{"id":100060,"date":"2021-04-29T16:22:40","date_gmt":"2021-04-29T14:22:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/novye-versii-samba-4-14-4-4-13-8-i-4-12-15-s-ustraneniem-uyazvimosti"},"modified":"2021-04-29T16:22:40","modified_gmt":"2021-04-29T14:22:40","slug":"novye-versii-samba-4-14-4-4-13-8-i-4-12-15-s-ustraneniem-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/novye-versii-samba-4-14-4-4-13-8-i-4-12-15-s-ustraneniem-uyazvimosti","title":{"rendered":"Nuove versioni di Samba 4.14.4, 4.13.8 e 4.12.15 con correzione delle vulnerabilit\u00e0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Sono stati preparati aggiornamenti correttivi per i pacchetti Samba 4.14.4, 4.13.8 e 4.12.15 che risolvono una vulnerabilit\u00e0 (CVE-2021-20254), che nella maggior parte dei casi pu\u00f2 causare il crash del processo smbd, ma nel peggiore dei casi non esclude la possibilit\u00e0 di accesso non autorizzato a file e la cancellazione di file da parte di un utente non privilegiato su una condivisione di rete. <\/p>\n

La vulnerabilit\u00e0 \u00e8 causata da un errore nella funzione sids_to_unixids(), che porta alla lettura di dati al di fuori del buffer durante la conversione degli identificatori di gruppo SID (Windows Security Identifier) in GID (Unix Group ID). Il problema si verifica in caso di aggiunta di un elemento negativo nella cache delle corrispondenze SID in GID. Gli sviluppatori di Samba non sono stati in grado di identificare condizioni affidabili e ripetibili per l'emergere della vulnerabilit\u00e0, ma il ricercatore che ha individuato la vulnerabilit\u00e0 ritiene che il problema possa essere sfruttato per eliminare file su un server<\/a> sistema senza i diritti adeguati per eseguire questa operazione.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.14.4, 4.13.8 \u0438 4.12.15 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2021-20254), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u043b\u0443\u0447\u0430\u0435\u0432 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043a\u0440\u0430\u0445\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 smbd, \u043d\u043e \u0432 \u043d\u0430\u0438\u0445\u0443\u0434\u0448\u0435\u043c \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u0438 \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043d\u0435\u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0444\u0430\u0439\u043b\u0430\u043c \u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u0444\u0430\u0439\u043b\u043e\u0432 \u043d\u0430 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u0440\u0430\u0437\u0434\u0435\u043b\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 sids_to_unixids(), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u0447\u0442\u0435\u043d\u0438\u044e \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u0437\u0430 […]<\/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-100060","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\udd47Nuove versioni di Samba 4.14.4, 4.13.8 e 4.12.15 con risoluzione della vulnerabilit\u00e0 | ProHoster","description":"Sono stati rilasciati gli aggiornamenti correttivi per i pacchetti Samba 4.14.4, 4.13.8 e 4.12.15 che risolvono una vulnerabilit\u00e0 (CVE-2021-20254), la quale pu\u00f2 causare il crash del processo smbd nella maggior parte dei casi, ma nel peggiore degli scenari non esclude la possibilit\u00e0 di accesso non autorizzato ai file e di eliminazione di file da parte di utenti non privilegiati su una condivisione di rete. La vulnerabilit\u00e0 \u00e8 causata da un errore nella funzione sids_to_unixids(), che porta alla lettura di dati al di fuori dell'area prevista.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/novye-versii-samba-4-14-4-4-13-8-i-4-12-15-s-ustraneniem-uyazvimosti","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\u041d\u043e\u0432\u044b\u0435 \u0432\u0435\u0440\u0441\u0438\u0438 Samba 4.14.4, 4.13.8 \u0438 4.12.15 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 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