{"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\/novosti-interneta\/udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd","title":{"rendered":"Risolta la vulnerabilit\u00e0 root nel gestore di autoconfigurazione IPv6 in FreeBSD.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nel processo in background rtsold e nell'utilit\u00e0 rtsol utilizzati in FreeBSD \u00e8 stata identificata una vulnerabilit\u00e0 (CVE-2025-14558) che consente l'esecuzione remota di codice con diritti di root mediante l'invio di un pacchetto specialmente formattato contenente un annuncio di router IPv6. 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 aggressore deve avere la capacit\u00e0 di inviare un pacchetto appositamente formattato da un sistema che si trova nella stessa rete del host vulnerabile. <\/p>\n

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

La vulnerabilit\u00e0 \u00e8 causata dal fatto che rtsold trasmette 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 verifica i dati in ingresso. Per sfruttare la vulnerabilit\u00e0, \u00e8 sufficiente inviare un pacchetto RA con un nome di dominio<\/a>, contenente caratteri speciali, come \"test`id`test. La vulnerabilit\u00e0 \u00e8 stata risolta negli aggiornamenti FreeBSD 15.0-RELEASE-p1, 14.3-RELEASE-p7, 13.5-RELEASE-p8. <\/p>\n

Inoltre, negli aggiornamenti FreeBSD 14.3-RELEASE-p7 e 13.5-RELEASE-p8 (il ramo 15.x non \u00e8 interessato), \u00e8 stata corretta una vulnerabilit\u00e0 (CVE-2025-14769) nel filtro dei pacchetti ipfw, che consente di generare un'interruzione del servizio inviando pacchetti appositamente formattati. La vulnerabilit\u00e0 si manifesta solo quando viene utilizzata la direttiva \u00abtcp-setmss\u00bb nelle regole ipfw. Il problema \u00e8 causato dal fatto che il gestore tcp-setmss, in determinate circostanze, pu\u00f2 liberare la memoria in cui sono memorizzati i dati ricevuti del pacchetto, restituendo un errore. Questo errore veniva ignorato dal motore di elaborazione delle regole, il che portava al permesso di passare un pacchetto il cui buffer di dati era gi\u00e0 stato liberato, causando il dereferenziazione 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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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, l'aggressore deve essere in grado di inviare un pacchetto formattato appositamente da un sistema.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/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 \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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