{"id":152349,"date":"2025-12-22T17:12:34","date_gmt":"2025-12-22T15:12:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd"},"modified":"2025-12-22T17:12:34","modified_gmt":"2025-12-22T15:12:34","slug":"udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd","title":{"rendered":"Vulnerabilit\u00e0 root remota nel gestore dell'autoconfigurazione IPv6 su FreeBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00c8 stata individuata una vulnerabilit\u00e0 (CVE-2025-14558) nel processo in background rtsold e nell'utilit\u00e0 rtsol utilizzati in FreeBSD, che consente l'esecuzione remota di codice con diritti di root tramite l'invio di un pacchetto appositamente formattato con annuncio IPv6 del router. I messaggi RA (Router Advertisement), attraverso i quali viene sfruttata la vulnerabilit\u00e0, non vengono instradati e devono essere scartati dai router. Per attuare l'attacco, un malintenzionato deve avere la possibilit\u00e0 di inviare un pacchetto appositamente formattato da un sistema che si trovi nella stessa segmentazione di rete dell'host vulnerabile. <\/p>\n

Il processo in background rtsold \u00e8 utilizzato sugli host per l'auto-configurazione della connessione tramite IPv6 sfruttando il meccanismo SLAAC (StateLess Address AutoConfiguration). L'host invia un messaggio ICMPv6 RS (Router Solicitation) in modalit\u00e0 multicast e attende l'arrivo di messaggi RA (Router Advertisement) dai router, contenenti informazioni sui prefissi di rete e sui parametri di configurazione. L'utilit\u00e0 rtsol implementa funzionalit\u00e0 simili senza avviare un processo in background. <\/p>\n

La vulnerabilit\u00e0 \u00e8 causata dal fatto che rtsold invia l'elenco \"domain search\" specificato nel messaggio RA all'utilit\u00e0 resolvconf senza verificare la correttezza e senza eseguire l'escaping dei caratteri speciali. L'utilit\u00e0 resolvconf \u00e8 uno script shell che non controlla i dati in ingresso. Per sfruttare la vulnerabilit\u00e0, \u00e8 sufficiente inviare un pacchetto RA contenente un nome di dominio<\/a>, che include caratteri speciali, ad esempio \"test`id`test.\" La vulnerabilit\u00e0 \u00e8 stata corretta negli aggiornamenti FreeBSD 15.0-RELEASE-p1, 14.3-RELEASE-p7, 13.5-RELEASE-p8. <\/p>\n

Inoltre, negli aggiornamenti di FreeBSD 14.3-RELEASE-p7 e 13.5-RELEASE-p8 (il ramo 15.x non \u00e8 interessato) \u00e8 stata corretta la vulnerabilit\u00e0 (CVE-2025-14769) nel filtro pacchetti ipfw, che consente di causare un'interruzione del servizio inviando pacchetti appositamente formati. La vulnerabilit\u00e0 si manifesta solo quando si utilizza la direttiva \"tcp-setmss\" nelle regole ipfw. Il problema \u00e8 causato dal fatto che il gestore tcp-setmss, in determinate circostanze, pu\u00f2 liberare la memoria che contiene i dati ricevuti del pacchetto e restituire un errore. L'errore indicato veniva ignorato dal motore di elaborazione delle regole, il che portava a una successiva regola che poteva consentire il passaggio di un pacchetto il cui buffer di dati era gi\u00e0 stato liberato, causando un dereferenziamento di un puntatore nullo.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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. 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\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\udd47Vulnerabilit\u00e0 remota di root nel gestore di autoconfigurazione IPv6 in FreeBSD | ProHoster","description":"\u00c8 stata identificata una vulnerabilit\u00e0 (CVE-2025-14558) nei processi in background rtsold e nell'utilit\u00e0 rtsol di FreeBSD, che consente l'esecuzione remota di codice con privilegi di root tramite l'invio di un pacchetto appositamente formattato.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/news\/udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u0434\u0430\u043b\u0451\u043d\u043d\u0430\u044f root-\u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0435 \u0430\u0432\u0442\u043e\u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 IPv6 \u0432\u043e FreeBSD | ProHoster","og:description":"\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 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