{"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\/nl\/blog\/news\/opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel","title":{"rendered":"Toolkit voor het decoderen van Intel-microcode uitgebracht.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Een groep beveiligingsonderzoekers van het uCode-team heeft de broncodes gepubliceerd voor het decoderen van de Intel-microcode. De Red Unlock-techniek, ontwikkeld door dezelfde onderzoekers in 2020, kan worden gebruikt om de versleutelde microcode te extraheren. De voorgestelde decoderingmogelijkheid maakt het mogelijk om de interne structuur van de microcode en de methoden voor de implementatie van x86-machine-instructies te onderzoeken. Bovendien hebben de onderzoekers het formaat van de microcode-updates, het versleutelingsalgoritme en de sleutel die werd gebruikt om de microcode te beschermen (RC4) hersteld. <\/p>\n

Voor het bepalen van de gebruikte versleutelingssleutel werd een kwetsbaarheid in Intel TXE benut, waarmee een niet gedocumenteerde debugmodus geactiveerd kon worden, die door onderzoekers de codenaam 'Red Unlock' kreeg. In de debugmodus kon er rechtstreeks vanuit de CPU een dump worden geladen met de actieve microcode, en kon het algoritme en de sleutels eruit worden gehaald. <\/p>\n

De toolkit kan alleen de microcode decoderen, maar biedt geen mogelijkheid om deze te wijzigen, omdat de integriteit van de microcode aanvullend wordt gecontroleerd met behulp van een digitale handtekening op basis van het RSA-algoritme. Deze methode is toepasbaar op Intel-processoren van de Gemini Lake-familie, die zijn gebaseerd op de Goldmont Plus-microarchitectuur, en op Intel Apollo Lake-processoren, die zijn gebaseerd op de Goldmont-microarchitectuur.
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Bron: 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 Toolkit voor het decoderen van Intel-microcode vrijgegeven | ProHoster","description":"Een groep beveiligingsonderzoekers van het uCode-team heeft de broncodes gepubliceerd voor het decoderen van de 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