{"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\/pl\/blog\/news\/opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel","title":{"rendered":"Opublikowano narz\u0119dzie do deszyfrowania mikrokodu Intel","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Zesp\u00f3\u0142 badaczy z grupy uCode opublikowa\u0142 kody \u017ar\u00f3d\u0142owe do dekodowania mikroprogramu Intel. Do wydobywania zaszyfrowanego mikroprogramu mo\u017cna wykorzysta\u0107 technik\u0119 Red Unlock, opracowan\u0105 przez tych samych badaczy w 2020 roku. Proponowana mo\u017cliwo\u015b\u0107 dekodowania mikroprogramu pozwala na badanie wewn\u0119trznej struktury mikroprogramu oraz metod realizacji instrukcji maszynowych x86. Dodatkowo, badacze odtworzyli format aktualizacji z mikroprogramem, algorytm szyfrowania i klucz, kt\u00f3ry zosta\u0142 u\u017cyty do ochrony mikroprogramu (RC4). <\/p>\n

Do okre\u015blenia u\u017cywanego klucza szyfrowania wykorzystano luk\u0119 w Intel TXE, dzi\u0119ki kt\u00f3rej uda\u0142o si\u0119 aktywowa\u0107 niedokumentowany tryb debugowania, kt\u00f3remu badacze nadali kodow\u0105 nazw\u0119 \"Red Unlock\". W trybie debugowania bezpo\u015brednio z CPU uda\u0142o si\u0119 za\u0142adowa\u0107 zrzut dzia\u0142aj\u0105cego mikrokodu i wydoby\u0107 z niego algorytm i klucze. <\/p>\n

Narz\u0119dzie pozwala tylko na dekodowanie mikroprogramu, ale nie daje mo\u017cliwo\u015bci jego zmiany, poniewa\u017c integralno\u015b\u0107 mikroprogramu dodatkowo weryfikowana jest za pomoc\u0105 podpisu cyfrowego opartego na algorytmie RSA. Metoda ta jest stosowana w procesorach Intel z rodziny Gemini Lake opartych na mikroarchitekturze Goldmont Plus oraz Intel Apollo Lake opartych na mikroarchitekturze Goldmont.
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\u0179r\u00f3d\u0142o: 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\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\udd47Opublikowano narz\u0119dzie do dekodowania mikroprogramu Intel | ProHoster","description":"Zesp\u00f3\u0142 badaczy z grupy uCode opublikowa\u0142 kody \u017ar\u00f3d\u0142owe do dekodowania mikroprogramu 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