{"id":91998,"date":"2020-08-21T13:42:04","date_gmt":"2020-08-21T11:42:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-dns-servera-bind-9-11-22-9-16-6-9-17-4-s-ustraneniem-5-uyazvimostej"},"modified":"2020-08-21T13:42:04","modified_gmt":"2020-08-21T11:42:04","slug":"obnovlenie-dns-servera-bind-9-11-22-9-16-6-9-17-4-s-ustraneniem-5-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/obnovlenie-dns-servera-bind-9-11-22-9-16-6-9-17-4-s-ustraneniem-5-uyazvimostej","title":{"rendered":"Actualizarea serverului DNS BIND 9.11.22, 9.16.6, 9.17.4 cu remedierea a 5 vulnerabilit\u0103\u021bi","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\/msg00579.html\">Publicate<\/a><\/noindex> actualiz\u0103ri corective pentru versiunile stabile ale serverului DNS BIND 9.11.22 \u0219i 9.16.6, precum \u0219i pentru ramura experimental\u0103 aflat\u0103 \u00een dezvoltare 9.17.4. \u00cen noile versiuni au fost eliminate 5 vulnerabilit\u0103\u021bi. Cea mai periculoas\u0103 vulnerabilitate (<noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8620\">CVE-2020-8620<\/a><\/noindex>) <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.talosintelligence.com\/2020\/08\/vuln-spotlight-ISC-BIND-aug-2020.html\">permite<\/a><\/noindex> poate provoca de la distan\u021b\u0103 o \u00eentrerupere a serviciului prin trimiterea unui set specific de pachete c\u0103tre portul TCP pe care BIND \u00eel folose\u0219te pentru a accepta conexiuni. Trimiterea de cereri AXFR anormal de mari c\u0103tre portul TCP, <noindex><a rel=\"nofollow\" href=\"https:\/\/talosintelligence.com\/vulnerability_reports\/TALOS-2020-1100\">poate duce<\/a><\/noindex> poate duce la faptul c\u0103 biblioteca libuv care gestioneaz\u0103 conexiunea TCP va transmite serverului o dimensiune care activeaz\u0103 verificarea assertion \u0219i determin\u0103 terminarea procesului.<\/p>\n<p>Alte vulnerabilit\u0103\u021bi:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8621\">CVE-2020-8621<\/a><\/noindex> \u2014 atacatorul poate ini\u021bia declan\u0219area verific\u0103rii assertion \u0219i o oprire nea\u0219teptat\u0103 a rezolvatorului atunci c\u00e2nd \u00eencearc\u0103 s\u0103 minimizeze QNAME dup\u0103 redirec\u021bionarea cererii. Problema se manifest\u0103 doar pe serverele cu minimizarea QNAME activat\u0103, care func\u021bioneaz\u0103 \u00een modul \u2018forward first\u2019.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8622\">CVE-2020-8622<\/a><\/noindex> \u2014 atacatorul poate ini\u021bia declan\u0219area verific\u0103rii assertion \u0219i o oprire nea\u0219teptat\u0103 a procesului de lucru \u00een cazul \u00een care serverul DNS al atacatorului returneaz\u0103 r\u0103spunsuri incorecte semnate TSIG, ca r\u0103spuns la cererea serverului DNS al victimei.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8623\">CVE-2020-8623<\/a><\/noindex> \u2014 atacatorul poate ini\u021bia declan\u0219area verific\u0103rii assertion \u0219i o oprire nea\u0219teptat\u0103 a handler-ului prin trimiterea de cereri de zon\u0103 formulate special, semnate cu cheia RSA. Problema se manifest\u0103 doar atunci c\u00e2nd serverul este compilat cu op\u021biunea \u2018\u2014enable-native-pkcs11\u2019.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8624\">CVE-2020-8624<\/a><\/noindex> \u2014 atacatorul, care are permisiunea de a modifica con\u021binutul anumitor c\u00e2mpuri \u00een zonele DNS, poate ob\u021bine privilegii suplimentare pentru a modifica alte con\u021binuturi ale zonei DNS.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53577\">opennet.ro<\/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 9.11.22 \u0438 9.16.6, \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 9.17.4. \u0412 \u043d\u043e\u0432\u044b\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e 5 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-8620) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \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 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u043d\u0430\u0431\u043e\u0440\u0430 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u043d\u0430 TCP-\u043f\u043e\u0440\u0442, \u043d\u0430 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u0438\u043d\u0438\u043c\u0430\u0435\u0442 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f BIND. \u041e\u0442\u043f\u0440\u0430\u0432\u043a\u0430 \u043d\u0430 TCP-\u043f\u043e\u0440\u0442 \u0430\u043d\u043e\u043c\u0430\u043b\u044c\u043d\u043e \u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 AXFR, \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\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-91998","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - 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 9.11.22 \u0438 9.16.6, \u0430.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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