{"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\/es\/blog\/news\/uyazvimos-v-glibc-pozvolyayushhaya-vyzvat-krah-chuzhogo-proczessa","title":{"rendered":"Vulnerabilidad en Glibc que permite provocar el fallo de un proceso ajeno","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Se ha descubierto una vulnerabilidad en Glibc (CVE-2021-38604) que permite provocar la ca\u00edda de procesos en el sistema mediante el env\u00edo de un mensaje especialmente dise\u00f1ado a trav\u00e9s de la API de colas de mensajes POSIX. En las distribuciones, el problema no se hab\u00eda manifestado, ya que solo est\u00e1 presente en la versi\u00f3n 2.34, publicada hace dos semanas. <\/p>\n

El problema es causado por un manejo incorrecto de los datos NOTIFY_REMOVED en el c\u00f3digo de mq_notify.c, lo que lleva a la desreferenciaci\u00f3n de un puntero NULL y a la ca\u00edda del proceso. Es interesante que el problema es consecuencia de un descuido al corregir otra vulnerabilidad (CVE-2021-33574), arreglada en la versi\u00f3n de Glibc 2.34. Mientras que la primera vulnerabilidad era bastante dif\u00edcil de explotar y requer\u00eda una combinaci\u00f3n de ciertas circunstancias, llevar a cabo un ataque utilizando el segundo problema es significativamente m\u00e1s f\u00e1cil.
\n
Fuente: 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\udd47Vulnerabilidad en Glibc que permite provocar la ca\u00edda de procesos ajenos | ProHoster","description":"Se ha descubierto una vulnerabilidad en Glibc (CVE-2021-38604) que permite provocar la ca\u00edda de procesos en el sistema mediante el env\u00edo de un mensaje especialmente dise\u00f1ado a trav\u00e9s de la API de colas de mensajes 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