Sono stati pubblicati aggiornamenti correttivi per il pacchetto Samba 4.14.4, 4.13.8 e 4.12.15 per risolvere una vulnerabilit\u00e0 (CVE-2021-20254), che nella maggior parte dei casi pu\u00f2 portare al crash del processo smbd, ma nel peggiore dei casi non si esclude la possibilit\u00e0 di accesso non autorizzato ai file e di eliminazione di file da parte di utenti non privilegiati sulla 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 dei confini del buffer durante la conversione degli identificatori di gruppo SID (Windows Security Identifier) in GID (Unix Group ID). Il problema si verifica quando un elemento negativo viene aggiunto alla cache delle corrispondenze SID in GID. Gli sviluppatori di Samba non sono riusciti a identificare condizioni affidabili e ripetibili per il verificarsi della vulnerabilit\u00e0, ma il ricercatore che ha scoperto la vulnerabilit\u00e0 ritiene che il problema possa essere sfruttato per eliminare file senza i diritti adeguati per eseguire questa operazione. server<\/a> senza i diritti adeguati per eseguire questa operazione. \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-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\udd47Nuove versioni Samba 4.14.4, 4.13.8 e 4.12.15 con risoluzione della vulnerabilit\u00e0 | ProHoster","description":"Sono stati pubblicati aggiornamenti correttivi per il pacchetto Samba 4.14.4, 4.13.8 e 4.12.15 per risolvere una vulnerabilit\u00e0 (CVE-2021-20254), che nella maggior parte dei casi pu\u00f2 portare al crash del processo smbd, ma nel peggiore dei casi 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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"