{"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\/da\/blog\/news\/uyazvimost-v-libinput-privodyashhaya-k-vypolneniyu-koda-pri-podklyuchenii-vredonosnogo-ustrojstva","title":{"rendered":"S\u00e5rbarhed i libinput, der f\u00f8rer til eksekvering af kode ved tilslutning af ondsindet enhed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I libinput-biblioteket 1.20.1, der tilbyder en ensartet inputstack, der muligg\u00f8r anvendelse af de samme metoder til behandlingen af h\u00e6ndelser fra inputenheder i Wayland- og X.Org-milj\u00f8er, er der blevet rettet en s\u00e5rbarhed (CVE-2022-1215), som tillader udf\u00f8relse af brugerdefineret kode ved tilslutning af et specialmodificeret\/emuleret inputdevice til systemet. Problemet opst\u00e5r i milj\u00f8er baseret p\u00e5 X.Org og Wayland, og kan udnyttes b\u00e5de ved lokal tilslutning af enheder og ved manipulation af enheder med Bluetooth-interface. Hvis X-serveren k\u00f8rer med root-rettigheder, kan s\u00e5rbarheden f\u00f8re til udf\u00f8relse af kode med forh\u00f8jede privilegier. <\/p>\n

Problemet skyldes en fejl i formatstringen i koden, der er ansvarlig for at logge oplysninger om enhedens forbindelse. Is\u00e6r \u00e6ndrede funktionen evdev_log_msg den oprindelige formatstring for logindf\u00f8rselen ved hj\u00e6lp af kaldet snprintf, hvor enhedens navn blev tilf\u00f8jet som et pr\u00e6fiks. Den \u00e6ndrede streng blev derefter sendt til funktionen log_msg_va, som igen brugte funktionen printf. S\u00e5ledes var der uvaliderede eksterne data i det f\u00f8rste argument til printf, hvortil der blev anvendt fortolking af formattegn, og en angriber kunne udl\u00f8se en stakbeskadigelse ved at f\u00e5 enheden til at returnere et navn, der indeholdt formattegn (f.eks. \u00abEvil %s\u00bb).
\n
Kilde: 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\udd47S\u00e5rbarhed i libinput, som f\u00f8rer til udf\u00f8relse af kode ved tilslutning af et ondsindet device | ProHoster","description":"I libinput-biblioteket 1.20.1, der tilbyder en ensartet inputstack, der muligg\u00f8r anvendelse af de samme metoder til behandlingen af h\u00e6ndelser fra inputenheder 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