{"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\/da\/blog\/news\/opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel","title":{"rendered":"Der er offentliggjort et v\u00e6rkt\u00f8j til dekryptering af Intel-mikrokode","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En gruppe sikkerhedsforskere fra uCode-teamet har offentliggjort kildekoderne til dekryptering af Intel-mikrokode. Teknikken Red Unlock, udviklet af de samme forskere i 2020, kan bruges til at udtr\u00e6kke den krypterede mikrokode. Den foresl\u00e5ede dekrypteringsmulighed giver mulighed for at unders\u00f8ge den indre struktur af mikrokoden og metoderne til implementering af maskininstruktioner x86. Derudover har forskerne gendannet formatet for opdateringer med mikrokode, krypteringsalgoritmen og n\u00f8glen, der blev brugt til at beskytte mikrokoden (RC4). <\/p>\n

For at bestemme den anvendte krypteringsn\u00f8gle blev der udnyttet en s\u00e5rbarhed i Intel TXE, hvilket gjorde det muligt at aktivere en ikke-dokumenteret fejls\u00f8gningsmode, som forskerne gav kodenavn «Red Unlock». I fejls\u00f8gningsmode kunne der direkte fra CPU'en hentes et dump af den k\u00f8rende mikrokode og udtr\u00e6kke algoritmen og n\u00f8glerne derfra. <\/p>\n

V\u00e6rkt\u00f8jet tillader kun dekryptering af mikrokoden, men giver ikke mulighed for \u00e6ndringer, da integriteten af mikrokoden desuden verificeres ved hj\u00e6lp af en digital signatur baseret p\u00e5 RSA-algoritmen. Metoden g\u00e6lder for Intel-processorer i Gemini Lake-familien baseret p\u00e5 mikroarkitekturen Goldmont Plus og Intel Apollo Lake baseret p\u00e5 mikroarkitekturen Goldmont.
\n
Kilde: 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\udd47Der er offentliggjort et v\u00e6rkt\u00f8j til dekryptering af Intel-mikrokode | ProHoster","description":"En gruppe sikkerhedsforskere fra uCode-teamet har offentliggjort kildekoderne til dekryptering af 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