{"id":170428,"date":"2026-05-05T18:24:32","date_gmt":"2026-05-05T16:24:32","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-nix-i-lix-pozvolyayushhie-podnyat-privilegii-v-sisteme"},"modified":"2026-05-05T18:24:32","modified_gmt":"2026-05-05T16:24:32","slug":"uyazvimosti-v-nix-i-lix-pozvolyayushhie-podnyat-privilegii-v-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimosti-v-nix-i-lix-pozvolyayushhie-podnyat-privilegii-v-sisteme","title":{"rendered":"S\u00e9r\u00fcl\u00e9kenys\u00e9gek a Nix \u00e9s Lix rendszerekben, amelyek lehet\u0151v\u00e9 teszik a jogosults\u00e1gok emel\u00e9s\u00e9t a rendszerben","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Nix \u00e9s Lix csomagkezel\u0151kben egy olyan sebezhet\u0151s\u00e9g tal\u00e1lhat\u00f3, amely lehet\u0151v\u00e9 teszi, hogy k\u00f3dot futtassanak h\u00e1tt\u00e9rfolyamatk\u00e9nt, amely a NixOS \u00e9s a t\u00f6bbfelhaszn\u00e1l\u00f3s telep\u00edt\u00e9sek eset\u00e9n root felhaszn\u00e1l\u00f3k\u00e9nt fut. A probl\u00e9ma (CVE nincs megadva) a h\u00e1tt\u00e9rfolyamatban, a nix-daemonnal kapcsolatos, amelyet a nem privilegiz\u00e1lt felhaszn\u00e1l\u00f3k hozz\u00e1f\u00e9r\u00e9s\u00e9nek megszervez\u00e9s\u00e9re haszn\u00e1lnak a build m\u0171veletekhez \u00e9s a csomagt\u00e1rol\u00f3hoz. <\/p>\n

A sebezhet\u0151s\u00e9g a k\u00f6nyvt\u00e1rak rekurz\u00edv feldolgoz\u00e1s\u00e1nak hi\u00e1nyz\u00f3 korl\u00e1toz\u00e1s\u00e1b\u00f3l ered a NAR (Nix Archive) arch\u00edvumok elemz\u00e9s\u00e9hez sz\u00fcks\u00e9ges k\u00f3dban, amit felhaszn\u00e1lhatnak a sz\u00e1lak verem\u00e9nek kimer\u00edt\u00e9s\u00e9re \u00e9s a heap mem\u00f3riatartalm\u00e1nak fel\u00fcl\u00edr\u00e1s\u00e1ra, amely a verem ut\u00e1n helyezkedik el, figyel\u0151oldalak n\u00e9lk\u00fcl. A probl\u00e9ma b\u00e1rmely olyan felhaszn\u00e1l\u00f3 \u00e1ltal kihaszn\u00e1lhat\u00f3, aki k\u00e9pes kapcsolatot l\u00e9tes\u00edteni a nix-daemonnal. Alap\u00e9rtelmez\u00e9s szerint minden felhaszn\u00e1l\u00f3nak van erre lehet\u0151s\u00e9ge, ami lehet\u0151v\u00e9 teszi a jogosults\u00e1gok emel\u00e9s\u00e9t root felhaszn\u00e1l\u00f3ra a t\u00f6bbfelhaszn\u00e1l\u00f3s Nix telep\u00edt\u00e9seken. <\/p>\n

A probl\u00e9ma megold\u00e1s\u00e1ra a rekurzi\u00f3 szintj\u00e9t 64 be\u00e1gyazott k\u00f6nyvt\u00e1rra korl\u00e1tozt\u00e1k, mem\u00f3ria figyel\u0151oldalakat adtak a verem \u00e9s a heap k\u00f6z\u00e9, valamint tov\u00e1bbi ellen\u0151rz\u00e9seket hajtottak v\u00e9gre a szimbolikus linkek NAR-ban val\u00f3 megfelel\u0151 kezel\u00e9s\u00e9re. A Nix eset\u00e9ben a sebezhet\u0151s\u00e9g a 2.24.4-es verzi\u00f3t\u00f3l kezd\u0151d\u0151en van jelen \u00e9s a 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, 2.28.7 verzi\u00f3kban jav\u00edtott\u00e1k. A Lix eset\u00e9ben a sebezhet\u0151s\u00e9g a 2.93.0-\u00e1s verzi\u00f3ban jelent meg, amelyet a 2.93.4, 2.94.2 \u00e9s a 2.95.2 friss\u00edt\u00e9sekben orvosoltak. A Guix csomagkezel\u0151t nem \u00e9rinti a sebezhet\u0151s\u00e9g. <\/p>\n

Ezen k\u00edv\u00fcl a k\u00f6zz\u00e9tett friss\u00edt\u00e9sekben a Nix egy \u00fajabb sebezhet\u0151s\u00e9get jav\u00edtott (CVE nem \u00e1ll rendelkez\u00e9sre), amelyet m\u00e9rs\u00e9kelt vesz\u00e9lyess\u00e9gi szinttel (4.3 a 10-b\u0151l) jel\u00f6ltek. A probl\u00e9ma a Nix 2.24.7 kiad\u00e1s\u00e1t\u00f3l kezdve jelentkezik, \u00e9s lehet\u0151v\u00e9 teszi, hogy f\u00e1jlokat \u00edrjanak be a gy\u00f6k\u00e9rk\u00f6nyvt\u00e1ron k\u00edv\u00fcli ter\u00fcletre, ahov\u00e1 az arch\u00edvumot kicsomagolj\u00e1k. A sebezhet\u0151s\u00e9get a tar-f\u00e1jlokban abszol\u00fat f\u00e1jl\u00fatvonal\u00fa elemek l\u00e9trehoz\u00e1s\u00e1val lehet kihaszn\u00e1lni. Ha ilyen arch\u00edvumokat kicsomagolnak a «nix-prefetch-url —unpack» vagy a «nix store prefetch-file —unpack» parancsokkal, az abszol\u00fat \u00fatvonal\u00fa f\u00e1jlok v\u00e1ltoztat\u00e1s n\u00e9lk\u00fcl ker\u00fclnek kinyer\u00e9sre, relat\u00edv \u00fatvonalra val\u00f3 \u00e1tkonvert\u00e1l\u00e1s n\u00e9lk\u00fcl.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043f\u0430\u043a\u0435\u0442\u043d\u044b\u0445 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0430\u0445 Nix \u0438 Lix \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u0444\u043e\u043d\u043e\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432 NixOS \u0438 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0445 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0430\u0445 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c root. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 (CVE \u043d\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d) \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0444\u043e\u043d\u043e\u0432\u043e\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 nix-daemon, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043a \u0441\u0431\u043e\u0440\u043e\u0447\u043d\u044b\u043c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c \u0438 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0443 \u043f\u0430\u043a\u0435\u0442\u043e\u0432. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u0435\u0442 \u0438\u0437-\u0437\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u0432\u043d\u043e\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0434\u0438\u0440\u0435\u043a\u0442\u043e\u0440\u0438\u0439 \u0432 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-170428","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\udd47Nix \u00e9s Lix 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\u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432 NixOS \u0438 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0445 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0430\u0445 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c 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