{"id":116935,"date":"2024-07-04T15:05:10","date_gmt":"2024-07-04T13:05:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/indirector-novaya-mikroarhitekturnaya-ataka-zatragivayushhaya-cpu-intel-raptor-lake-i-alder-lake"},"modified":"2024-07-04T15:05:10","modified_gmt":"2024-07-04T13:05:10","slug":"indirector-novaya-mikroarhitekturnaya-ataka-zatragivayushhaya-cpu-intel-raptor-lake-i-alder-lake","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/indirector-novaya-mikroarhitekturnaya-ataka-zatragivayushhaya-cpu-intel-raptor-lake-i-alder-lake","title":{"rendered":"Indirector \u2014 uus mikroarhitektuurne r\u00fcnnak, mis m\u00f5jutab Intel Raptor Lake ja Alder Lake CPU-sid.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Kalifornia \u00dclikooli San Diegos teadlased esitlesid uut meetodit Intel'i protsessorite mikroarhitektuuride r\u00fcnnakuks, mis on rakendatav muu hulgas Raptor Lake'i ja Alder Lake'i mikroarhitektuuril p\u00f5hinevate CPU-de puhul. R\u00fcnnak, mille koodnimi on Indirector, v\u00f5imaldab m\u00f5jutada spekulatiivsete k\u00e4skude t\u00e4itmise kulgu teistes protsessides ja teistes privileegitasemetes (n\u00e4iteks tuumas v\u00f5i teises virtuaalmasinas), mis k\u00e4ivituvad CPU \u00fches l\u00f5imes r\u00fcndaja koodiga. Meetodi demonstreerimiseks on v\u00e4lja t\u00f6\u00f6tatud eksploidimisseade, mis v\u00f5imaldab m\u00e4\u00e4rata m\u00e4lu aadresside jaotuse ASLR (Address Space Layout Randomization) kaitsemehhanismi \u00fcletamiseks. Samuti on avaldatud MIT litsentsi alusel t\u00f6\u00f6riistakomplekt, mis on loodud mikroarhitektuurilise CPU loogika anal\u00fc\u00fcsimiseks ja tagasij\u00f5udmiseks. <\/p>\n

Proponitud on kaks r\u00fcnnaku korraldamise meetodit. Esimene meetod p\u00f5hineb IBP (Indirect Branch Predictor) indirektsete h\u00fcpetega seonduvate sisu moonutamisel, mis on kasutusel indekseerimise ennustamiseks olukordades, kus \u00fcleminekuaadress v\u00f5i nihke v\u00e4\u00e4rtus pole veel teada ja arvutatakse h\u00fcppeinstruktsioonide eelnevalt t\u00e4idetud k\u00e4skudes. Teine meetod puudutab BTB (Branch Target Buffer) h\u00fcppe ennustamise puhvrisse, mis sis\u00e4ltab teavet hiljutiste h\u00fcpete kohta.<\/p>\n

\"Indirector<\/center><\/p>\n

\"Indirector<\/center><\/p>\n

Avastatud haavatavused v\u00f5imaldavad r\u00fcndajal m\u00e4\u00e4rata IBP ja BTB puhverdes olevate h\u00fcpete aadresside sisu, mis on kasutusel kolmandate osapoolte protsessides, ning teostada suvalise h\u00fcppe aadressi asendamist puhverdaatade tabelis. Selle tulemusena v\u00f5ib r\u00fcndaja suunata kolmanda osapoole protsessi t\u00e4itmise voolu soovitud aadressile m\u00e4lu spikulatiivse k\u00e4skude t\u00e4itmise k\u00e4igus. P\u00e4rast vale ennustuse m\u00e4\u00e4ramist l\u00fckatakse spekulatiivse t\u00e4itmise tulemus k\u00f5rvale, kuid aadressid ja andmed, mis on spikulatiivse k\u00e4itamise protsessis m\u00e4lust loetud, j\u00e4\u00e4vad vahem\u00e4llu ja neid saab tagasi saada, kasutades \u00fchte vahem\u00e4lu sisu m\u00e4\u00e4ramise meetodit, mis p\u00f5hineb vahem\u00e4lule ja mitte-vahem\u00e4lule juurdep\u00e4\u00e4su ajavahe anal\u00fc\u00fcsil. T\u00e4psete indirektsete h\u00fcpete aadresside m\u00e4\u00e4ramine v\u00f5imaldab n\u00e4iteks ASLR kaitsemehhanismi \u00fcletada.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u041a\u0430\u043b\u0438\u0444\u043e\u0440\u043d\u0438\u0439\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u0432 \u0421\u0430\u043d-\u0414\u0438\u0435\u0433\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043d\u044b\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel, \u043f\u0440\u0438\u043c\u0435\u043d\u0438\u043c\u044b\u0439 \u0441\u0440\u0435\u0434\u0438 \u043f\u0440\u043e\u0447\u0435\u0433\u043e \u043a CPU \u043d\u0430 \u0431\u0430\u0437\u0435 \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440 Raptor Lake \u0438 Alder Lake. \u0410\u0442\u0430\u043a\u0430, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u0430 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f Indirector, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0445\u043e\u0434\u0430 \u0441\u043f\u0435\u043a\u0443\u043b\u044f\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0439 \u0432 \u0434\u0440\u0443\u0433\u0438\u0445 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430\u0445 \u0438 \u043d\u0430 \u0434\u0440\u0443\u0433\u0438\u0445 \u0443\u0440\u043e\u0432\u043d\u044f\u0445 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432 \u044f\u0434\u0440\u0435 \u0438\u043b\u0438 \u0434\u0440\u0443\u0433\u043e\u0439 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":116936,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-116935","post","type-post","status-publish","format-standard","has-post-thumbnail","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\udd47Indirector \u2014 uus mikroarhitektuuri r\u00fcnnak, mis m\u00f5jutab Intel Raptor Lake ja Alder Lake CPU-sid | ProHoster","description":"California \u00fclikooli San Diegos teadlased esitasid uue r\u00fcnnakumeetodi Intel'i mikroarhitektuuri struktuuride vastu, mis on rakendatav muu hulgas Raptor Lake 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