{"id":87102,"date":"2020-07-03T19:42:01","date_gmt":"2020-07-03T17:42:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-ubuntu-20-10-budet-ogranichen-dostup-k-dmesg"},"modified":"2020-07-03T19:42:01","modified_gmt":"2020-07-03T17:42:01","slug":"v-ubuntu-20-10-budet-ogranichen-dostup-k-dmesg","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/v-ubuntu-20-10-budet-ogranichen-dostup-k-dmesg","title":{"rendered":"In Ubuntu 20.10 wird der Zugriff auf dmesg eingeschr\u00e4nkt sein.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Die Entwickler von Ubuntu <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.ubuntu.com\/archives\/ubuntu-devel\/2020-July\/041079.html\">genehmigt<\/a><\/noindex> Zugriffsbeschr\u00e4nkung auf das Dienstprogramm \/usr\/bin\/dmesg nur f\u00fcr Benutzer, die der Gruppe &#171;adm&#187; angeh\u00f6ren. Derzeit haben unprivilegierte Benutzer von Ubuntu keinen Zugang zu \/var\/log\/kern.log, \/var\/log\/syslog und Systemereignissen im journalctl, k\u00f6nnen jedoch die Kernelereignisprotokolle \u00fcber dmesg einsehen.<\/p>\n<p>Als Grund wird genannt, dass die Ausgabe von dmesg Informationen enth\u00e4lt, die von Angreifern verwendet werden k\u00f6nnen, um das Erstellen von Exploits zur Erh\u00f6hung der Privilegien zu erleichtern. Beispielsweise werden bei einem Absturz in dmesg ein Stack-Dump angezeigt und es besteht die M\u00f6glichkeit, Adressen von Strukturen im Kernel zu bestimmen, was den Mechanismus KASLR umgehen kann. Ein Angreifer kann dmesg als Feedback nutzen, um den Exploit schrittweise zu optimieren, indem er die oops-Meldungen im Protokoll nach gescheiterten Angriffen beobachtet.<\/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=53280\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 Ubuntu \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043b\u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0443\u0442\u0438\u043b\u0438\u0442\u0435 \/usr\/bin\/dmesg \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u0432\u0445\u043e\u0434\u044f\u0449\u0438\u0445 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wird der Zugriff auf dmesg eingeschr\u00e4nkt | ProHoster","description":"Die Entwickler von Ubuntu haben den Zugriff auf das Dienstprogramm \/usr\/bin\/dmesg nur f\u00fcr Benutzer, die der Gruppe \"adm\" angeh\u00f6ren, eingeschr\u00e4nkt. Derzeit haben nicht privilegierte Benutzer von Ubuntu keinen Zugang zu \/var\/log\/kern.log, \/var\/log\/syslog und systemweiten Ereignissen in journalctl, k\u00f6nnen jedoch das Kernel-Ereignisprotokoll \u00fcber dmesg einsehen. Als Grund wird angegeben, dass die Ausgabe von dmesg Informationen enth\u00e4lt, die von Angreifern verwendet werden k\u00f6nnen, um","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/v-ubuntu-20-10-budet-ogranichen-dostup-k-dmesg","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412 Ubuntu 20.10 \u0431\u0443\u0434\u0435\u0442 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d \u0434\u043e\u0441\u0442\u0443\u043f \u043a dmesg | 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