{"id":102960,"date":"2022-01-13T21:36:44","date_gmt":"2022-01-13T19:36:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d0%b5%d1%89%d1%91-%d0%be%d0%b4%d0%bd%d0%b0-%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d0%bf%d0%be%d0%b4%d1%81%d0%b8%d1%81%d1%82%d0%b5%d0%bc%d0%b5-ebpf-%d0%bf%d0%be%d0%b7"},"modified":"2022-01-13T21:36:44","modified_gmt":"2022-01-13T19:36:44","slug":"%d0%b5%d1%89%d1%91-%d0%be%d0%b4%d0%bd%d0%b0-%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d0%bf%d0%be%d0%b4%d1%81%d0%b8%d1%81%d1%82%d0%b5%d0%bc%d0%b5-ebpf-%d0%bf%d0%be%d0%b7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/%d0%b5%d1%89%d1%91-%d0%be%d0%b4%d0%bd%d0%b0-%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d0%bf%d0%be%d0%b4%d1%81%d0%b8%d1%81%d1%82%d0%b5%d0%bc%d0%b5-ebpf-%d0%bf%d0%be%d0%b7","title":{"rendered":"Eine weitere Schwachstelle im eBPF-Subsystem erm\u00f6glicht eine Erh\u00f6hung der Privilegien.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Im eBPF-Subsystem wurde eine weitere Schwachstelle entdeckt (CVE liegt nicht vor), \u00e4hnlich wie das gestrige Problem, das es einem lokalen, nicht privilegierten Benutzer erm\u00f6glicht, Code auf Kernel-Ebene von Linux auszuf\u00fchren. Das Problem tritt seit dem Linux-Kernel 5.8 auf und ist bisher unbehoben. Ein funktionierender Exploit wird f\u00fcr den 18. Januar angek\u00fcndigt. <\/p>\n

Eine neue Schwachstelle resultiert aus der unzureichenden \u00dcberpr\u00fcfung von eBPF-Programmen, die zur Ausf\u00fchrung \u00fcbergeben werden. Insbesondere schr\u00e4nkte der eBPF-Verifikator bestimmte Arten von Zeigern *_OR_NULL nicht angemessen ein, was es erm\u00f6glichte, Zeiger in eBPF-Programmen zu manipulieren und seine Berechtigungen zu erh\u00f6hen. Um die Ausnutzung dieser Schwachstelle zu verhindern, wird empfohlen, die Ausf\u00fchrung von BPF-Programmen f\u00fcr unprivilegierte Benutzer mit dem Befehl \u201esysctl -w kernel.unprivileged_bpf_disabled=1\u201c zu verbieten.
\n
Quelle: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 eBPF \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442), \u043a\u0430\u043a \u0438 \u0432\u0447\u0435\u0440\u0430\u0448\u043d\u044f\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u044f\u0434\u0440\u0430 Linux. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u044f\u0434\u0440\u0430 Linux 5.8 \u0438 \u043f\u043e\u043a\u0430 \u043e\u0441\u0442\u0430\u0451\u0442\u0441\u044f \u043d\u0435\u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0439. \u0420\u0430\u0431\u043e\u0447\u0438\u0439 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442 \u043e\u0431\u0435\u0449\u0430\u044e\u0442 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u0442\u044c 18 \u044f\u043d\u0432\u0430\u0440\u044f. \u041d\u043e\u0432\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0445 \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f eBPF-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c. \u0412 \u0447\u0430\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u0432\u0435\u0440\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 eBPF \u0434\u043e\u043b\u0436\u043d\u044b\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c […]<\/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-102960","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Eine weitere Schwachstelle im eBPF-Subsystem erm\u00f6glicht das Erh\u00f6hen von Privilegien | ProHoster","description":"Im eBPF-Subsystem wurde eine weitere Schwachstelle entdeckt (CVE liegt nicht vor), \u00e4hnlich dem gestrigen Problem, das es einem lokalen unprivilegierten Benutzer erm\u00f6glicht, Code auf Kernel-Ebene von Linux auszuf\u00fchren. Das Problem tritt ab Kernel-Version 5.8 auf und ist bisher nicht behoben. Ein funktionierender Exploit soll am 18. Januar ver\u00f6ffentlicht werden. Diese neue Schwachstelle entsteht durch unzureichende \u00dcberpr\u00fcfungen der \u00fcbergebenen eBPF-Programme zur Ausf\u00fchrung. Insbesondere der eBPF-Validator funktioniert dabei nicht ordnungsgem\u00e4\u00df.","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/%d0%b5%d1%89%d1%91-%d0%be%d0%b4%d0%bd%d0%b0-%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d0%bf%d0%be%d0%b4%d1%81%d0%b8%d1%81%d1%82%d0%b5%d0%bc%d0%b5-ebpf-%d0%bf%d0%be%d0%b7","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\u0415\u0449\u0451 \u043e\u0434\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 eBPF, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 | ProHoster","og:description":"\u0412 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 eBPF \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442), \u043a\u0430\u043a \u0438 \u0432\u0447\u0435\u0440\u0430\u0448\u043d\u044f\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 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\u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0445 \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f eBPF-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c. \u0412 \u0447\u0430\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u0432\u0435\u0440\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 eBPF \u0434\u043e\u043b\u0436\u043d\u044b\u043c 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