{"id":105776,"date":"2022-12-01T15:37:11","date_gmt":"2022-12-01T13:37:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-root-uyazvimost-v-utilite-ping-postavlyaemoj-vo-freebsd"},"modified":"2022-12-01T15:37:11","modified_gmt":"2022-12-01T13:37:11","slug":"udalyonno-ekspluatiruemaya-root-uyazvimost-v-utilite-ping-postavlyaemoj-vo-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/udalyonno-ekspluatiruemaya-root-uyazvimost-v-utilite-ping-postavlyaemoj-vo-freebsd","title":{"rendered":"Vulnerabilit\u00e0 root sfruttabile da remoto nell'utilit\u00e0 ping fornita con FreeBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>In FreeBSD \u00e8 stata identificata una vulnerabilit\u00e0 (CVE-2022-23093) nell'utilit\u00e0 ping inclusa nella distribuzione di base. Il problema potrebbe potenzialmente portare all'esecuzione remota di codice con privilegi di root quando si verifica un ping di un host esterno sotto il controllo di un attaccante. La correzione \u00e8 stata proposta negli aggiornamenti FreeBSD 13.1-RELEASE-p5, 12.4-RC2-p2 e 12.3-RELEASE-p10. Non \u00e8 ancora chiaro se altre BSD siano affette dalla vulnerabilit\u00e0 identificata (finora non ci sono stati resoconti di vulnerabilit\u00e0 in NetBSD, DragonFlyBSD e OpenBSD).      <\/p>\n<p>La vulnerabilit\u00e0 \u00e8 causata da un buffer overflow nel codice di parsing dei messaggi ICMP che arrivano in risposta a una richiesta di verifica. Il codice di invio e ricezione dei messaggi ICMP in ping utilizza raw socket ed \u00e8 eseguito con privilegi elevati (l'utilit\u00e0 viene fornita con il flag setuid root). La gestione della risposta avviene sul lato ping attraverso la ricostruzione degli header IP e ICMP dei pacchetti, ottenuti dal raw socket. Gli header IP e ICMP allocati vengono copiati dalla funzione pr_pack() nei buffer, senza tenere conto del fatto che nel pacchetto dopo l'intestazione IP potrebbero essere presenti ulteriori header estesi.     <\/p>\n<p>Questi header vengono estratti dal pacchetto e inclusi nel blocco degli header, ma non vengono considerati nel calcolo della dimensione del buffer. Se l'host risponde alla richiesta ICMP inviata con un pacchetto contenente header aggiuntivi, il loro contenuto verr\u00e0 scritto in un'area al di fuori del buffer nello stack. Di conseguenza, un attaccante pu\u00f2 sovrascrivere fino a 40 byte di dati nello stack, il che consente potenzialmente l'esecuzione del proprio codice. Il rischio del problema \u00e8 mitigato dal fatto che, nel momento in cui si manifesta l'errore, il processo si trova in uno stato di isolamento delle chiamate di sistema (modalit\u00e0 di capacit\u00e0), il che rende difficile accedere al resto del sistema dopo l'esploitazione della vulnerabilit\u00e0.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58232\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e FreeBSD \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-23093) \u0432 \u0443\u0442\u0438\u043b\u0438\u0442\u0435 ping, \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0432 \u0431\u0430\u0437\u043e\u0432\u0443\u044e \u043f\u043e\u0441\u0442\u0430\u0432\u043a\u0443. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u043c\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \u043f\u0440\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0435 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 ping \u0432\u043d\u0435\u0448\u043d\u0435\u0433\u043e \u0445\u043e\u0441\u0442\u0430, \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u043e\u0433\u043e \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043e \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 FreeBSD 13.1-RELEASE-p5, 12.4-RC2-p2 \u0438 12.3-RELEASE-p10. \u041f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u043b\u0438 \u0434\u0440\u0443\u0433\u0438\u0435 BSD-\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u043a\u0430 \u043d\u0435 \u044f\u0441\u043d\u043e (\u043e\u0442\u0447\u0451\u0442\u043e\u0432 \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 NetBSD, [&hellip;]<\/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-105776","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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