{"id":36370,"date":"2019-10-31T22:11:17","date_gmt":"2019-10-31T19:11:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-modulya-lkrg-0-7-dlya-zashhity-ot-ekspluatatsii-uyazvimostej-v-yadre-linux\/"},"modified":"2019-10-31T22:11:17","modified_gmt":"2019-10-31T19:11:17","slug":"vypusk-modulya-lkrg-0-7-dlya-zashhity-ot-ekspluatatsii-uyazvimostej-v-yadre-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-modulya-lkrg-0-7-dlya-zashhity-ot-ekspluatatsii-uyazvimostej-v-yadre-linux","title":{"rendered":"Megjelent a LKRG 0.7 modul a Linux kernel s\u00e9r\u00fcl\u00e9kenys\u00e9geinek kihaszn\u00e1l\u00e1s\u00e1nak v\u00e9delm\u00e9re.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Openwall projekt <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@lists.openwall.com\/msg00169.html\">k\u00f6zz\u00e9tett<\/a><\/noindex> a kernelm\u00f3d fejleszt\u00e9se <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lkrg\/\">LKRG 0.7<\/a><\/noindex>  (Linux Kernel Runtime Guard), amely \u00e9szleli az enged\u00e9ly n\u00e9lk\u00fcli m\u00f3dos\u00edt\u00e1sokat a fut\u00f3 kernelben (integrit\u00e1s-ellen\u0151rz\u00e9s) vagy a felhaszn\u00e1l\u00f3i folyamatok jogosults\u00e1gainak megv\u00e1ltoztat\u00e1s\u00e1t (exploitek alkalmaz\u00e1s\u00e1nak meghat\u00e1roz\u00e1sa). A modul alkalmas m\u00e1r ismert exploitek elleni v\u00e9delemre a Linux kernel sz\u00e1m\u00e1ra (p\u00e9ld\u00e1ul olyan helyzetekben, amikor neh\u00e9zkes a kernel friss\u00edt\u00e9se a rendszerben), valamint az eddig ismeretlen sebezhet\u0151s\u00e9gek exploiteival szembeni v\u00e9delemre. Az LKRG k\u00fcl\u00f6nlegess\u00e9geir\u0151l a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47989\">projekt els\u0151 bejelent\u00e9s\u00e9ben<\/a><\/noindex>. <\/p>\n<p>Az \u00faj verzi\u00f3ban tal\u00e1lhat\u00f3 v\u00e1ltoz\u00e1sok:<\/p>\n<ul>\n<li class=\"l\"> A k\u00f3d refaktor\u00e1l\u00e1sa megt\u00f6rt\u00e9nt a k\u00fcl\u00f6nb\u00f6z\u0151 CPU architekt\u00far\u00e1k t\u00e1mogat\u00e1s\u00e1nak biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben. Kezdeti t\u00e1mogat\u00e1s ker\u00fclt hozz\u00e1ad\u00e1sra az ARM64 architekt\u00far\u00e1hoz;\n<li class=\"l\"> Biztos\u00edtva lett a kompatibilit\u00e1s a Linux 5.1 \u00e9s 5.2 kernellel, valamint azokkal a kernellel, amelyeket a CONFIG_DYNAMIC_DEBUG opci\u00f3 be\u00e1ll\u00edt\u00e1sa n\u00e9lk\u00fcl ford\u00edtottak;<br \/>\nCONFIG_ACPI \u00e9s CONFIG_STACKTRACE, valamint a CONFIG_STATIC_USERMODEHELPER opci\u00f3val ford\u00edtott kernellel. K\u00eds\u00e9rleti t\u00e1mogat\u00e1s ker\u00fclt hozz\u00e1ad\u00e1sra a grsecurity projekt kerneljeihez;<\/p>\n<li class=\"l\"> Jelent\u0151sen megv\u00e1ltozott az inicializ\u00e1l\u00e1s logik\u00e1ja;\n<li class=\"l\"> Az integrit\u00e1s-ellen\u0151rz\u0151 rendszerben \u00fajra enged\u00e9lyez\u00e9sre ker\u00fclt az \u00f6nhashing (self-hashing) \u00e9s megsz\u00fcntet\u00e9sre ker\u00fclt a versenyhelyzet a mintav\u00e9teli motor (*_JUMP_LABEL) eset\u00e9ben, ami k\u00f6lcs\u00f6n\u00f6s blokkol\u00e1st eredm\u00e9nyezett a m\u00e1s modulok bet\u00f6lt\u00e9s\u00e9vel vagy elt\u00e1vol\u00edt\u00e1s\u00e1val kapcsolatos esem\u00e9nyek sor\u00e1n;\n<li class=\"l\"> Az exploitek alkalmaz\u00e1s\u00e1nak meghat\u00e1roz\u00e1s\u00e1ra szolg\u00e1l\u00f3 k\u00f3dba \u00faj sysctl lkrg.smep_panic (alap\u00e9rtelmez\u00e9s szerint enged\u00e9lyezve) \u00e9s lkrg.umh_lock (alap\u00e9rtelmez\u00e9s szerint letiltva) ker\u00fclt hozz\u00e1ad\u00e1sra, tov\u00e1bbi ellen\u0151rz\u00e9sek ker\u00fcltek bevezet\u00e9sre az SMEP\/WP bitre, a rendszer \u00faj feladatainak nyomon k\u00f6vet\u00e9s\u00e9nek logik\u00e1ja megv\u00e1ltozott, a feladatok er\u0151forr\u00e1saival val\u00f3 bels\u0151 szinkroniz\u00e1l\u00e1s logik\u00e1ja \u00fajragondol\u00e1sra ker\u00fclt, OverlayFS t\u00e1mogat\u00e1s ker\u00fclt hozz\u00e1ad\u00e1sra, az Ubuntu Apport feh\u00e9rlist\u00e1ra ker\u00fclt.\n<\/ul>\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=51139\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u043e\u0435\u043a\u0442 Openwall \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0432\u044b\u043f\u0443\u0441\u043a \u043c\u043e\u0434\u0443\u043b\u044f \u044f\u0434\u0440\u0430 LKRG 0.7 (Linux Kernel Runtime Guard), \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0435 \u043d\u0435\u0441\u0430\u043d\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0432 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0435\u0435 \u044f\u0434\u0440\u043e (\u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438) \u0438\u043b\u0438 \u043f\u043e\u043f\u044b\u0442\u043e\u043a \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u043f\u043e\u043b\u043d\u043e\u043c\u043e\u0447\u0438\u0439 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 (\u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u043e\u0432). \u041c\u043e\u0434\u0443\u043b\u044c \u043f\u043e\u0434\u0445\u043e\u0434\u0438\u0442 \u043a\u0430\u043a \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0437\u0430\u0449\u0438\u0442\u044b \u043e\u0442 \u0443\u0436\u0435 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u0445 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u043e\u0432 \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u044f\u0445 \u043a\u043e\u0433\u0434\u0430 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430\u0442\u0438\u0447\u043d\u043e \u043e\u0431\u043d\u043e\u0432\u0438\u0442\u044c \u044f\u0434\u0440\u043e), \u0442\u0430\u043a \u0438 [&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-36370","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u043e\u0435\u043a\u0442 Openwall \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0432\u044b\u043f\u0443\u0441\u043a \u043c\u043e\u0434\u0443\u043b\u044f \u044f\u0434\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\" href=\"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-modulya-lkrg-0-7-dlya-zashhity-ot-ekspluatatsii-uyazvimostej-v-yadre-linux\" 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