{"id":118544,"date":"2024-07-29T09:43:08","date_gmt":"2024-07-29T07:43:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/oshibka-v-lsm-module-landlock-pozvolyala-zanovo-poluchit-sbroshennye-privilegii"},"modified":"2024-07-29T09:43:08","modified_gmt":"2024-07-29T07:43:08","slug":"oshibka-v-lsm-module-landlock-pozvolyala-zanovo-poluchit-sbroshennye-privilegii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/oshibka-v-lsm-module-landlock-pozvolyala-zanovo-poluchit-sbroshennye-privilegii","title":{"rendered":"Hiba az LSM Landlock modulban lehet\u0151v\u00e9 tette a vissza\u00e1ll\u00edtott privil\u00e9giumok \u00fajranyer\u00e9s\u00e9t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Jann Horn a Google Project Zero csapat\u00e1b\u00f3l, aki egykor felfedezte a Spectre \u00e9s Meltdown sebezhet\u0151s\u00e9geket, logikai hib\u00e1t tal\u00e1lt a Linux biztons\u00e1gi modul (LSM) Landlock megval\u00f3s\u00edt\u00e1s\u00e1ban, amely lehet\u0151v\u00e9 teszi egy program sz\u00e1m\u00e1ra, hogy visszakapja a m\u00e1r visszavont jogosults\u00e1gait, ha a program hozz\u00e1f\u00e9r\u00e9ssel b\u00edr a fork() \u00e9s keyctl() rendszerh\u00edv\u00e1sokhoz. <\/p>\n

A Landlock mechanizmus lehet\u0151v\u00e9 teszi az alacsony jogosults\u00e1g\u00fa programok sz\u00e1m\u00e1ra, hogy eldobj\u00e1k a m\u0171k\u00f6d\u00e9s\u00fckh\u00f6z sz\u00fcks\u00e9gtelen jogosults\u00e1gokat, \u00f6nk\u00e9ntesen korl\u00e1tozva a tov\u00e1bbi hozz\u00e1f\u00e9r\u00e9s\u00fcket a rendszerhez a biztons\u00e1g n\u00f6vel\u00e9se \u00e9rdek\u00e9ben, p\u00e9ld\u00e1ul a program sebezhet\u0151s\u00e9geinek kihaszn\u00e1l\u00e1s\u00e1val szembeni v\u00e9delem \u00e9rdek\u00e9ben. P\u00e9ld\u00e1ul a program megtilthatja a hozz\u00e1f\u00e9r\u00e9st a munkak\u00f6nyvt\u00e1ron k\u00edv\u00fcli f\u00e1jlokhoz. <\/p>\n

Ahogy a Google m\u00e9rn\u00f6ke felfedezte, bizonyos helyzeteket nem vettek figyelembe a modul fejleszt\u0151i, \u00e9s ez lehet\u0151v\u00e9 teszi a program sz\u00e1m\u00e1ra, hogy bizonyos felt\u00e9telek mellett \u00fajb\u00f3l megszerezze a visszavont jogosults\u00e1gait. A hiba minden olyan kernel verzi\u00f3ban megtal\u00e1lhat\u00f3, amely LSM modult haszn\u00e1l e modulra, mivel az eredeti megval\u00f3s\u00edt\u00e1sban is jelen van. A hiba jav\u00edt\u00e1sa a mai 6.11-rc1 kernel teszt kiad\u00e1s\u00e1ban szerepel, de m\u00e9g nem ker\u00fclt \u00e1t a stabil \u00e1gba.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u042f\u043d\u043d \u0425\u043e\u0440\u043d (Jann Horn) \u0438\u0437 \u043a\u043e\u043c\u0430\u043d\u0434\u044b Google Project Zero, \u0432 \u0441\u0432\u043e\u0451 \u0432\u0440\u0435\u043c\u044f \u0432\u044b\u044f\u0432\u0438\u0432\u0448\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 Spectre \u0438 Meltdown, \u043d\u0430\u0448\u0451\u043b \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u043e\u0448\u0438\u0431\u043a\u0443 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043c\u043e\u0434\u0443\u043b\u044f \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 Linux (LSM) Landlock, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0443\u044e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043e\u0431\u0440\u0430\u0442\u043d\u043e \u0443\u0436\u0435 \u0441\u0431\u0440\u043e\u0448\u0435\u043d\u043d\u044b\u0435 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438, \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u0443 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u043c \u0432\u044b\u0437\u043e\u0432\u0430\u043c fork() \u0438 keyctl(). \u041c\u0435\u0445\u0430\u043d\u0438\u0437\u043c Landlock \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430\u043c \u0441\u0431\u0440\u0430\u0441\u044b\u0432\u0430\u0442\u044c \u043d\u0435\u043d\u0443\u0436\u043d\u044b\u0435 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b […]<\/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-118544","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\udd47A hiba a LSM modulban Landlock \u00fajra lehet\u0151v\u00e9 tette a visszavont jogosults\u00e1gok megszerz\u00e9s\u00e9t | ProHoster","description":"Jann Horn a Google Project Zero csapat\u00e1b\u00f3l, aki egykor felfedezte a Spectre \u00e9s Meltdown sebezhet\u0151s\u00e9geket, logikai hib\u00e1t tal\u00e1lt a Linux biztons\u00e1gi modul (LSM) Landlock megval\u00f3s\u00edt\u00e1s\u00e1ban, amely lehet\u0151v\u00e9 teszi a 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