skupina bezpe\u010dnostn\u00edch v\u00fdzkumn\u00edk\u016f z t\u00fdmu uCode zve\u0159ejnila zdrojov\u00e9 k\u00f3dy pro de\u0161ifrov\u00e1n\u00ed mikroprogramu Intel. Pro extrakci za\u0161ifrovan\u00e9ho mikroprogramu m\u016f\u017ee b\u00fdt pou\u017eita technika Red Unlock, kterou tyt\u00e9\u017e v\u00fdzkumn\u00edci vyvinuli v roce 2020. Navrhovan\u00e1 mo\u017enost de\u0161ifrov\u00e1n\u00ed mikroprogramu umo\u017e\u0148uje prozkoumat vnit\u0159n\u00ed strukturu mikroprogramu a metody realizace strojov\u00fdch instrukc\u00ed x86. Krom\u011b toho v\u00fdzkumn\u00edci obnovili form\u00e1t aktualizac\u00ed s mikroprogramem, algoritmus \u0161ifrov\u00e1n\u00ed a kl\u00ed\u010d pou\u017eit\u00fd k ochran\u011b mikroprogramu (RC4). <\/p>\n

Na ur\u010denie pou\u017eit\u00e9ho \u0161ifrovacieho k\u013e\u00fa\u010da bola vyu\u017eit\u00e1 zranite\u013enos\u0165 v Intel TXE, pomocou ktorej sa podarilo aktivova\u0165 nedokumentovan\u00fd lad\u00edci re\u017eim, ktor\u00e9mu v\u00fdskumn\u00edci priradili k\u00f3dov\u00e9 meno \u201eRed Unlock\u201c. V lad\u00edcom re\u017eime bolo mo\u017en\u00e9 priamo z CPU na\u010d\u00edta\u0165 dump s akt\u00edvnym mikroprogramom a extrahova\u0165 z neho algoritmus a k\u013e\u00fa\u010de. <\/p>\n

N\u00e1stroj umo\u017e\u0148uje pouze de\u0161ifrovat mikroprogram, ale nenab\u00edz\u00ed mo\u017enost jeho \u00fapravy, nebo\u0165 integrita mikroprogramu je nav\u00edc kontrolov\u00e1na pomoc\u00ed digit\u00e1ln\u00edho podpisu na z\u00e1klad\u011b algoritmu RSA. Metoda je pou\u017eiteln\u00e1 pro procesory Intel rodiny Gemini Lake na b\u00e1zi mikroarchitektury Goldmont Plus a Intel Apolo Lake na b\u00e1zi mikroarchitektury Goldmont.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0413\u0440\u0443\u043f\u043f\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438\u0437 \u043a\u043e\u043c\u0430\u043d\u0434\u044b uCode \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0442\u0435\u043a\u0441\u0442\u044b \u0434\u043b\u044f \u0434\u0435\u0448\u0438\u0444\u0440\u043e\u0432\u043a\u0438 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434\u0430 Intel. \u0414\u043b\u044f \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u044f \u0437\u0430\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434\u0430 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0442\u0435\u0445\u043d\u0438\u043a\u0430 Red Unlock, 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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\udd47Zve\u0159ejn\u011bn n\u00e1stroj pro de\u0161ifrov\u00e1n\u00ed mikroprogramu Intel | ProHoster","description":"Skupina bezpe\u010dnostn\u00edch v\u00fdzkumn\u00edk\u016f z t\u00fdmu uCode zve\u0159ejnila zdrojov\u00e9 k\u00f3dy pro de\u0161ifrov\u00e1n\u00ed mikroprogramu 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