{"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\/hu\/blog\/news\/v-ubuntu-20-10-budet-ogranichen-dostup-k-dmesg","title":{"rendered":"Az Ubuntu 20.10-ben korl\u00e1tozni fogj\u00e1k a hozz\u00e1f\u00e9r\u00e9st a dmesg-hez","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Az Ubuntu fejleszt\u0151i <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.ubuntu.com\/archives\/ubuntu-devel\/2020-July\/041079.html\">egyet\u00e9rtenek<\/a><\/noindex> A hozz\u00e1f\u00e9r\u00e9si korl\u00e1toz\u00e1s a \/usr\/bin\/dmesg seg\u00e9dprogramhoz csak az &#171;adm&#187; csoportba tartoz\u00f3 felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra enged\u00e9lyezett. Jelenleg az Ubuntu nem jogosults\u00e1ggal rendelkez\u0151 felhaszn\u00e1l\u00f3i nem f\u00e9rhetnek hozz\u00e1 a \/var\/log\/kern.log, \/var\/log\/syslog \u00e9s a journalctl rendszeresem\u00e9nyeihez, de megtekinthetik a kernel esem\u00e9nynapl\u00f3t a dmesg seg\u00edts\u00e9g\u00e9vel.<\/p>\n<p>Az indokl\u00e1s szerint a dmesg kimenet\u00e9ben olyan inform\u00e1ci\u00f3k tal\u00e1lhat\u00f3k, amelyeket a t\u00e1mad\u00f3k kihaszn\u00e1lhatnak a jogosults\u00e1gemel\u0151 exploitok k\u00e9sz\u00edt\u00e9s\u00e9nek megk\u00f6nny\u00edt\u00e9s\u00e9re. P\u00e9ld\u00e1ul a dmesg-ben hiba eset\u00e9n l\u00e1that\u00f3 a verem dump \u00e9s lehet\u0151s\u00e9g van a Kernel strukt\u00far\u00e1k c\u00edm\u00e9nek meghat\u00e1roz\u00e1s\u00e1ra, amelyek seg\u00edthetnek a KASLR mechanizmus megker\u00fcl\u00e9s\u00e9ben. A t\u00e1mad\u00f3 a dmesg-t visszajelz\u00e9sk\u00e9nt haszn\u00e1lhatja, fokozatosan finom\u00edtva az exploitot, figyelve az oops \u00fczeneteket a napl\u00f3ban a sikertelen t\u00e1mad\u00e1si k\u00eds\u00e9rletek ut\u00e1n.<\/p>\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=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 \u0432 \u0433\u0440\u0443\u043f\u043f\u0443 &#171;adm&#187;. \u0412 \u043d\u0430\u0441\u0442\u043e\u044f\u0449\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 Ubuntu \u043d\u0435 \u0438\u043c\u0435\u044e\u0442 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \/var\/log\/kern.log, \/var\/log\/syslog \u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u043c \u0441\u043e\u0431\u044b\u0442\u0438\u044f\u043c \u0432 journalctl, \u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u043b\u043e\u0433 \u0441\u043e\u0431\u044b\u0442\u0438\u0439 \u044f\u0434\u0440\u0430 \u0447\u0435\u0440\u0435\u0437 dmesg. \u0412 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0440\u0438\u0447\u0438\u043d\u044b \u0443\u043f\u043e\u043c\u0438\u043d\u0430\u0435\u0442\u0441\u044f \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u0432 \u0432\u044b\u0432\u043e\u0434\u0435 dmesg \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u044b \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u043c\u0438 \u0434\u043b\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-87102","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 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