{"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\/sv\/blog\/news\/opublikovan-instrumentarij-dlya-deshifrovki-mikrokoda-intel","title":{"rendered":"Verktyg f\u00f6r dekryptering av Intel-mikrokod har publicerats","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En grupp s\u00e4kerhetsforskare fr\u00e5n uCode-teamet har publicerat k\u00e4llkoder f\u00f6r avkodning av Intels mikroprogram. Tekniken Red Unlock, som utvecklades av samma forskare 2020, kan anv\u00e4ndas f\u00f6r att extrahera det krypterade mikroprogrammet. Den f\u00f6reslagna m\u00f6jligheten att avkoda mikroprogrammet g\u00f6r det m\u00f6jligt att unders\u00f6ka den interna strukturen av mikroprogrammet och metoder f\u00f6r implementering av x86-maskininstruktioner. Dessutom har forskarna \u00e5terst\u00e4llt formatet f\u00f6r uppdateringar av mikroprogram, krypteringsalgoritmen och nyckeln som anv\u00e4ndes f\u00f6r att skydda mikroprogrammet (RC4). <\/p>\n

F\u00f6r att best\u00e4mma den anv\u00e4nda krypteringsnyckeln utnyttjades en s\u00e5rbarhet i Intel TXE, vilket m\u00f6jliggjorde aktiveringen av ett icke-dokumenterat fels\u00f6kningsl\u00e4ge, som forskarna gav kodnamnet \"Red Unlock\". I fels\u00f6kningsl\u00e4get kunde en dump av den k\u00f6rande mikrokoden laddas direkt fr\u00e5n CPU:n och algoritmen och nycklarna extraheras fr\u00e5n den. <\/p>\n

Verktyget till\u00e5ter endast avkodning av mikroprogrammet, men ger ingen m\u00f6jlighet till \u00e4ndringar, eftersom integriteten hos mikroprogrammet ytterligare verifieras med hj\u00e4lp av en digital signatur baserad p\u00e5 RSA-algoritmen. Metoden \u00e4r till\u00e4mplig p\u00e5 Intel-processorer av Gemini Lake-familjen baserade p\u00e5 mikroarkitekturen Goldmont Plus och Intel Apollo Lake baserade p\u00e5 mikroarkitekturen Goldmont.
\n
K\u00e4lla: 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 Verktyg f\u00f6r avkodning av Intels mikroprogram publicerat | ProHoster","description":"En grupp s\u00e4kerhetsforskare fr\u00e5n uCode-teamet har publicerat k\u00e4llkoder f\u00f6r avkodning av Intels 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