{"id":104811,"date":"2022-08-11T03:36:41","date_gmt":"2022-08-11T01:36:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/aepic-leak-ataka-privodyashhaya-k-utechke-klyuchej-iz-anklavov-intel-sgx"},"modified":"2022-08-11T03:36:41","modified_gmt":"2022-08-11T01:36:41","slug":"aepic-leak-ataka-privodyashhaya-k-utechke-klyuchej-iz-anklavov-intel-sgx","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/aepic-leak-ataka-privodyashhaya-k-utechke-klyuchej-iz-anklavov-intel-sgx","title":{"rendered":"AEPIC Leak \u2014 \u00fatok vedouc\u00ed k \u00faniku kl\u00ed\u010d\u016f z enclaves Intel SGX","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byly odhaleny informace o nov\u00e9m \u00fatoku na procesory Intel \u2014 AEPIC Leak (CVE-2022-21233), kter\u00fd vede k \u00faniku citliv\u00fdch dat z izolovan\u00fdch enkl\u00e1v Intel SGX (Software Guard eXtensions). Probl\u00e9m se t\u00fdk\u00e1 procesor\u016f Intel 10., 11. a 12. generace (v\u010detn\u011b nov\u00fdch \u0159ad Ice Lake a Alder Lake) a je zp\u016fsoben architektonickou chybou, kter\u00e1 umo\u017e\u0148uje p\u0159\u00edstup k neinicializovan\u00fdm dat\u016fm z\u016fstan\u00fdm v registrech APIC (Advanced Programmable Interrupt Controller) po proveden\u00ed p\u0159edchoz\u00edch operac\u00ed. <\/p>\n

Na rozd\u00edl od \u00fatok\u016f typu Spectre doch\u00e1z\u00ed k \u00faniku v AEPIC Leak bez pou\u017eit\u00ed metod obnovy p\u0159es bo\u010dn\u00ed kan\u00e1ly \u2014 informace o citliv\u00fdch datech jsou p\u0159ed\u00e1v\u00e1ny p\u0159\u00edmo prost\u0159ednictv\u00edm zp\u0159\u00edstupn\u011bn\u00ed obsahu registr\u016f, odra\u017een\u00e9ho na str\u00e1nce pam\u011bti MMIO (memory-mapped I\/O). Obecn\u011b \u00fatok umo\u017e\u0148uje ur\u010dit data p\u0159en\u00e1\u0161en\u00e1 mezi cache druh\u00e9 a posledn\u00ed \u00farovn\u011b, v\u010detn\u011b obsahu registr\u016f a v\u00fdsledk\u016f operac\u00ed \u010dten\u00ed z pam\u011bti, kter\u00e9 byly p\u0159edt\u00edm zpracov\u00e1v\u00e1ny na tomt\u00e9\u017e j\u00e1dru CPU. <\/p>\n

Jeliko\u017e pro proveden\u00ed \u00fatoku je nutn\u00fd p\u0159\u00edstup k fyzick\u00fdm str\u00e1nk\u00e1m APIC MMIO, tj. vy\u017eaduje administr\u00e1torsk\u00e9 opr\u00e1vn\u011bn\u00ed, je metoda omezena na \u00fatoky na enkl\u00e1vy SGX, k nim\u017e administr\u00e1tor nem\u00e1 p\u0159\u00edm\u00fd p\u0159\u00edstup. V\u00fdzkumn\u00edci vyvinuli n\u00e1stroje, kter\u00e9 b\u011bhem n\u011bkolika sekund umo\u017e\u0148uj\u00ed ur\u010dit ulo\u017een\u00e9 v SGX kl\u00ed\u010de AES-NI a RSA, stejn\u011b jako atesta\u010dn\u00ed kl\u00ed\u010de Intel SGX a parametry gener\u00e1toru pseudon\u00e1hodn\u00fdch \u010d\u00edsel. K\u00f3d pro proveden\u00ed \u00fatoku byl zve\u0159ejn\u011bn na GitHubu. <\/p>\n

Spole\u010dnost Intel ozn\u00e1mila p\u0159\u00edpravu opravy ve form\u011b aktualizace mikro k\u00f3du, kter\u00e1 implementuje podporu pro vy\u010di\u0161t\u011bn\u00ed buffer\u016f a p\u0159id\u00e1v\u00e1 dal\u0161\u00ed opat\u0159en\u00ed na ochranu dat enkl\u00e1v. Tak\u00e9 byl p\u0159ipraven nov\u00fd vyd\u00e1n\u00ed SDK pro Intel SGX se zm\u011bnami, kter\u00e9 zabra\u0148uj\u00ed \u00fanik\u016fm dat. V\u00fdvoj\u00e1\u0159\u016fm opera\u010dn\u00edch syst\u00e9m\u016f a hypervizor\u016f bylo doporu\u010deno pou\u017e\u00edvat m\u00edsto zastaral\u00e9ho re\u017eimu xAPIC re\u017eim x2APIC, ve kter\u00e9m pro p\u0159\u00edstup k registr\u016fm APIC m\u00edsto MMIO pou\u017e\u00edvaj\u00ed MSR registry.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u043d\u043e\u0432\u043e\u0439 \u0430\u0442\u0430\u043a\u0435 \u043d\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b Intel — AEPIC Leak (CVE-2022-21233), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0430\u043d\u043a\u043b\u0430\u0432\u043e\u0432 Intel SGX (Software Guard eXtensions). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 10, 11 \u0438 12 \u043f\u043e\u043a\u043e\u043b\u0435\u043d\u0438\u044f CPU Intel (\u0432\u043a\u043b\u044e\u0447\u0430\u044f \u043d\u043e\u0432\u044b\u0435 \u0441\u0435\u0440\u0438\u0438 Ice Lake \u0438 Alder Lake) \u0438 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043d\u043e\u0439 \u043d\u0435\u0434\u043e\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043d\u0435\u0438\u043d\u0438\u0446\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u0434\u0430\u043d\u043d\u044b\u043c, \u043e\u0441\u0442\u0430\u0432\u0448\u0438\u043c\u0441\u044f \u0432 \u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0430\u0445 APIC […]<\/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-104811","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\udd47AEPIC Leak \u2014 \u00fatok, kter\u00fd vede k \u00faniku kl\u00ed\u010d\u016f z enkl\u00e1v Intel SGX | ProHoster","description":"Byly zve\u0159ejn\u011bny informace o nov\u00e9 \u00fatoku na procesory Intel - AEPIC Leak (CVE-2022-21233), kter\u00fd vede k \u00faniku citliv\u00fdch dat z izolovan\u00fdch enkl\u00e1v Intel SGX (Software Guard eXtensions).","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/aepic-leak-ataka-privodyashhaya-k-utechke-klyuchej-iz-anklavov-intel-sgx","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47AEPIC Leak \u2014 \u0430\u0442\u0430\u043a\u0430, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u043a\u043b\u044e\u0447\u0435\u0439 \u0438\u0437 \u0430\u043d\u043a\u043b\u0430\u0432\u043e\u0432 Intel SGX | ProHoster","og:description":"\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u043d\u043e\u0432\u043e\u0439 \u0430\u0442\u0430\u043a\u0435 \u043d\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b Intel - 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