{"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\/pl\/blog\/news\/udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd","title":{"rendered":"Zdalna podatno\u015b\u0107 typu root w obs\u0142udze automatycznej konfiguracji IPv6 w FreeBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W dzia\u0142aj\u0105cym w FreeBSD procesie w tle rtsold i narz\u0119dziu rtsol zidentyfikowano podatno\u015b\u0107 (CVE-2025-14558), kt\u00f3ra umo\u017cliwia zdalne wykonanie kodu z uprawnieniami roota poprzez wys\u0142anie specjalnie przygotowanego pakietu z og\u0142oszeniem routera IPv6. Wiadomo\u015bci RA (Router Advertisement), przez kt\u00f3re wykorzystywana jest podatno\u015b\u0107, nie s\u0105 routowane i powinny by\u0107 odrzucane przez routery. Aby przeprowadzi\u0107 atak, napastnik musi mie\u0107 mo\u017cliwo\u015b\u0107 wys\u0142ania specjalnie skonstruowanego pakietu z systemu znajduj\u0105cego si\u0119 w tym samym segmencie sieciowym co podatny host. <\/p>\n

Proces w tle rtsold stosowany jest na hostach do automatycznej konfiguracji po\u0142\u0105czenia przez IPv6 przy u\u017cyciu mechanizmu SLAAC (StateLess Address AutoConfiguration). Host wysy\u0142a wiadomo\u015b\u0107 ICMPv6 RS (Router Solicitation) w trybie multicast i czeka na odpowied\u017a w postaci wiadomo\u015bci RA (Router Advertisement) od router\u00f3w, kt\u00f3re zawieraj\u0105 informacje o prefiksach sieciowych i parametrach konfiguracji. Narz\u0119dzie rtsol realizuje podobne funkcje bez uruchamiania procesu w tle. <\/p>\n

Podatno\u015b\u0107 ta wynika z tego, \u017ce rtsold przekazuje wskazany w wiadomo\u015bci RA list\u0119 \u201edomain search\u201d do narz\u0119dzia resolvconf bez weryfikacji poprawno\u015bci i bez odpowiedniego oczyszczania specjalnych znak\u00f3w. Narz\u0119dzie resolvconf jest skryptem shell, kt\u00f3ry nie kontroluje danych wej\u015bciowych. Aby wykorzysta\u0107 t\u0119 podatno\u015b\u0107, wystarczy wys\u0142a\u0107 pakiet RA z nazw\u0105 domeny<\/a>, zawieraj\u0105c\u0105 znaki specjalne, na przyk\u0142ad \u201etest`id`test. Podatno\u015b\u0107 zosta\u0142a usuni\u0119ta w aktualizacjach FreeBSD 15.0-RELEASE-p1, 14.3-RELEASE-p7, 13.5-RELEASE-p8. <\/p>\n

Ponadto w aktualizacjach FreeBSD 14.3-RELEASE-p7 i 13.5-RELEASE-p8 (problem nie dotyczy ga\u0142\u0119zi 15.x) usuni\u0119to podatno\u015b\u0107 (CVE-2025-14769) w filtrze pakiet\u00f3w ipfw, co pozwala na wywo\u0142anie odmowy us\u0142ugi poprzez wysy\u0142anie specjalnie przygotowanych pakiet\u00f3w. Wada ta pojawia si\u0119 tylko przy u\u017cyciu dyrektywy \u201etcp-setmss\u201d w regu\u0142ach ipfw. Problem polega na tym, \u017ce procesor tcp-setmss w okre\u015blonych okoliczno\u015bciach mo\u017ce zwolni\u0107 pami\u0119\u0107, w kt\u00f3rej przechowywane s\u0105 odebrane dane pakietu, i zwr\u00f3ci\u0107 b\u0142\u0105d. Wskazana b\u0142\u0105d by\u0142a ignorowana przez silnik przetwarzania regu\u0142, przez co nast\u0119pna regu\u0142a mog\u0142a zezwoli\u0107 na przej\u015bcie pakietu, kt\u00f3rego dane ju\u017c zosta\u0142y zwolnione, co prowadzi do dereferencji wska\u017anika zerowego.
\n
\u0179r\u00f3d\u0142o: 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\udd47Usuni\u0119ta luka typu root w obs\u0142udze autokonfiguracji IPv6 w FreeBSD | ProHoster","description":"W u\u017cywanych w FreeBSD procesach w tle rtsold i narz\u0119dziu rtsol zidentyfikowano luk\u0119 (CVE-2025-14558), kt\u00f3ra pozwala na zdalne wykonywanie kodu z uprawnieniami roota poprzez wys\u0142anie specjalnie sformatowanej paczki c.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","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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