{"id":138218,"date":"2025-06-25T17:11:58","date_gmt":"2025-06-25T15:11:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-paketnyh-menedzherah-nix-lix-i-guix"},"modified":"2025-06-25T17:11:58","modified_gmt":"2025-06-25T15:11:58","slug":"uyazvimosti-v-paketnyh-menedzherah-nix-lix-i-guix","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimosti-v-paketnyh-menedzherah-nix-lix-i-guix","title":{"rendered":"Zranitelnosti v bal\u00ed\u010dkov\u00fdch mana\u017eerech Nix, Lix a Guix","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V bal\u00ed\u010dkov\u00fdch mana\u017eerech GNU Guix, Nix a Lix byly zji\u0161t\u011bny zranitelnosti (Nix, Guix, Lix), kter\u00e9 umo\u017e\u0148uj\u00ed vykon\u00e1n\u00ed k\u00f3du s pr\u00e1vy u\u017eivatel\u016f, pod kter\u00fdmi se spou\u0161t\u011bj\u00ed sestavovac\u00ed \u00fakoly (nap\u0159. nixbld* v Nix\/Lix), co\u017e m\u016f\u017ee b\u00fdt vyu\u017eito k z\u00e1pisu vlastn\u00edch dat do sestavovac\u00edho prost\u0159ed\u00ed a k prov\u00e1d\u011bn\u00ed zm\u011bn v procesu sestavov\u00e1n\u00ed. Probl\u00e9my jsou p\u0159\u00edtomny v pozad\u00ed b\u011b\u017e\u00edc\u00edch procesech guix-daemon a nix-daemon, kter\u00e9 se pou\u017e\u00edvaj\u00ed k zaji\u0161t\u011bn\u00ed p\u0159\u00edstupu neprivilegovan\u00fdch u\u017eivatel\u016f k sestavovac\u00edm operac\u00edm. <\/p>\n

Zranitelnosti byly zp\u016fsobeny t\u00edm, \u017ee p\u0159i prov\u00e1d\u011bn\u00ed n\u011bkter\u00fdch operac\u00ed pro p\u0159\u00edstup k do\u010dasn\u00fdm sestavovac\u00edm adres\u00e1\u0159\u016fm byly pou\u017eity nikoli popisova\u010de dirfd, ale \u00fapln\u00e9 cesty k soubor\u016fm, co\u017e umo\u017e\u0148ovalo p\u0159eps\u00e1n\u00ed sestavovac\u00edho adres\u00e1\u0159e um\u00edst\u011bn\u00e9ho v hierarchii \/tmp (nap\u0159\u00edklad \"\/tmp\/guix-build-PACKAGE-X.Y.drv-0\"). Nespr\u00e1vn\u00e9 pou\u017eit\u00ed dirfd ve funkci rekurzivn\u00edho maz\u00e1n\u00ed vedlo k z\u00e1vodu stavu, p\u0159i n\u011bm\u017e mohl \u00fato\u010dn\u00edk vlo\u017eit symbolick\u00fd odkaz v okam\u017eiku mezi vytvo\u0159en\u00edm a zm\u011bnou vlastn\u00edka sestavovac\u00edho adres\u00e1\u0159e. P\u0159i \u00fasp\u011b\u0161n\u00e9m \u00fatoku guix-daemon\/nix-daemon m\u00edsto zm\u011bny u\u017eivatele pro sestavovac\u00ed adres\u00e1\u0159 m\u011bnil vlastn\u00edka pro soubor odkazovan\u00fd symbolick\u00fdm odkazem. <\/p>\n

Zranitelnosti byly odstran\u011bny v aktualizac\u00edch Lix 2.93, Nix 2.29 a Guix 1.4.0-38.0e79d5b. Aby \u00fato\u010dn\u00edk mohl zranitelnosti vyu\u017e\u00edt, mus\u00ed m\u00edt mo\u017enost spou\u0161t\u011bt libovoln\u00e9 sestavovac\u00ed \u00falohy. Pro vyu\u017eit\u00ed zranitelnosti CVE-2025-46415 sta\u010d\u00ed m\u00edt mo\u017enost vytv\u00e1\u0159et soubory v adres\u00e1\u0159i \/tmp na sestavovac\u00edm stroji, a pro zranitelnost CVE-2025-46416 je nutn\u00e9 m\u00edt mo\u017enost spou\u0161t\u011bn\u00ed k\u00f3du v kontextu hlavn\u00edho jmenn\u00e9ho prostoru identifik\u00e1tor\u016f u\u017eivatel\u016f (pid namespace) a s\u00edt\u011b (network namespace).
\n
Zdroj: 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 GNU Guix, Nix \u0438 Lix \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u0438\u043e\u0441\u0442\u0438 (Nix, Guix, Lix), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u043f\u043e\u0434 \u043a\u043e\u0442\u043e\u0440\u044b\u043c\u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u044e\u0442\u0441\u044f \u0441\u0431\u043e\u0440\u043e\u0447\u043d\u044b\u0435 \u0437\u0430\u0434\u0430\u043d\u0438\u044f (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, nixbld* \u0432 Nix\/Lix), \u0447\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f 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