{"id":111907,"date":"2023-12-01T21:10:27","date_gmt":"2023-12-01T19:10:27","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/logofail-ataka-na-uefi-proshivki-cherez-podstanovku-vredonosnyh-logotipov"},"modified":"2023-12-01T21:10:27","modified_gmt":"2023-12-01T19:10:27","slug":"logofail-ataka-na-uefi-proshivki-cherez-podstanovku-vredonosnyh-logotipov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/logofail-ataka-na-uefi-proshivki-cherez-podstanovku-vredonosnyh-logotipov","title":{"rendered":"LogoFAIL \u2014 \u00fatok na UEFI firwary prost\u0159ednictv\u00edm vkl\u00e1d\u00e1n\u00ed \u0161kodliv\u00fdch logotyp\u016f","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V\u00fdzkumn\u00edci z firmy Binarly odhalili s\u00e9rii zranitelnost\u00ed v k\u00f3du pro anal\u00fdzu obr\u00e1zk\u016f pou\u017e\u00edvan\u00e9m v UEFI firmwaru r\u016fzn\u00fdch v\u00fdrobc\u016f. Zranitelnosti umo\u017e\u0148uj\u00ed proveden\u00ed vlastn\u00edho k\u00f3du b\u011bhem spu\u0161t\u011bn\u00ed prost\u0159ednictv\u00edm um\u00edst\u011bn\u00ed speci\u00e1ln\u011b vytvo\u0159en\u00e9ho obr\u00e1zku v odd\u00edlu ESP (EFI System Partition) nebo v nezaru\u010den\u00e9 \u010d\u00e1sti aktualizace firmwaru. Navrhovan\u00e1 metoda \u00fatoku m\u016f\u017ee b\u00fdt pou\u017eita k obejit\u00ed mechanismu ov\u011b\u0159ov\u00e1n\u00ed UEFI Secure Boot a hardwarov\u00fdch ochrann\u00fdch mechanism\u016f, jako je Intel Boot Guard, AMD Hardware-Validated Boot a ARM TrustZone Secure Boot. <\/p>\n

Probl\u00e9m je zp\u016fsoben t\u00edm, \u017ee firmwary umo\u017e\u0148uj\u00ed zobrazov\u00e1n\u00ed u\u017eivatelsk\u00fdch logotyp\u016f a vyu\u017e\u00edvaj\u00ed k tomu knihovny pro anal\u00fdzu obr\u00e1zk\u016f, kter\u00e9 se prov\u00e1d\u011bj\u00ed na \u00farovni firmwaru bez sn\u00ed\u017een\u00ed privilegi\u00ed. Je zaznamen\u00e1no, \u017ee modern\u00ed firmwary obsahuj\u00ed k\u00f3d pro anal\u00fdzu form\u00e1t\u016f BMP, GIF, JPEG, PCX a TGA, v nich\u017e jsou zranitelnosti vedouc\u00ed k p\u0159ete\u010den\u00ed\u7f13 buferu p\u0159i anal\u00fdze nespr\u00e1vn\u00fdch dat. <\/p>\n

Zranitelnosti byly zji\u0161t\u011bny ve firmwaru dod\u00e1van\u00e9m r\u016fzn\u00fdmi v\u00fdrobci hardwaru (Intel, Acer, Lenovo) a v\u00fdrobci firmwaru (AMI, Insyde, Phoenix). Vzhledem k tomu, \u017ee probl\u00e9mov\u00fd k\u00f3d je p\u0159\u00edtomen v referen\u010dn\u00edch komponent\u00e1ch poskytovan\u00fdch nez\u00e1visl\u00fdmi dodavateli firmwaru a pou\u017e\u00edvan\u00fdch jako z\u00e1klad pro vytv\u00e1\u0159en\u00ed vlastn\u00edch firmwar\u016f r\u016fzn\u00fdmi v\u00fdrobci hardwaru, zranitelnosti nejsou specifick\u00e9 pro konkr\u00e9tn\u00ed dodavatele a zasahuj\u00ed celou ekosyst\u00e9m. <\/p>\n

Podrobnosti o odhalen\u00fdch zranitelnostech budou zve\u0159ejn\u011bny 6. prosince na konferenci Black Hat Europe 2023. V prezentaci na konferenci bude tak\u00e9 demonstrov\u00e1n exploit, kter\u00fd umo\u017e\u0148uje proveden\u00ed vlastn\u00edho k\u00f3du s opr\u00e1vn\u011bn\u00edmi firmwaru na syst\u00e9mech s architekturou x86 a ARM. P\u016fvodn\u011b byly zranitelnosti odhaleny b\u011bhem anal\u00fdzy firmwaru Lenovo postaven\u00e9ho na platform\u00e1ch od Insyde, AMI a Phoenix, ale potenci\u00e1ln\u011b zraniteln\u00fd je tak\u00e9 firmware od Intelu a Acera.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043a\u043e\u0434\u0430 \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0447\u0435\u0440\u0435\u0437 \u0440\u0430\u0437\u043c\u0435\u0449\u0435\u043d\u0438\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u044f \u0432 \u0440\u0430\u0437\u0434\u0435\u043b\u0435 ESP (EFI System Partition) \u0438\u043b\u0438 \u0432 \u043d\u0435 \u0437\u0430\u0432\u0435\u0440\u0435\u043d\u043d\u043e\u0439 \u0446\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u043f\u043e\u0434\u043f\u0438\u0441\u044c\u044e \u0447\u0430\u0441\u0442\u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0438. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u0432\u0435\u0440\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 […]<\/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-111907","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\udd47LogoFAIL \u2013 \u00fatok na UEFI firmwary prost\u0159ednictv\u00edm substituce 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