{"id":103567,"date":"2022-03-19T09:36:48","date_gmt":"2022-03-19T07:36:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-dns-servera-bind-9-11-37-9-16-27-i-9-18-1-c-ustraneniem-4-uyazvimostej"},"modified":"2022-03-19T09:36:48","modified_gmt":"2022-03-19T07:36:48","slug":"obnovlenie-dns-servera-bind-9-11-37-9-16-27-i-9-18-1-c-ustraneniem-4-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/obnovlenie-dns-servera-bind-9-11-37-9-16-27-i-9-18-1-c-ustraneniem-4-uyazvimostej","title":{"rendered":"Aggiornamento del server DNS BIND 9.11.37, 9.16.27 e 9.18.1 con la risoluzione di 4 vulnerabilit\u00e0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Sono stati pubblicati aggiornamenti correttivi per le versioni stabili del server DNS BIND 9.11.37, 9.16.27 e 9.18.1, nei quali sono state risolte quattro vulnerabilit\u00e0:    <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-25220 \u2014 possibilit\u00e0 di sostituire record NS non corretti nella cache del server DNS (avvelenamento della cache), che pu\u00f2 portare a richieste ai server DNS errati, fornendo informazioni false. Il problema si manifesta nei resolver che operano in modalit\u00e0 \u00abforward first\u00bb (predefinita) o \u00abforward only\u00bb, in caso di compromissione di uno dei forwarder (i record NS ricevuti dal forwarder si accumulano nella cache e possono portare a richieste non al server DNS corretto durante l'esecuzione di richieste ricorsive).\n<li class=\"l\"> CVE-2022-0396 \u2014 attacco di negazione del servizio (blocco infinito delle connessioni in stato CLOSE_WAIT), avviato tramite l'invio di pacchetti TCP specificamente formattati. Il problema si manifesta solo quando \u00e8 attivata l'impostazione keep-response-order, che non \u00e8 utilizzata per impostazione predefinita, e anche quando nell'ACL \u00e8 specificata l'opzione keep-response-order.\n<li class=\"l\"> CVE-2022-0635 \u2014 possibilit\u00e0 di crash del processo named tramite l'invio di richieste specifiche a <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-shicago\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2907\">server<\/a>. Il problema si manifesta nell'utilizzo della cache delle richieste DNSSEC verificate (DNSSEC-Validated Cache), che \u00e8 attivata di default nella versione 9.18 (impostazioni dnssec-validation e synth-from-dnssec).\n<li class=\"l\"> CVE-2022-0667 \u2014 possibilit\u00e0 di crash del processo named durante l'elaborazione delle richieste DS in sospeso. Il problema si manifesta solo nel ramo BIND 9.18 ed \u00e8 causato da un errore commesso durante la revisione del codice client per l'elaborazione ricorsiva delle richieste.    <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56879\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 9.11.37, 9.16.27 \u0438 9.18.1, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0447\u0435\u0442\u044b\u0440\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2021-25220 &#8212; \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u0445 NS-\u0437\u0430\u043f\u0438\u0441\u0435\u0439 \u0432 \u043a\u044d\u0448 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 (\u043e\u0442\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043a\u044d\u0448\u0430), \u0447\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a \u043d\u0435\u0432\u0435\u0440\u043d\u044b\u043c DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430\u043c, \u043e\u0442\u0434\u0430\u044e\u0449\u0438\u043c \u043b\u043e\u0436\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0440\u0435\u0437\u043e\u043b\u0432\u0435\u0440\u0430\u0445, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0445 \u0432 \u0440\u0435\u0436\u0438\u043c\u0430\u0445 &#171;forward first&#187; (\u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e) \u0438\u043b\u0438 &#171;forward only&#187;, \u0432 \u0443\u0441\u043b\u043e\u0432\u0438\u0438 \u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0430\u0446\u0438\u0438 [&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-103567","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 - 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