{"id":101027,"date":"2021-08-17T10:22:36","date_gmt":"2021-08-17T08:22:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimos-v-glibc-pozvolyayushhaya-vyzvat-krah-chuzhogo-proczessa"},"modified":"2021-08-17T10:22:36","modified_gmt":"2021-08-17T08:22:36","slug":"uyazvimos-v-glibc-pozvolyayushhaya-vyzvat-krah-chuzhogo-proczessa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/uyazvimos-v-glibc-pozvolyayushhaya-vyzvat-krah-chuzhogo-proczessa","title":{"rendered":"Vuln\u00e9rabilit\u00e9 dans Glibc permettant de provoquer le crash d'un processus tiers","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 identifi\u00e9e dans Glibc (CVE-2021-38604), permettant d'initier le crash de processus dans le syst\u00e8me en envoyant un message sp\u00e9cialement format\u00e9 via l'API des files de messages POSIX. Dans les distributions, le probl\u00e8me ne s'est pas encore manifest\u00e9, car il n'est pr\u00e9sent que dans la version 2.34, publi\u00e9e il y a deux semaines. <\/p>\n

Le probl\u00e8me est caus\u00e9 par un traitement incorrect des donn\u00e9es NOTIFY_REMOVED dans le code mq_notify.c, entra\u00eenant un d\u00e9r\u00e9f\u00e9rencement de pointeur NULL et le crash du processus. Il est int\u00e9ressant de noter que ce probl\u00e8me r\u00e9sulte d'une n\u00e9gligence lors de la correction d'une autre vuln\u00e9rabilit\u00e9 (CVE-2021-33574), corrig\u00e9e dans la version Glibc 2.34. Cependant, alors que la premi\u00e8re vuln\u00e9rabilit\u00e9 \u00e9tait assez difficile \u00e0 exploiter et n\u00e9cessitait un certain nombre de conditions, mener une attaque en utilisant le second probl\u00e8me est beaucoup plus simple.
\n
Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 Glibc \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-38604), \u0434\u0430\u044e\u0449\u0430\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0438\u043d\u0438\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043a\u0440\u0430\u0445 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f \u0447\u0435\u0440\u0435\u0437 POSIX message queues API. \u0412 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043d\u0435 \u0443\u0441\u043f\u0435\u043b\u0430 \u043f\u0440\u043e\u044f\u0432\u0438\u0442\u044c\u0441\u044f, \u0442\u0430\u043a \u043a\u0430\u043a \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 2.34, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u043e\u043c \u0434\u0432\u0435 \u043d\u0435\u0434\u0435\u043b\u0438 \u043d\u0430\u0437\u0430\u0434. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u0434\u0430\u043d\u043d\u044b\u0445 NOTIFY_REMOVED \u0432 \u043a\u043e\u0434\u0435 mq_notify.c, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u0440\u0430\u0437\u044b\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u044f \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f NULL \u0438 \u043a\u0440\u0430\u0445\u0443 […]<\/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-101027","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\udd47Vuln\u00e9rabilit\u00e9 dans Glibc permettant de provoquer le crash d'un processus tiers | ProHoster","description":"Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 identifi\u00e9e dans Glibc (CVE-2021-38604), permettant d'initier le crash de processus dans le syst\u00e8me en envoyant un message sp\u00e9cialement format\u00e9 via l'API des files de messages 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