{"id":114268,"date":"2024-03-12T12:25:57","date_gmt":"2024-03-12T10:25:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-android-14-ekspluatiruemaya-cherez-bluetooth-le"},"modified":"2024-03-12T12:25:57","modified_gmt":"2024-03-12T10:25:57","slug":"uyazvimost-v-android-14-ekspluatiruemaya-cherez-bluetooth-le","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-android-14-ekspluatiruemaya-cherez-bluetooth-le","title":{"rendered":"Zranitelnost v Androidu 14, exploatovan\u00e1 p\u0159es Bluetooth LE","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V\u00fdvoj\u00e1\u0159i projektu GrapheneOS, kter\u00fd vyv\u00edj\u00ed zabezpe\u010denou odno\u017e k\u00f3du AOSP (Android Open Source Project), odhalili zranitelnost v Bluetooth stacku platformy Android 14, kter\u00e1 potenci\u00e1ln\u011b m\u016f\u017ee v\u00e9st k vzd\u00e1len\u00e9mu spu\u0161t\u011bn\u00ed k\u00f3du. Probl\u00e9m je zp\u016fsoben p\u0159\u00edstupem k ji\u017e uvoln\u011bn\u00e9 oblasti pam\u011bti (use-after-free) v k\u00f3du pro zpracov\u00e1n\u00ed zvuku p\u0159en\u00e1\u0161en\u00e9ho p\u0159es Bluetooth LE. <\/p>\n

Zranitelnost byla odhalena d\u00edky integraci dodate\u010dn\u00e9 ochrany do vol\u00e1n\u00ed hardened_malloc, kter\u00e1 vyu\u017e\u00edv\u00e1 roz\u0161\u00ed\u0159en\u00ed ARMv8.5 MTE (MemTag, Memory Tagging Extension), umo\u017e\u0148uj\u00edc\u00ed p\u0159i\u0159adit tagy k ka\u017ed\u00e9 operaci alokace pam\u011bti a prov\u00e1d\u011bt kontrolu spr\u00e1vnosti pou\u017eit\u00ed ukazatel\u016f, aby se zablokovalo zneu\u017eit\u00ed zranitelnost\u00ed zp\u016fsoben\u00fdch p\u0159\u00edstupem k ji\u017e uvoln\u011bn\u00fdm blok\u016fm pam\u011bti, p\u0159ete\u010den\u00edm bufferu, p\u0159\u00edstupem p\u0159ed inicializac\u00ed a pou\u017e\u00edv\u00e1n\u00edm mimo aktu\u00e1ln\u00ed kontext. <\/p>\n

Chyba se projevuje od aktualizace Android 14 QPR2 (Quarterly Platform Release), kter\u00e1 byla vyd\u00e1na na za\u010d\u00e1tku b\u0159ezna. V hlavn\u00edm k\u00f3du platformy Android 14 je mechanismus MTE k dispozici jako volba a zat\u00edm se ve v\u00fdchoz\u00edm nastaven\u00ed nepou\u017e\u00edv\u00e1, ale v GrapheneOS u\u017e byl nasazen pro dal\u0161\u00ed ochranu, co\u017e umo\u017enilo diagnostikovat chybu po aktualizaci na Android 14 QPR2. Chyba vedla k havarijn\u00edmu ukon\u010den\u00ed p\u0159i pou\u017e\u00edv\u00e1n\u00ed Bluetooth sluch\u00e1tek Samsung Galaxy Buds2 Pro s firmwarem, ve kter\u00e9m byla aktivov\u00e1na ochrana zalo\u017een\u00e1 na MTE. Rozbor incidentu uk\u00e1zal, \u017ee probl\u00e9m souvis\u00ed s p\u0159\u00edstupem k ji\u017e uvoln\u011bn\u00e9 pam\u011bti v zpracovateli Bluetooth LE, a nikoli s chybou kv\u016fli integraci MTE. <\/p>\n

Zranitelnost byla opravena ve verzi GrapheneOS 2024030900 a t\u00fdk\u00e1 se sestaven\u00ed pro chytr\u00e9 telefony, u nich\u017e nen\u00ed zahrnuta dal\u0161\u00ed hardwarov\u00e1 ochrana zalo\u017een\u00e1 na roz\u0161\u00ed\u0159en\u00ed MTE (MTE je zat\u00edm aktivn\u00ed pouze pro za\u0159\u00edzen\u00ed Pixel 8 a Pixel 8 Pro). Zranitelnost se projevuje na chytr\u00fdch telefonech Google Pixel 8 s firmwarem zalo\u017een\u00fdm na Androidu 14 QPR2. V Androidu na chytr\u00fdch telefonech \u0159ady Pixel 8 lze re\u017eim MTE aktivovat v nastaven\u00ed pro v\u00fdvoj\u00e1\u0159e (\"Nastaven\u00ed \/ Syst\u00e9m \/ Mo\u017enosti pro v\u00fdvoj\u00e1\u0159e \/ Roz\u0161\u00ed\u0159en\u00ed zna\u010dkov\u00e1n\u00ed pam\u011bti\"). Aktivace MTE vede k p\u0159ibli\u017en\u00e9mu zv\u00fd\u0161en\u00ed spot\u0159eby pam\u011bti o 3 %, ale nesni\u017euje v\u00fdkon.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 GrapheneOS, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0435 \u043e\u0442\u0432\u0435\u0442\u0432\u043b\u0435\u043d\u0438\u0435 \u043e\u0442 \u043a\u043e\u0434\u043e\u0432\u043e\u0439 \u0431\u0430\u0437\u044b AOSP (Android Open Source Project), \u0432\u044b\u044f\u0432\u0438\u043b\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 Bluetooth-\u0441\u0442\u0435\u043a\u0435 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b Android 14, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u043c\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435\u043c \u043a \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u043e\u0439 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 (use-after-free) \u0432 \u043a\u043e\u0434\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0437\u0432\u0443\u043a\u0430, \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0430\u0435\u043c\u043e\u0433\u043e \u0447\u0435\u0440\u0435\u0437 Bluetooth LE. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0431\u043b\u0430\u0433\u043e\u0434\u0430\u0440\u044f \u0438\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u0438 \u0432 \u0432\u044b\u0437\u043e\u0432 hardened_malloc \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0437\u0430\u0449\u0438\u0442\u044b, […]<\/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-114268","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\udd47Zranitelnost v Android 14 zneu\u017e\u00edvan\u00e1 p\u0159es Bluetooth LE | ProHoster","description":"V\u00fdvoj\u00e1\u0159i projektu GrapheneOS, kter\u00fd vyv\u00edj\u00ed zabezpe\u010denou odno\u017e k\u00f3du AOSP (Android Open Source Project), odhalili zranitelnost v Bluetooth stacku platformy Android 14, kter\u00e1 potenci\u00e1ln\u011b m\u016f\u017ee 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GrapheneOS, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0435 \u043e\u0442\u0432\u0435\u0442\u0432\u043b\u0435\u043d\u0438\u0435 \u043e\u0442 \u043a\u043e\u0434\u043e\u0432\u043e\u0439 \u0431\u0430\u0437\u044b AOSP (Android Open Source Project), \u0432\u044b\u044f\u0432\u0438\u043b\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 Bluetooth-\u0441\u0442\u0435\u043a\u0435 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b Android 14, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0436\u0435\u0442 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