{"id":182995,"date":"2026-08-14T10:53:40","date_gmt":"2026-08-14T08:53:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/obhod-izolyaczii-pamyati-na-sistemah-s-cpu-amd-cherez-manipulyaczii-s-kontrollerom-pamyati"},"modified":"2026-08-14T10:53:42","modified_gmt":"2026-08-14T08:53:42","slug":"bypassing-memory-isolation-on-amd-cpu-systems-via-memory-controller-manipulation","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/bypassing-memory-isolation-on-amd-cpu-systems-via-memory-controller-manipulation","title":{"rendered":"Obila\u017eenje izolacije memorije na sustavima s CPU AMD kroz manipulacije s kontrolerom memorije","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Na konferenciji Black Hat 2026 demonstriran je napad koriste\u0107i swizzle-mod kontrole memorije AMD za obila\u017eenje izolacije memorije i \u010ditanje ili pisanje proizvoljnih podataka iz memorije, uklju\u010duju\u0107i podru\u010dja s mikrokodom CPU i memoriju dodijeljenu PSP procesoru (Platform Security Processor). Ova metoda omogu\u0107uje zaobila\u017eenje integriranih mehanizama \u0161ifriranja memorije (AMD SME\/SEV), naru\u0161avanje izolacije virtualnih ma\u0161ina i prepisivanje mikrokoda procesora. Za manipulaciju s kontrolerom memorije potrebno je izvr\u0161avanje koda na razini jezgre, \u0161to smanjuje opasnost od prikazane tehnike napada. <\/p>\n

Na\u010din \"swizzle\" mijenja logiku adresiranja radne memorije kako bi se isklju\u010dili konflikti koji nastaju pri sekvencijalnom pristupu prilikom \u010ditanja iz razli\u010ditih redaka u jednoj memorijskoj banci. Kako bi se izbjegli takvi konflikti, kontroler u na\u010dinu \"swizzle\" primjenjuje XOR operaciju na dijelu bitova adrese kako bi razdvojio uzastopne blokove podataka po razli\u010ditim memorijskim bankama. Napad podrazumijeva manipulacije na\u010dinom \"swizzle\" na radnoj sistemu radi prebacivanja fizi\u010dkih adresa u hodu. <\/p>\n

Prototip napada demonstriran je na AMD procesorima obitelji 16h, kori\u0161tenim u konzolama PS4 i Xbox One, gdje su registri konfiguracije adresiranja kontrolera memorije bili dokumentirani i nije postojao mehanizam za njihovo blokiranje nakon pokretanja sustava. U procesorima AMD obitelji 17h i novijim (od Zen) AMD je implementirao mehanizam blokiranja pristupa registrima konfiguracije kontrolera memorije, kao i dodao za\u0161titu od izmjene kopije mikrokoda koja se resetira u radnu memoriju tijekom prelaska procesora u stanje mirovanja (C6).
\n
Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 Black Hat 2026 \u043f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d \u043c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0439 swizzle-\u0440\u0435\u0436\u0438\u043c \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u043e\u0432 \u043f\u0430\u043c\u044f\u0442\u0438 AMD \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u0447\u0442\u0435\u043d\u0438\u044f \u0438\u043b\u0438 \u0437\u0430\u043f\u0438\u0441\u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u043f\u0430\u043c\u044f\u0442\u0438, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u0441 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434\u043e\u043c CPU \u0438 \u043f\u0430\u043c\u044f\u0442\u044c, \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u0443\u044e PSP-\u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0443 (Platform Security Processor). \u041c\u0435\u0442\u043e\u0434 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0431\u043e\u0439\u0442\u0438 \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u044b\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 (AMD SME\/SEV), \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u044c \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044e \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u043c\u0430\u0448\u0438\u043d \u0438 \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430. \u0414\u043b\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-182995","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\n","aioseo_head_json":{"title":"\ud83e\udd47Obila\u017eenje izolacije memorije na sustavima s CPU AMD kroz manipulacije s kontrolerom memorije | ProHoster","description":"Na konferenciji Black Hat 2026 demonstriran je napad koriste\u0107i swizzle-mod kontrolora memorije AMD za obila\u017eenje izolacije memorije i \u010ditanje ili pisanje proizvoljnih podataka iz memorije, 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