{"id":99192,"date":"2021-02-18T10:23:05","date_gmt":"2021-02-18T08:23:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-dns-servere-bind-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda"},"modified":"2021-02-18T10:23:05","modified_gmt":"2021-02-18T08:23:05","slug":"uyazvimost-v-dns-servere-bind-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimost-v-dns-servere-bind-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda","title":{"rendered":"Vulnerabilit\u00e0 nel server DNS BIND che consente l'esecuzione remota di codice","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Sono stati pubblicati aggiornamenti correttivi per le versioni stabili del server DNS BIND 9.11.28 e 9.16.12, insieme a una versione sperimentale in fase di sviluppo, la 9.17.10. Nei nuovi rilasci \u00e8 stata corretta una vulnerabilit\u00e0 (CVE-2020-8625) che provoca un overflow del buffer e potrebbe potenzialmente portare all'esecuzione remota di codice da parte di un attaccante. Finora non sono state trovate prove di exploit funzionanti. <\/p>\n

Il problema \u00e8 causato da un errore nell'implementazione del meccanismo SPNEGO (Simple and Protected GSSAPI Negotiation Mechanism), utilizzato nel GSSAPI per il coordinamento dei metodi di protezione utilizzati dal client e server<\/a> dei metodi di protezione. Il GSSAPI \u00e8 utilizzato come protocollo di alto livello per lo scambio sicuro delle chiavi tramite l'estensione GSS-TSIG, impiegata durante il processo di autenticazione degli aggiornamenti dinamici delle zone DNS. <\/p>\n

La vulnerabilit\u00e0 riguarda i sistemi la cui configurazione include l'uso di GSS-TSIG (ad esempio, se sono utilizzate le impostazioni tkey-gssapi-keytab e tkey-gssapi-credential). Il GSS-TSIG \u00e8 generalmente utilizzato in ambienti misti in cui BIND viene combinato con controller di dominio<\/a> Active Directory, o durante l'integrazione con Samba. Nella configurazione predefinita, GSS-TSIG \u00e8 disabilitato. <\/p>\n

Come soluzione alternativa al problema di blocco, senza disabilitare GSS-TSIG, si propone di compilare BIND senza il supporto del meccanismo SPNEGO, che pu\u00f2 essere disabilitato specificando al momento dell'esecuzione dello script \u00abconfigure\u00bb l'opzione \u00ab--disable-isc-spnego\u00bb. Nei pacchetti la problematica rimane ancora irrisolta. Puoi tenere d'occhio il rilascio degli aggiornamenti sulle seguenti pagine: Debian, RHEL, SUSE, Ubuntu, Fedora, Arch Linux, FreeBSD, NetBSD.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0445 \u0432\u0435\u0442\u043e\u043a DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 BIND 9.11.28 \u0438 9.16.12, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043d\u0430\u0445\u043e\u0434\u044f\u0449\u0435\u0439\u0441\u044f \u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 9.17.10. \u0412 \u043d\u043e\u0432\u044b\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-8625), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0431\u0443\u0444\u0435\u0440\u0430 \u0438 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u0430\u044f \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 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0430. \u0421\u043b\u0435\u0434\u043e\u0432 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u0440\u0430\u0431\u043e\u0447\u0438\u0445 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u043e\u0432 \u043f\u043e\u043a\u0430 \u043d\u0435 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 SPNEGO (Simple and Protected GSSAPI […]<\/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-99192","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"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\udd47 Vulnerabilit\u00e0 nel server DNS BIND, che consente l'esecuzione remota di codice | ProHoster","description":"Sono stati pubblicati aggiornamenti correttivi per le versioni stabili del server DNS BIND 9.11.28 e 9.16.12, oltre alla versione sperimentale in fase di sviluppo 9.17.10. Negli ultimi rilasci \u00e8 stata corretta una vulnerabilit\u00e0 (CVE-2020-8625) che causa un overflow del buffer e potrebbe potenzialmente portare all'esecuzione remota di codice da parte di un malintenzionato. Finora non sono stati trovati exploit funzionanti. Il problema \u00e8 causato da un errore nell'implementazione del meccanismo SPNEGO (Simple and Protected GSSAPI).","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimost-v-dns-servere-bind-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda","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\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0435 BIND, \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0430\u044f 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