{"id":103829,"date":"2022-04-20T21:36:45","date_gmt":"2022-04-20T19:36:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-libinput-privodyashhaya-k-vypolneniyu-koda-pri-podklyuchenii-vredonosnogo-ustrojstva"},"modified":"2022-04-20T21:36:45","modified_gmt":"2022-04-20T19:36:45","slug":"uyazvimost-v-libinput-privodyashhaya-k-vypolneniyu-koda-pri-podklyuchenii-vredonosnogo-ustrojstva","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-libinput-privodyashhaya-k-vypolneniyu-koda-pri-podklyuchenii-vredonosnogo-ustrojstva","title":{"rendered":"Zranitelnost v libinput, vedouc\u00ed k prov\u00e1d\u011bn\u00ed k\u00f3du p\u0159i p\u0159ipojen\u00ed \u0161kodliv\u00e9ho za\u0159\u00edzen\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V knihovn\u011b libinput 1.20.1, kter\u00e1 poskytuje unifikovanou vrstvu pro vstup, umo\u017e\u0148uj\u00edc\u00ed jednotn\u00e9 zpracov\u00e1n\u00ed ud\u00e1lost\u00ed ze vstupn\u00edch za\u0159\u00edzen\u00ed v prost\u0159ed\u00edch zalo\u017een\u00fdch na Wayland a X.Org, byla odstran\u011bna zranitelnost (CVE-2022-1215), kter\u00e1 umo\u017e\u0148uje vykonat vlastn\u00ed k\u00f3d p\u0159i p\u0159ipojen\u00ed speci\u00e1ln\u011b modifikovan\u00e9ho\/emulovan\u00e9ho vstupn\u00edho za\u0159\u00edzen\u00ed k syst\u00e9mu. Probl\u00e9m se projevuje v prost\u0159ed\u00edch zalo\u017een\u00fdch na X.Org a Wayland a lze jej zneu\u017e\u00edt jak p\u0159i m\u00edstn\u00edm p\u0159ipojen\u00ed za\u0159\u00edzen\u00ed, tak p\u0159i manipulaci s za\u0159\u00edzen\u00edmi s rozhran\u00edm Bluetooth. V p\u0159\u00edpad\u011b spu\u0161t\u011bn\u00ed X-serveru s pr\u00e1vy roota umo\u017e\u0148uje zranitelnost dos\u00e1hnout prov\u00e1d\u011bn\u00ed k\u00f3du s vy\u0161\u0161\u00edmi privilegii. <\/p>\n

Probl\u00e9m byl zp\u016fsoben chybou form\u00e1tov\u00e1n\u00ed \u0159et\u011bzce v k\u00f3du, kter\u00fd je odpov\u011bdn\u00fd za z\u00e1pis informac\u00ed o p\u0159ipojen\u00ed za\u0159\u00edzen\u00ed do logu. Konkr\u00e9tn\u011b funkce evdev_log_msg pomoc\u00ed vol\u00e1n\u00ed snprintf upravila p\u016fvodn\u00ed form\u00e1tovac\u00ed \u0159et\u011bzec z\u00e1znamu logu, do kter\u00e9ho bylo p\u0159id\u00e1no jm\u00e9no za\u0159\u00edzen\u00ed jako prefix. Upravovan\u00fd \u0159et\u011bzec byl pot\u00e9 p\u0159ed\u00e1n funkci log_msg_va, kter\u00e1 zase pou\u017e\u00edvala funkci printf. T\u00edmto zp\u016fsobem se v prvn\u00edm argumentu printf, na kter\u00fd se aplikuje parsov\u00e1n\u00ed form\u00e1tovac\u00edch znak\u016f, ocitla neov\u011b\u0159en\u00e1 extern\u00ed data a \u00fato\u010dn\u00edk mohl iniciovat po\u0161kozen\u00ed z\u00e1sobn\u00edku t\u00edm, \u017ee za\u0159\u00eddil n\u00e1vrat za\u0159\u00edzen\u00ed s n\u00e1zvem obsahuj\u00edc\u00edm form\u00e1tovac\u00ed znaky (nap\u0159\u00edklad \u201eEvil %s\u201c).
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 libinput 1.20.1, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u0443\u043d\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0441\u0442\u0435\u043a \u0432\u0432\u043e\u0434\u0430, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043e\u0434\u043d\u0438 \u0438 \u0442\u0435 \u0436\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u043e\u0431\u044b\u0442\u0438\u0439 \u043e\u0442 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \u0432\u0432\u043e\u0434\u0430 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435 Wayland \u0438 X.Org, \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-1215), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0438 \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e\/\u044d\u043c\u0443\u043b\u0438\u0440\u0443\u0435\u043c\u043e\u0433\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430 \u0432\u0432\u043e\u0434\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435 X.Org \u0438 Wayland, \u0438 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c […]<\/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-103829","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 libinput, vedouc\u00ed k prov\u00e1d\u011bn\u00ed k\u00f3du p\u0159i p\u0159ipojen\u00ed \u0161kodliv\u00e9ho za\u0159\u00edzen\u00ed | ProHoster","description":"V knihovn\u011b libinput 1.20.1, kter\u00e1 poskytuje unifikovanou vrstvu pro vstup, umo\u017e\u0148uj\u00edc\u00ed 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