{"id":142366,"date":"2025-09-05T11:11:57","date_gmt":"2025-09-05T09:11:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-lkrg-1-0-0-dlya-zashhity-ot-ekspluataczii-uyazvimostej-v-yadre-linux"},"modified":"2026-01-24T17:56:45","modified_gmt":"2026-01-24T15:56:45","slug":"vypusk-lkrg-1-0-0-dlya-zashhity-ot-ekspluataczii-uyazvimostej-v-yadre-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-lkrg-1-0-0-dlya-zashhity-ot-ekspluataczii-uyazvimostej-v-yadre-linux","title":{"rendered":"Vyd\u00e1n\u00ed LKRG 1.0.0 pro ochranu p\u0159ed zneu\u017eit\u00edm zranitelnost\u00ed v j\u00e1d\u0159e Linuxu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Projekt Openwall zve\u0159ejnil modul j\u00e1dra LKRG 1.0.0 (Linux Kernel Runtime Guard), ur\u010den\u00fd k ov\u011b\u0159ov\u00e1n\u00ed integrity struktur j\u00e1dra a odhalov\u00e1n\u00ed pokus\u016f o zneu\u017eit\u00ed zranitelnost\u00ed v j\u00e1d\u0159e. Bylo uvedeno, \u017ee p\u0159id\u011blen\u00ed \u010d\u00edsla verze 1.0.0 znamenalo dosa\u017een\u00ed zral\u00e9ho stavu projektu. K\u00f3d projektu je distribuov\u00e1n pod licenc\u00ed GPLv2.       <\/p>\n<p>Modul je vhodn\u00fd jak pro <a href=\"https:\/\/prohoster.info\/cs\/zhashchita-ot-ddos\/\"  data-wpil-monitor-id=\"5\">obranu proti \u00fatok\u016fm<\/a>, manipuluj\u00edc\u00ed ji\u017e zn\u00e1m\u00fdmi zranitelnostmi v j\u00e1d\u0159e Linux, tak pro odol\u00e1v\u00e1n\u00ed exploit\u016fm, kter\u00e9 vyu\u017e\u00edvaj\u00ed je\u0161t\u011b nezn\u00e1m\u00e9 zranitelnosti, pokud se na n\u011b nevztahuj\u00ed speci\u00e1ln\u00ed opat\u0159en\u00ed k obran\u011b proti LKRG. Ochrana se zakl\u00e1d\u00e1 na odhalen\u00ed neopr\u00e1vn\u011bn\u00e9ho zasahov\u00e1n\u00ed do b\u011b\u017e\u00edc\u00edho j\u00e1dra (ov\u011b\u0159en\u00ed integrity) a sledov\u00e1n\u00ed zm\u011bn opr\u00e1vn\u011bn\u00ed u\u017eivatelsk\u00fdch proces\u016f (ur\u010den\u00ed \u00fasp\u011b\u0161nosti exploit\u016f).     <\/p>\n<p>Kontrola integrity se prov\u00e1d\u00ed na z\u00e1klad\u011b porovn\u00e1n\u00ed hash\u016f vypo\u010d\u00edtan\u00fdch pro nejd\u016fle\u017eit\u011bj\u0161\u00ed oblasti pam\u011bti a datov\u00fdch struktur j\u00e1dra, jako jsou IDT (Tabulka popisu p\u0159eru\u0161en\u00ed), MSR, tabulky syst\u00e9mov\u00fdch vol\u00e1n\u00ed, v\u0161echny procedury a funkce, obslu\u017en\u00e9 rutiny p\u0159eru\u0161en\u00ed, seznamy na\u010dten\u00fdch modul\u016f, obsah sekce  modul\u016f a atributy proces\u016f. Procedura kontroly je periodicky aktivov\u00e1na podle \u010dasova\u010de nebo p\u0159i ur\u010dit\u00fdch ud\u00e1lostech v j\u00e1d\u0159e, nap\u0159\u00edklad p\u0159i vykon\u00e1v\u00e1n\u00ed syst\u00e9mov\u00fdch vol\u00e1n\u00ed setuid, setreuid, fork, exit, execve a do_init_module.    <\/p>\n<p>Ur\u010den\u00ed mo\u017en\u00e9ho pou\u017eit\u00ed exploit\u016f a blokov\u00e1n\u00ed \u00fatok\u016f se prov\u00e1d\u00ed ve f\u00e1zi p\u0159ed poskytnut\u00edm p\u0159\u00edstupu j\u00e1drem k prost\u0159edk\u016fm (nap\u0159\u00edklad p\u0159ed otev\u0159en\u00edm souboru), ale po z\u00edsk\u00e1n\u00ed neopr\u00e1vn\u011bn\u00fdch opr\u00e1vn\u011bn\u00ed procesem (nap\u0159\u00edklad zm\u011bnou UID). P\u0159i odhalen\u00ed neopr\u00e1vn\u011bn\u00e9ho chov\u00e1n\u00ed proces\u016f se prov\u00e1d\u00ed jejich nucen\u00e9 ukon\u010den\u00ed, co\u017e sta\u010d\u00ed k blokaci mnoha exploit\u016f. N\u00e1klady na provoz modulu jsou odhadov\u00e1ny na 2-2.5%.      <\/p>\n<p>Podporov\u00e1na je funk\u010dnost na syst\u00e9mech s architekturami x86-64, AArch64 (ARM64), ARM32 a x86. Funk\u010dnost LKRG 1.0.0 byla testov\u00e1na s j\u00e1dry r\u016fzn\u00fdch distribuc\u00ed, po\u010d\u00ednaje j\u00e1drem 3.10 ze RHEL\/CentOS 7 a kon\u010de 6.17-rc4 z repozit\u00e1\u0159e, ve kter\u00e9m se p\u0159ipravuje vyd\u00e1n\u00ed Fedora 44. Bal\u00ed\u010dky jsou k dispozici pro distribuce ALT Linux, Arch Linux, Astra Linux, Gentoo, Guix, NixOS, Rocky Linux, Whonix, Yocto a OpenBMC. Sestaven\u00e9 bal\u00ed\u010dky pro Rocky Linux lze pou\u017e\u00edt v RHEL 8\/9 a odvozen\u00fdch distribuc\u00edch, jako je AlmaLinux 8\/9, zat\u00edmco bal\u00ed\u010dky pro Whonix v Debianu a Ubuntu.      <\/p>\n<p>Mezi zm\u011bnami v nov\u00e9 verzi:  <\/p>\n<ul>\n<li class=\"l\"> Zaji\u0161t\u011bna kompatibilita s j\u00e1dry Linux a\u017e do verze 6.17-rc4.\n<li class=\"l\"> P\u0159i pou\u017eit\u00ed s j\u00e1dry od verze 6.13 byl zastaven intercept vzd\u00e1len\u00fdch vol\u00e1n\u00ed override_creds() a revert_creds(), co\u017e omezilo detekci \u00fatok\u016f p\u0159episuj\u00edc\u00edch ukazatel cred. Omezuj\u00edc\u00ed faktory se sna\u017eily kompenzovat p\u0159id\u00e1n\u00edm kontrol p\u0159episov\u00e1n\u00ed ukazatele cred na jin\u00fdch m\u00edstech j\u00e1dra.\n<li class=\"l\"> Bylo zastaveno nadm\u011brn\u00e9 sledov\u00e1n\u00ed p\u0159ihla\u0161ovac\u00edch \u00fadaj\u016f, pro kter\u00e9 se neprov\u00e1d\u011bla kontrola integrity. Zm\u011bna umo\u017enila zkr\u00e1tit k\u00f3dovou z\u00e1kladnu p\u0159ibli\u017en\u011b o 1500 \u0159\u00e1dk\u016f.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora mechanismu, kter\u00fd se objevil v j\u00e1d\u0159e Linux 6.10, pro vytv\u00e1\u0159en\u00ed do\u010dasn\u00fdch soubor\u016f ve FS OverlayFS s pou\u017eit\u00edm volby O_TMPFILE (ovl_tmpfile). Uveden\u00e1 podpora je nezbytn\u00e1 pro prevenci fale\u0161n\u00fdch pozitiv, kter\u00e9 se projevuj\u00ed p\u0159i pou\u017eit\u00ed izolovan\u00fdch kontejner\u016f na syst\u00e9mech s j\u00e1dry 6.10-6.12.\n<li class=\"l\"> Pro syst\u00e9my x86_64 byla p\u0159id\u00e1na podpora technologie Intel CET (Control-flow Enforcement Technology) pro ochranu spustiteln\u00e9ho k\u00f3du pou\u017eit\u00edm instrukc\u00ed IBT (indirect branch tracking) a tak\u00e9 softwarov\u00e9 ochrany kCFI (kernel Control Flow Integrity) pro zablokov\u00e1n\u00ed poru\u0161en\u00ed norm\u00e1ln\u00edho po\u0159ad\u00ed prov\u00e1d\u011bn\u00ed (control flow) v d\u016fsledku pou\u017eit\u00ed exploit\u016f, kter\u00e9 m\u011bn\u00ed ulo\u017een\u00e9 ukazatele na funkce v pam\u011bti.\n<li class=\"l\"> M\u00edsto kretprobes byl pro p\u0159ipojen\u00ed mnoha zpracovatel\u016f pou\u017eit mechanismus kprobes, co\u017e zjednodu\u0161ilo k\u00f3d nastaven\u00ed hook\u016f a umo\u017enilo dos\u00e1hnout lep\u0161\u00ed v\u00fdkonnosti.\n<li class=\"l\"> Bylo p\u0159epracov\u00e1no zach\u00e1zen\u00ed s blokacemi (lock) dat v j\u00e1d\u0159e, specifick\u00fdch pro proces (per-task shadow data). D\u00edky vylou\u010den\u00ed nadbyte\u010dn\u00fdch blokac\u00ed se zv\u00fd\u0161ila v\u00fdkonnost p\u0159\u00edstupu k t\u011bmto dat\u016fm.\n<li class=\"l\"> Byly odstran\u011bny chyby vedouc\u00ed k z\u00e1vodn\u00edm stav\u016fm, probl\u00e9m\u016fm s kontrolou integrity a fale\u0161n\u00fdm pozitiv\u016fm.\n<li class=\"l\"> Zlep\u0161ena podpora sestaven\u00ed s vyu\u017eit\u00edm Clang.  <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63827\">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 \u043c\u043e\u0434\u0443\u043b\u044c \u044f\u0434\u0440\u0430 LKRG 1.0.0 (Linux Kernel Runtime Guard), \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440 \u044f\u0434\u0440\u0430 \u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u043e\u043f\u044b\u0442\u043e\u043a \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u044f\u0434\u0440\u0435. \u041e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d\u0438\u0435 \u043d\u043e\u043c\u0435\u0440\u0430 \u0432\u0435\u0440\u0441\u0438\u0438 1.0.0 \u043e\u0437\u043d\u0430\u043c\u0435\u043d\u043e\u0432\u0430\u043b\u043e \u0434\u043e\u0441\u0442\u0438\u0436\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c \u0437\u0440\u0435\u043b\u043e\u0433\u043e \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2. \u041c\u043e\u0434\u0443\u043b\u044c \u043f\u043e\u0434\u0445\u043e\u0434\u0438\u0442 \u043a\u0430\u043a \u0434\u043b\u044f \u0437\u0430\u0449\u0438\u0442\u044b \u043e\u0442 \u0430\u0442\u0430\u043a, \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u0443\u0436\u0435 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u043c\u0438 \u0443\u0437\u044f\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u043c\u0438 \u0432 \u044f\u0434\u0440\u0435 Linux, [&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-142366","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 \u043c\u043e\u0434\u0443\u043b\u044c \u044f\u0434\u0440\u0430 LKRG 1.0.0 (Linux Kernel Runtime Guard), \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440 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property=\"article:published_time\" content=\"2025-09-05T09:11:57+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-01-24T15:56:45+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Vyd\u00e1n\u00ed LKRG 1.0.0 pro ochranu proti zneu\u017e\u00edv\u00e1n\u00ed zranitelnost\u00ed v j\u00e1d\u0159e Linux | ProHoster","description":"Projekt Openwall zve\u0159ejnil modul j\u00e1dra LKRG 1.0.0 (Linux Kernel Runtime Guard), ur\u010den\u00fd k kontrolov\u00e1n\u00ed integrity struktur j\u00e1dra a detekci pokus\u016f o zneu\u017eit\u00ed zranitelnost\u00ed v 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