{"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\/et\/blog\/novosti-interneta\/udalyonnaya-root-uyazvimost-v-obrabotchike-avtokonfiguraczii-ipv6-vo-freebsd","title":{"rendered":"FreeBSD-s on eemaldatud root-haavatavus IPv6 automaatkonfiguratsiooni t\u00f6\u00f6tlejas.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

FreeBSD-s rakendatud rtsold taustprotsessis ja rtsol utiliidis avastati haavatavus (CVE-2025-14558), mis v\u00f5imaldab kaugkoodi t\u00e4itmist root-i \u00f5igustes, saates spetsiaalselt vormindatud IPv6-suunamise reklaampakette. RA-\u00f5numid (Router Advertisement), mille kaudu haavatavust \u00e4rakasutatakse, ei suunata ja peaksid routerite poolt \u00e4ra viskama. R\u00fcnnaku sooritamiseks peab r\u00fcndajal olema v\u00f5imalus spetsiaalselt vormindatud pakett saata s\u00fcsteemist, mis asub samas v\u00f5rgusegmendis haavatava peremehega. <\/p>\n

Taustprotsess rtsold kasutatakse peremeestel automaatse IPv6-\u00fchenduse seadistamiseks SLAAC (StateLess Address AutoConfiguration) mehhanismi abil. Peremees saadab ICMPv6 s\u00f5numi RS (Router Solicitation) multicasti re\u017eiimis ja ootab vastavaid RA-s\u00f5numeid (Router Advertisement) ruuteritest, mis sisaldavad teavet v\u00f5rguprefiksite ja seadistamisparameetrite kohta. Rtsol utiliit rakendab sarnast funktsionaalsust ilma taustprotsessi k\u00e4ivitamata. <\/p>\n

Haavatavus tuleneb sellest, et rtsold edastab RA-s\u00f5numis m\u00e4\u00e4ratud \u00abdomain search\u00bb nimekirja resolvconf utiliidile ilma sobivuse kontrollita ja erim\u00e4rkide eest hoolitsemata. Resolconf utiliit on shell-skript, mis ei kontrolli sisendandmeid. Haavatavuse \u00e4rakasutamiseks piisab, kui saata RA-pakett, mille nimi domeeni<\/a>, sisaldab erim\u00e4rke, n\u00e4iteks \u00abtest`id`test. Haavatavus on k\u00f5rvaldatud FreeBSD 15.0-RELEASE-p1, 14.3-RELEASE-p7, 13.5-RELEASE-p8 v\u00e4rskendustes. <\/p>\n

Lisaks on FreeBSD 14.3-RELEASE-p7 ja 13.5-RELEASE-p8 uuendustes (15.x haru see probleem ei puuduta) k\u00f5rvaldatud haavatavus (CVE-2025-14769) ipfw pakettfiltris, mis v\u00f5imaldab teenuse osutamise katkestamist spetsiaalselt vormistatud pakettide saatmise kaudu. Haavatavus avaldub ainult ipfw reeglites direktiivi \u00abtcp-setmss\u00bb kasutamisel. Probleem tuleneb sellest, et tcp-setmss t\u00f6\u00f6tleja v\u00f5ib teatud asjaoludel vabastada m\u00e4lu, kus hoitakse vastuv\u00f5etud pakketeavet, ja tagastada vea. Antud viga ignoreeriti reeglite t\u00f6\u00f6tlemise mootoris, mist\u00f5ttu j\u00e4rgmine reegel v\u00f5is lubada paketi l\u00e4bimist, mille andmed olid juba vabastatud, mis viis nullviidatud dereferentsini.
\n
Allikas: 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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RA-s\u00f5numid (Router Advertisement), mille kaudu haavatavust \u00e4ra kasutatakse, ei marsuudi ja peavad marsruuterite poolt tagasi l\u00fckkama. 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