{"id":105611,"date":"2022-11-17T15:36:54","date_gmt":"2022-11-17T13:36:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera"},"modified":"2022-11-17T15:36:54","modified_gmt":"2022-11-17T13:36:54","slug":"uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera","title":{"rendered":"Sicherheitsanf\u00e4lligkeit in Samba und MIT\/Heimdal Kerberos, die zu einem Puffer\u00fcberlauf f\u00fchrt","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Korrekturversionen des Samba-Pakets 4.17.3, 4.16.7 und 4.15.12 wurden ver\u00f6ffentlicht, um die Sicherheitsanf\u00e4lligkeit (CVE-2022-42898) in den Kerberos-Bibliotheken zu beheben, die zu einem ganzzahligen \u00dcberlauf und zum Schreiben von Daten au\u00dferhalb des zugewiesenen Puffers f\u00fchrt, wenn PAC (Privileged Attribute Certificate)-Parameter verarbeitet werden, die von einem authentifizierten Benutzer gesendet werden. Das Verfolgen der Ver\u00f6ffentlichung von Paketupdates in den Distributionen ist auf den Seiten zu sehen: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD.       <\/p>\n<p>Neben Samba tritt das Problem auch in Paketen mit MIT Kerberos und Heimdal Kerberos auf. Im Sicherheitsbericht des Samba-Projekts wird die Bedrohung nicht detailliert beschrieben, aber im Bericht von MIT Kerberos wird angegeben, dass die Sicherheitsanf\u00e4lligkeit zu einer remote Codeausf\u00fchrung f\u00fchren kann. Die Ausnutzung der Sicherheitsanf\u00e4lligkeit ist nur auf 32-Bit-Systemen m\u00f6glich.     <\/p>\n<p>Das Problem betrifft Konfigurationen mit KDC (Key Distribution Center) oder kadmind. In Konfigurationen ohne Active Directory tritt die Sicherheitsanf\u00e4lligkeit auch auf Dateiservern auf <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/de\/server\/dts-gdansk\/\"   title=\"Servern\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4547\">Servern<\/a> Samba, die Kerberos verwenden. Das Problem wird durch einen Fehler in der Funktion krb5_parse_pac() verursacht, wodurch die Gr\u00f6\u00dfe des verwendeten Puffers beim Analysieren der PAC-Felder falsch berechnet wurde. Auf 32-Bit-Systemen konnte dieser Fehler bei der Verarbeitung speziell gestalteter PAC dazu f\u00fchren, dass ein vom Angreifer gesendeter 16-Byte-Block au\u00dferhalb des zugewiesenen Puffers platziert wurde.<br \/>\n<br \/>Quelle: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58135\">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 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.17.3, 4.16.7 \u0438 4.15.12 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2022-42898) \u0432 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u0445 Kerberos, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u043c\u0443 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0438 \u0437\u0430\u043f\u0438\u0441\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432 PAC (Privileged Attribute Certificate), \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c. \u041f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u044e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0432 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 \u043c\u043e\u0436\u043d\u043e \u043f\u0440\u043e\u0441\u043b\u0435\u0434\u0438\u0442\u044c \u043d\u0430 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430\u0445: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD. \u041a\u0440\u043e\u043c\u0435 Samba [&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-105611","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\" 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