{"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\/hu\/blog\/news\/obnovlenie-dns-servera-bind-9-11-22-9-16-6-9-17-4-s-ustraneniem-5-uyazvimostej","title":{"rendered":"A BIND 9.11.22, 9.16.6, 9.17.4 DNS-szerver friss\u00edt\u00e9se 5 sebezhet\u0151s\u00e9g kijav\u00edt\u00e1s\u00e1val","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\">Megjelentek<\/a><\/noindex> A stabil DNS-szerver BIND 9.11.22 \u00e9s 9.16.6, valamint a fejleszt\u00e9s alatt \u00e1ll\u00f3 k\u00eds\u00e9rleti \u00e1g 9.17.4 hibajav\u00edt\u00f3 friss\u00edt\u00e9sei \u00e9rkeztek. Az \u00faj kiad\u00e1sokban 5 sebezhet\u0151s\u00e9get h\u00e1r\u00edtottak el. A legvesz\u00e9lyesebb sebezhet\u0151s\u00e9g (<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\">MMM-DD-YYYY<\/a><\/noindex> t\u00e1volr\u00f3l szolg\u00e1ltat\u00e1smegtagad\u00e1st okozhat, ha a BIND kapcsolatait fogad\u00f3 TCP-portj\u00e1ra egy meghat\u00e1rozott csomagk\u00e9szletet k\u00fcldenek. Az anom\u00e1lisan nagy AXFR k\u00e9r\u00e9sek a TCP-portra <noindex><a rel=\"nofollow\" href=\"https:\/\/talosintelligence.com\/vulnerability_reports\/TALOS-2020-1100\">arra vezethetnek<\/a><\/noindex> hogy a TCP-kapcsolatot kezel\u0151 libuv k\u00f6nyvt\u00e1r egy m\u00e9retet k\u00f6zvet\u00edt a szervernek, amely az \u00e1llapotellen\u0151rz\u00e9st kiv\u00e1ltja \u00e9s le\u00e1ll\u00edtja a folyamatot.<\/p>\n<p>Egy\u00e9b sebezhet\u0151s\u00e9gek:<\/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 A t\u00e1mad\u00f3 elind\u00edthatja az assertion ellen\u0151rz\u00e9s\u00e9nek aktiv\u00e1l\u00e1s\u00e1t \u00e9s a resolver s\u00fcrg\u0151ss\u00e9gi le\u00e1ll\u00edt\u00e1s\u00e1t, amikor megpr\u00f3b\u00e1lja minimaliz\u00e1lni a QNAME-t a lek\u00e9rdez\u00e9s \u00e1tir\u00e1ny\u00edt\u00e1sa ut\u00e1n. A probl\u00e9ma csak olyan szervereken jelentkezik, ahol a QNAME minimaliz\u00e1l\u00e1s enged\u00e9lyezve van, \u00e9s amelyek \u2018forward first\u2019 m\u00f3dban m\u0171k\u00f6dnek.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8622\">CVE-2020-8622<\/a><\/noindex> \u2014 A t\u00e1mad\u00f3 elind\u00edthatja az assertion ellen\u0151rz\u00e9s\u00e9nek aktiv\u00e1l\u00e1s\u00e1t \u00e9s a munkafolyamat s\u00fcrg\u0151ss\u00e9gi le\u00e1ll\u00edt\u00e1s\u00e1t, ha a t\u00e1mad\u00f3 DNS-szervere helytelen TSIG al\u00e1\u00edr\u00e1ssal v\u00e1laszol a c\u00e9l DNS-szerver\u00e9nek lek\u00e9rdez\u00e9s\u00e9re.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8623\">CVE-2020-8623<\/a><\/noindex> \u2014 A t\u00e1mad\u00f3 elind\u00edthatja az assertion ellen\u0151rz\u00e9s\u00e9nek aktiv\u00e1l\u00e1s\u00e1t \u00e9s a kezel\u0151 s\u00fcrg\u0151ss\u00e9gi le\u00e1ll\u00edt\u00e1s\u00e1t, ha k\u00fcl\u00f6n\u00f6sen megform\u00e1lt z\u00f3nak\u00e9r\u00e9seket k\u00fcld, amelyek RSA kulccsal vannak al\u00e1\u00edrva. A probl\u00e9ma csak olyan szerver-\u00f6ssze\u00e1ll\u00edt\u00e1sn\u00e1l jelentkezik, amelyn\u00e9l az \u2018\u2014enable-native-pkcs11\u2019 opci\u00f3 enged\u00e9lyezve van.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kb.isc.org\/docs\/cve-2020-8624\">CVE-2020-8624<\/a><\/noindex> \u2014 A t\u00e1mad\u00f3, aki jogosults\u00e1gokkal rendelkezik bizonyos mez\u0151k tartalm\u00e1nak m\u00f3dos\u00edt\u00e1s\u00e1ra a DNS-z\u00f3n\u00e1kban, tov\u00e1bbi privil\u00e9giumokat szerezhet m\u00e1s DNS-z\u00f3na tartalom megv\u00e1ltoztat\u00e1s\u00e1ra.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53577\">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 9.11.22 \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 5.0.3 - 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 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