Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 identifi\u00e9e dans le processus en arri\u00e8re-plan rtsold et l'outil rtsol de FreeBSD (CVE-2025-14558), permettant l'ex\u00e9cution de code \u00e0 distance avec des droits root via l'envoi d'un paquet sp\u00e9cialement format\u00e9 contenant une annonce de routeur IPv6. Les messages RA (Router Advertisement), qui exploitent la vuln\u00e9rabilit\u00e9, ne sont pas rout\u00e9s et doivent \u00eatre rejet\u00e9s par les routeurs. Pour mener l'attaque, un attaquant doit \u00eatre en mesure d'envoyer un paquet sp\u00e9cialement format\u00e9 depuis un syst\u00e8me se trouvant sur le m\u00eame segment r\u00e9seau que l'h\u00f4te vuln\u00e9rable. <\/p>\n
Le processus en arri\u00e8re-plan rtsold est utilis\u00e9 sur les h\u00f4tes pour l'auto-configuration de la connexion via IPv6 en utilisant le m\u00e9canisme SLAAC (StateLess Address AutoConfiguration). L'h\u00f4te envoie un message ICMPv6 RS (Router Solicitation) en mode multicast et attend la r\u00e9ception de messages RA (Router Advertisement) des routeurs, contenant des informations sur les pr\u00e9fixes r\u00e9seau et les param\u00e8tres de configuration. L'outil rtsol fournit une fonctionnalit\u00e9 similaire sans lancer de processus en arri\u00e8re-plan. <\/p>\n
La vuln\u00e9rabilit\u00e9 est caus\u00e9e par le fait que rtsold transmet la liste \"domain search\" indiqu\u00e9e dans le message RA \u00e0 l'utilitaire resolvconf sans v\u00e9rifier sa validit\u00e9 ni \u00e9chapper les caract\u00e8res sp\u00e9ciaux. L'utilitaire resolvconf est un script shell qui ne v\u00e9rifie pas les donn\u00e9es d'entr\u00e9e. Pour exploiter la vuln\u00e9rabilit\u00e9, il suffit d'envoyer un paquet RA contenant un nom de domaine<\/a>, incluant des caract\u00e8res sp\u00e9ciaux, tel que \"test`id`test.\" La vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 corrig\u00e9e dans les mises \u00e0 jour FreeBSD 15.0-RELEASE-p1, 14.3-RELEASE-p7, 13.5-RELEASE-p8. <\/p>\n De plus, dans les mises \u00e0 jour FreeBSD 14.3-RELEASE-p7 et 13.5-RELEASE-p8 (la branche 15.x n'est pas concern\u00e9e), une vuln\u00e9rabilit\u00e9 (CVE-2025-14769) a \u00e9t\u00e9 corrig\u00e9e dans le filtre de paquets ipfw, permettant de provoquer une d\u00e9ni de service via l'envoi de paquets sp\u00e9cialement form\u00e9s. La vuln\u00e9rabilit\u00e9 ne se manifeste que lors de l'utilisation de la directive \"tcp-setmss\" dans les r\u00e8gles ipfw. Le probl\u00e8me est caus\u00e9 par le fait que le gestionnaire tcp-setmss peut, dans certaines circonstances, lib\u00e9rer la m\u00e9moire o\u00f9 sont stock\u00e9es les donn\u00e9es du paquet re\u00e7u et renvoyer une erreur. Cette erreur \u00e9tait ignor\u00e9e par le moteur de traitement des r\u00e8gles, ce qui pouvait permettre \u00e0 la r\u00e8gle suivante de laisser passer un paquet dont le buffer de donn\u00e9es a d\u00e9j\u00e0 \u00e9t\u00e9 lib\u00e9r\u00e9, entra\u00eenant le d\u00e9f\u00e9rencement d'un pointeur nul. \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\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\udd47Vuln\u00e9rabilit\u00e9 root \u00e0 distance dans le gestionnaire d'autoconfiguration IPv6 de FreeBSD | ProHoster","description":"Une vuln\u00e9rabilit\u00e9 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Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"