{"id":35485,"date":"2019-10-31T22:04:36","date_gmt":"2019-10-31T19:04:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/obnovlenie-dns-servera-bind-9-14-3-9-11-8-9-15-1-s-ustraneniem-dos-uyazvimosti\/"},"modified":"2019-10-31T22:04:36","modified_gmt":"2019-10-31T19:04:36","slug":"obnovlenie-dns-servera-bind-9-14-3-9-11-8-9-15-1-s-ustraneniem-dos-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/obnovlenie-dns-servera-bind-9-14-3-9-11-8-9-15-1-s-ustraneniem-dos-uyazvimosti","title":{"rendered":"Aggiornamento del server DNS BIND 9.14.3, 9.11.8, 9.15.1 con correzione di vulnerabilit\u00e0 DoS.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/bind-announce@lists.isc.org\/msg00547.html\">Pubblicati<\/a><\/noindex> Aggiornamenti correttivi per i rami stabili del server DNS BIND 9.14.3, 9.11.8 e 9.12.4-P2, cos\u00ec come per il ramo sperimentale in fase di sviluppo 9.15.1. Contestualmente, \u00e8 stata annunciata la cessazione del supporto per il ramo 9.12, per il quale non verranno pi\u00f9 rilasciati aggiornamenti. <\/p>\n<p>Le aggiornamenti sono rilevanti per la rimozione di <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2019-6471\">vulnerabilit\u00e0<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-6471\">CVE-2019-6471<\/a><\/noindex>), che consente di provocare un'interruzione del servizio (terminazione del processo con assertion REQUIRE). Il problema \u00e8 causato da una condizione di gara (race condition) che si verifica durante l'elaborazione di un numero molto elevato di pacchetti in ingresso appositamente formattati, che rientrano nel filtro di blocco. Per sfruttare la vulnerabilit\u00e0, un attaccante deve inviare al resolver della vittima un numero elevato di richieste, che portano a contatti con il server DNS dell'attaccante, il quale restituisce risposte errate.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50910\">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 9.14.3, 9.11.8 \u0438 9.12.4-P2, \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 9.15.1. \u041e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u043e\u0431\u044a\u044f\u0432\u043b\u0435\u043d\u043e \u043e \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0438 \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0435\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0432\u0435\u0442\u043a\u0438 9.12, \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0431\u043e\u043b\u044c\u0448\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0442\u044c\u0441\u044f \u043d\u0435 \u0431\u0443\u0434\u0443\u0442. \u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u044b \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2019-6471), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438 (\u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u0435 \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 \u0441 assertion REQUIRE). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c \u0433\u043e\u043d\u043a\u0438 (race [&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-35485","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\" content=\"\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 9.14.3, 9.11.8 \u0438.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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