A FreeBSD alkalmazott rtsold h\u00e1tt\u00e9rfolyamat\u00e1ban \u00e9s az rtsol seg\u00e9dprogramban egy sebezhet\u0151s\u00e9g (CVE-2025-14558) ker\u00fclt felfedez\u00e9sre, amely lehet\u0151v\u00e9 teszi a root jogokkal t\u00f6rt\u00e9n\u0151 t\u00e1voli k\u00f3dv\u00e9grehajt\u00e1st egy specifikusan megform\u00e1lt IPv6-router hirdet\u00e9si csomag k\u00fcld\u00e9s\u00e9vel. Az RA-\u00fczenetek (Router Advertisement), amelyeken kereszt\u00fcl a sebezhet\u0151s\u00e9g kiakn\u00e1zhat\u00f3, nem ir\u00e1ny\u00edt\u00f3dnak tov\u00e1bb, \u00e9s a routereknek el kell dobniuk \u0151ket. A t\u00e1mad\u00e1shoz a t\u00e1mad\u00f3nak k\u00e9pesnek kell lennie arra, hogy egy megfelel\u0151en megform\u00e1lt csomagot k\u00fcldj\u00f6n olyan rendszerb\u0151l, amely ugyanabban a h\u00e1l\u00f3zati szegmensben tal\u00e1lhat\u00f3, mint a sebezhet\u0151 hoszt. <\/p>\n
Az rtsold h\u00e1tt\u00e9rfolyamatot a hosztok haszn\u00e1lj\u00e1k az IPv6 kapcsolat automatikus konfigur\u00e1l\u00e1s\u00e1ra az SLAAC (StateLess Address AutoConfiguration) mechanizmussal. A hoszt ICMPv6 RS-\u00fczenetet (Router Solicitation) k\u00fcld a multicast m\u00f3dban \u00e9s v\u00e1rja a routerekb\u0151l \u00e9rkez\u0151 RA-\u00fczeneteket (Router Advertisement), amelyek tartalmazz\u00e1k a h\u00e1l\u00f3zati prefixeket \u00e9s a konfigur\u00e1ci\u00f3s param\u00e9tereket. Az rtsol seg\u00e9dprogram hasonl\u00f3 funkci\u00f3t val\u00f3s\u00edt meg h\u00e1tt\u00e9rfolyamat ind\u00edt\u00e1sa n\u00e9lk\u00fcl. <\/p>\n
A sebezhet\u0151s\u00e9g abb\u00f3l ad\u00f3dik, hogy a rtsold a RA-\u00fczenetben megadott «domain search» list\u00e1t a resolvconf seg\u00e9dprogramhoz tov\u00e1bb\u00edtja helyes ellen\u0151rz\u00e9s \u00e9s speci\u00e1lis karakterek kisz\u0171r\u00e9se n\u00e9lk\u00fcl. A resolvconf egy shell-szkript, amely nem ellen\u0151rzi a bemeneti adatokat. A sebezhet\u0151s\u00e9g kihaszn\u00e1l\u00e1s\u00e1hoz elegend\u0151 egy RA-csomagot k\u00fcldeni a n\u00e9vvel domain<\/a>, amely speci\u00e1lis karaktereket tartalmaz, p\u00e9ld\u00e1ul «test`id`test. A sebezhet\u0151s\u00e9get a FreeBSD 15.0-RELEASE-p1, 14.3-RELEASE-p7, 13.5-RELEASE-p8 friss\u00edt\u00e9sei orvosolj\u00e1k. <\/p>\n Ezen k\u00edv\u00fcl a FreeBSD 14.3-RELEASE-p7 \u00e9s 13.5-RELEASE-p8 friss\u00edt\u00e9sek (a 15.x \u00e1gat a probl\u00e9ma nem \u00e9rinti) megoldj\u00e1k a ipfw csomagsz\u0171r\u0151ben tal\u00e1lhat\u00f3 sebezhet\u0151s\u00e9get (CVE-2025-14769), amely lehet\u0151v\u00e9 teszi a szolg\u00e1ltat\u00e1smegtagad\u00e1st speci\u00e1lisan form\u00e1zott csomagok k\u00fcld\u00e9s\u00e9vel. A sebezhet\u0151s\u00e9g csak a ipfw szab\u00e1lyaiban tal\u00e1lhat\u00f3 «tcp-setmss» direkt\u00edva haszn\u00e1latakor nyilv\u00e1nul meg. A probl\u00e9ma abb\u00f3l ad\u00f3dik, hogy a tcp-setmss kezel\u0151je bizonyos k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt felszabad\u00edthatja a mem\u00f3ri\u00e1t, amely a be\u00e9rkez\u0151 csomag adatait t\u00e1rolja, \u00e9s hib\u00e1t adhat vissza. A megjelen\u00edtett hib\u00e1t a szab\u00e1lykezel\u0151 motor figyelmen k\u00edv\u00fcl hagyta, ez\u00e9rt a k\u00f6vetkez\u0151 szab\u00e1ly enged\u00e9lyezhette az olyan csomag \u00e1thalad\u00e1s\u00e1t, amelynek adatainak puffere m\u00e1r felszabadult, ami nullpointer derefer\u00e1l\u00e1shoz vezet. \u0412 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0445 \u0432\u043e FreeBSD \u0444\u043e\u043d\u043e\u0432\u043e\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 rtsold \u0438 \u0443\u0442\u0438\u043b\u0438\u0442\u0435 rtsol \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-14558), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \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 \u043f\u0430\u043a\u0435\u0442\u0430 c \u0430\u043d\u043e\u043d\u0441\u043e\u043c IPv6-\u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u0430. RA-\u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f (Router Advertisement), \u0447\u0435\u0440\u0435\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043d\u0435 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0438\u0440\u0443\u044e\u0442\u0441\u044f \u0438 \u0434\u043e\u043b\u0436\u043d\u044b \u043e\u0442\u0431\u0440\u0430\u0441\u044b\u0432\u0430\u0442\u044c\u0441\u044f \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u0430\u043c\u0438. \u0414\u043b\u044f \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a \u0434\u043e\u043b\u0436\u0435\u043d \u0438\u043c\u0435\u0442\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u043f\u0430\u043a\u0435\u0442\u0430 \u0441 \u0441\u0438\u0441\u0442\u0435\u043c\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-152349","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\udd47T\u00e1voli root s\u00e9r\u00fcl\u00e9kenys\u00e9g az IPv6 automatikus konfigu\u00e1ci\u00f3s kezel\u0151j\u00e9ben a FreeBSD-ben | 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Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"