{"id":104105,"date":"2022-05-21T09:36:58","date_gmt":"2022-05-21T07:36:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-podsisteme-yadra-linux-perf-pozvolyayushhaya-podnyat-privilegii"},"modified":"2022-05-21T09:36:58","modified_gmt":"2022-05-21T07:36:58","slug":"uyazvimost-v-podsisteme-yadra-linux-perf-pozvolyayushhaya-podnyat-privilegii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/uyazvimost-v-podsisteme-yadra-linux-perf-pozvolyayushhaya-podnyat-privilegii","title":{"rendered":"Sicherheitsanf\u00e4lligkeit im Linux-Kernel perf-Subsystem, die Privilegien erh\u00f6hen kann","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Im Linux-Kernel wurde eine Sicherheitsanf\u00e4lligkeit (CVE-2022-1729) entdeckt, die es einem lokalen Benutzer erm\u00f6glicht, Root-Zugriff auf das System zu erhalten. Die Sicherheitsanf\u00e4lligkeit wird durch eine Race Condition im perf-Subsystem verursacht, die zur Initiierung eines Zugriffs auf bereits freigegebenen Speicherbereich des Kernels (use-after-free) ausgenutzt werden kann. Das Problem tritt ab der Kernel-Version 4.0-rc1 auf. Die M\u00f6glichkeit der Ausnutzung wurde f\u00fcr Weitergaben 5.4.193+ best\u00e4tigt. <\/p>\n

Ein Fix ist derzeit nur in Form eines Patches verf\u00fcgbar. Die Gef\u00e4hrlichkeit der Sicherheitsanf\u00e4lligkeit wird dadurch gemildert, dass die meisten Distributionen standardm\u00e4\u00dfig den Zugriff auf perf f\u00fcr nicht privilegierte Benutzer einschr\u00e4nken. Als tempor\u00e4re Schutzma\u00dfnahme kann der sysctl-Parameter kernel.perf_event_paranoid auf den Wert 3 gesetzt werden.
\n
Quelle: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u044f\u0434\u0440\u0435 Linux \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-1729), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c \u0433\u043e\u043d\u043a\u0438 \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 perf, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0438\u043d\u0438\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044f \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 \u044f\u0434\u0440\u0430 (use-after-free). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u044f\u0434\u0440\u0430 4.0-rc1. \u0412\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u0434\u043b\u044f \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u0432 5.4.193+. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u043a\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0444\u043e\u0440\u043c\u0435 \u043f\u0430\u0442\u0447\u0430. \u041e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\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-104105","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\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\udd47Sicherheitsanf\u00e4lligkeit im Linux-Kernel perf-Subsystem, die Privilegien erh\u00f6hen kann | ProHoster","description":"Im Linux-Kernel wurde eine 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