{"id":95506,"date":"2020-09-30T13:42:15","date_gmt":"2020-09-30T11:42:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-powerdns-authoritative-server"},"modified":"2020-09-30T13:42:15","modified_gmt":"2020-09-30T11:42:15","slug":"uyazvimosti-v-powerdns-authoritative-server","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/uyazvimosti-v-powerdns-authoritative-server","title":{"rendered":"Sicherheitsanf\u00e4lligkeiten im PowerDNS Authoritative Server","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/blog.powerdns.com\/2020\/09\/22\/powerdns-authoritative-4-3-1-4-2-3-and-4-1-14\/\">Verf\u00fcgbar<\/a><\/noindex> Aktualisierungen des autoritativen (authoritative) DNS-Servers <noindex><a rel=\"nofollow\" href=\"https:\/\/www.powerdns.com\/\">PowerDNS Authoritative Server 4.3.1, 4.2.3 und 4.1.14<\/a><\/noindex>, in denen <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/09\/22\/11\">wurden<\/a><\/noindex> vier Schwachstellen, von denen zwei m\u00f6glicherweise zu einer Remote-Codeausf\u00fchrung durch einen Angreifer f\u00fchren k\u00f6nnen.<\/p>\n<p>Die Schwachstellen CVE-2020-24696, CVE-2020-24697 und CVE-2020-24698<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/docs.powerdns.com\/authoritative\/security-advisories\/powerdns-advisory-2020-06.html\">betreffen<\/a><\/noindex> Code mit der Implementierung des Schl\u00fcsselaustauschmechanismus <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Generic_Security_Service_Algorithm_for_Secret_Key_Transaction\">GSS-TSIG<\/a><\/noindex>. Sicherheitsanf\u00e4lligkeiten treten nur auf, wenn PowerDNS mit Unterst\u00fctzung f\u00fcr GSS-TSIG (&#171;&#8212;enable-experimental-gss-tsig&#187;, standardm\u00e4\u00dfig nicht verwendet) kompiliert wird und k\u00f6nnen durch das Senden eines speziell formatierten Netzwerkpakets ausgenutzt werden. Die Sicherheitsanf\u00e4lligkeiten CVE-2020-24696 und CVE-2020-24698, verursacht durch ein Race Condition und doppelte Speicherfreigabe (double-free), k\u00f6nnen zum Absturz oder zur Ausf\u00fchrung des Codes des Angreifers bei der Verarbeitung von Anfragen mit fehlerhaft formatierten GSS-TSIG-Bescheinigungen f\u00fchren. Die Sicherheitsanf\u00e4lligkeit CVE-2020-24697 f\u00fchrt lediglich zu einem Denial of Service. Da der GSS-TSIG-Code standardm\u00e4\u00dfig nicht verwendet wurde, sowohl in den Distributionspaketen als auch potenziell andere Probleme aufweist, wurde beschlossen, ihn vollst\u00e4ndig aus der Version PowerDNS Authoritative 4.4.0 zu entfernen.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/docs.powerdns.com\/authoritative\/security-advisories\/powerdns-advisory-2020-05.html\">CVE-2020-17482<\/a><\/noindex> kann zu Informationslecks aus nicht initialisiertem Speicher des Prozesses f\u00fchren, tritt jedoch nur bei der Verarbeitung von Anfragen von authentifizierten Benutzern auf, die die M\u00f6glichkeit haben, neue Eintr\u00e4ge in den von dem DNS-Server verwalteten Zonen hinzuzuf\u00fcgen.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Quelle: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53806\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0430\u0432\u0442\u043e\u0440\u0438\u0442\u0435\u0442\u043d\u043e\u0433\u043e (authoritative) DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 PowerDNS Authoritative Server 4.3.1, 4.2.3 \u0438 4.1.14, \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, \u0434\u0432\u0435 \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u043c\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u0433\u043e. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 CVE-2020-24696, CVE-2020-24697 \u0438 CVE-2020-24698 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0442 \u043a\u043e\u0434 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u043e\u0431\u043c\u0435\u043d\u0430 \u043a\u043b\u044e\u0447\u0430\u043c\u0438 GSS-TSIG. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u0438 \u0441\u0431\u043e\u0440\u043a\u0435 PowerDNS c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 GSS-TSIG (&#171;&#8212;enable-experimental-gss-tsig&#187;, \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f) [&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-95506","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0430\u0432\u0442\u043e\u0440\u0438\u0442\u0435\u0442\u043d\u043e\u0433\u043e (authoritative) DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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