{"id":170830,"date":"2026-05-16T18:24:39","date_gmt":"2026-05-16T16:24:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/model-ugroz-i-osobennosti-oczenki-uyazvimostej-v-yadre-linux"},"modified":"2026-05-16T18:24:39","modified_gmt":"2026-05-16T16:24:39","slug":"model-ugroz-i-osobennosti-oczenki-uyazvimostej-v-yadre-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/model-ugroz-i-osobennosti-oczenki-uyazvimostej-v-yadre-linux","title":{"rendered":"Model hrozeb a specifika hodnocen\u00ed zranitelnost\u00ed v j\u00e1d\u0159e Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Linus Torvalds za\u0159adil do j\u00e1dra dokument reguluj\u00edc\u00ed proces zpracov\u00e1n\u00ed chyb v oblasti bezpe\u010dnosti, definuj\u00edc\u00ed model hrozeb, vysv\u011btluj\u00edc\u00ed, jak\u00e9 chyby v j\u00e1d\u0159e jsou pova\u017eov\u00e1ny za zranitelnosti, a pojedn\u00e1vaj\u00edc\u00ed o akc\u00edch s chybami odhalen\u00fdmi pomoc\u00ed AI. Dokument byl p\u0159ipraven Willem Tarreau, autorem HAProxy a dlouholet\u00fdm v\u00fdvoj\u00e1\u0159em j\u00e1dra Linux, kter\u00fd m\u011bl na starosti \u00fadr\u017ebu n\u011bkolika stabiln\u00edch v\u011btv\u00ed j\u00e1dra. Jako z\u00e1klad byly pou\u017eity dohody dosa\u017een\u00e9 v pr\u016fb\u011bhu diskuse o ned\u00e1vno odhalen\u00fdch kritick\u00fdch zranitelnostech v j\u00e1d\u0159e (1, 2, 3, 4), kter\u00e9 byly zve\u0159ejn\u011bny p\u0159ed vyd\u00e1n\u00edm oprav a pro kter\u00e9 se d\u00edky AI poda\u0159ilo ihned vytvo\u0159it funk\u010dn\u00ed exploit.      <\/p>\n<p>Hlavn\u00ed mno\u017estv\u00ed chyb spojen\u00fdch s bezpe\u010dnost\u00ed by m\u011blo b\u00fdt zpracov\u00e1v\u00e1no ve\u0159ejn\u011b, aby byla p\u0159il\u00e1k\u00e1na maxim\u00e1ln\u011b \u0161irok\u00e1 ve\u0159ejnost a nalezen\u00ed optim\u00e1ln\u00edho \u0159e\u0161en\u00ed. Do samostatn\u00e9ho soukrom\u00e9ho seznamu rozes\u00edlky se navrhuje zas\u00edlat pouze urgentn\u00ed zpr\u00e1vy o zranitelnostech, kter\u00e9 jsou snadno zneu\u017eiteln\u00e9, p\u0159edstavuj\u00ed hrozbu pro mnoho u\u017eivatel\u016f a umo\u017e\u0148uj\u00ed z\u00edsk\u00e1n\u00ed roz\u0161\u00ed\u0159en\u00fdch privilegi\u00ed nebo schopnost\u00ed.     <\/p>\n<p>Zranitelnosti identifikovan\u00e9 pomoc\u00ed AI asistent\u016f by m\u011bly b\u00fdt v\u017edy projedn\u00e1v\u00e1ny ve\u0159ejn\u011b, proto\u017ee podobn\u00e9 probl\u00e9my jsou \u010dasto objevov\u00e1ny sou\u010dasn\u011b n\u011bkolika v\u00fdzkumn\u00edky. P\u0159i tom se v zpr\u00e1v\u011b nemus\u00ed odhalovat exploit - sta\u010d\u00ed zm\u00ednit, \u017ee je k dispozici, a p\u0159edat ho soukrom\u011b na z\u00e1klad\u011b \u017e\u00e1dosti odpov\u011bdn\u00e9ho.    <\/p>\n<p>Samostatn\u011b jsou pops\u00e1na pravidla pro p\u0159ed\u00e1v\u00e1n\u00ed report\u016f vytvo\u0159en\u00fdch pomoc\u00ed AI asistent\u016f. Takov\u00fdch report\u016f je pos\u00edl\u00e1no velmi mnoho a d\u00edky nim se \u010das od \u010dasu poda\u0159\u00ed odhalit chyby v \u0161patn\u011b recenzovan\u00fdch \u010d\u00e1stech k\u00f3du, ale spr\u00e1vci je \u010dasto ignoruj\u00ed kv\u016fli n\u00edzk\u00e9 kvalit\u011b a nejasnostem. Hlavn\u00ed po\u017eadavky na reporty, kter\u00e9 byly vytvo\u0159eny s pomoc\u00ed AI:   <\/p>\n<ul>\n<li class=\"l\"> Stru\u010dnost, bez zbyte\u010dn\u00fdch informac\u00ed a s uveden\u00edm podstaty a d\u016fle\u017eit\u00fdch detail\u016f na za\u010d\u00e1tku.\n<li class=\"l\"> Pouze hol\u00fd text bez Markdown tag\u016f a dekorac\u00ed.\n<li class=\"l\"> Porozum\u011bn\u00ed modelu hrozeb a uveden\u00ed ov\u011b\u0159en\u00fdch fakt\u016f (nap\u0159. \"chyba umo\u017e\u0148uje jak\u00e9mukoliv u\u017eivateli z\u00edskat CAP_NET_ADMIN\"), a nikoli teoretick\u00fdch spekulac\u00ed a \u00favah o d\u016fsledc\u00edch zranitelnosti.\n<li class=\"l\"> P\u0159ed odesl\u00e1n\u00edm zpr\u00e1vy je nutn\u00e9 d\u016fkladn\u011b otestovat funk\u010dnost exploit\u016f generovan\u00fdch pomoc\u00ed AI a zajistit mo\u017enost reprodukovat probl\u00e9m.\n<li class=\"l\"> Vyu\u017eit\u00ed AI pro v\u00fdvoj a testov\u00e1n\u00ed opravy zji\u0161t\u011bn\u00e9ho probl\u00e9mu.  <\/ul>\n<p>Podle statistik spr\u00e1vce v\u011bt\u0161ina zpr\u00e1v o chyb\u00e1ch zas\u00edlan\u00fdch jako opravy zranitelnost\u00ed vlastn\u011b nebyla, a m\u011bly by b\u00fdt zpracov\u00e1ny b\u011b\u017en\u00fdm zp\u016fsobem jako obvykl\u00e9 chyby. Pro rozli\u0161en\u00ed mezi zranitelnostmi a b\u011b\u017en\u00fdmi chybami byla navr\u017eena model hrozeb j\u00e1dra Linux. Mezi mo\u017enosti a z\u00e1ruky, jejich\u017e poru\u0161en\u00ed m\u016f\u017ee b\u00fdt pova\u017eov\u00e1no za zranitelnost, pat\u0159\u00ed:  <\/p>\n<ul>\n<li class=\"l\"> Izolace na \u00farovni u\u017eivatel\u016f: p\u0159\u00edstup k soubor\u016fm pouze pro vlastn\u00edka, pam\u011b\u0165 procesu nen\u00ed dostupn\u00e1 jin\u00fdm u\u017eivatel\u016fm, ptrace je zak\u00e1z\u00e1n pro ciz\u00ed procesy, izolace IPC a s\u00ed\u0165ov\u00e9 komunikace.\n<li class=\"l\"> Ochrana zalo\u017een\u00e1 na capabilities: bez CAP_SYS_ADMIN nen\u00ed mo\u017en\u00e9 m\u011bnit konfiguraci j\u00e1dra, pam\u011b\u0165 nebo stav syst\u00e9mu, bez CAP_NET_ADMIN nen\u00ed mo\u017en\u00e9 m\u011bnit s\u00ed\u0165ov\u00e1 nastaven\u00ed nebo zachyt\u00e1vat provoz, bez CAP_SYS_PTRACE nen\u00ed mo\u017en\u00e9 sledovat procesy jin\u00fdch u\u017eivatel\u016f.\n<li class=\"l\"> Prostor jmen u\u017eivatelsk\u00fdch identifik\u00e1tor\u016f (CONFIG_USER_NS) umo\u017e\u0148uje nep\u0159ihla\u0161ovan\u00fdm u\u017eivatel\u016fm vytv\u00e1\u0159et sv\u00e9 izolovan\u00e9 prost\u0159ed\u00ed, z nich\u017e nelze ovlivnit glob\u00e1ln\u00ed prostor jmen, nap\u0159\u00edklad m\u011bnit \u010das, na\u010d\u00edtat moduly a montovat blokov\u00e1 za\u0159\u00edzen\u00ed.\n<li class=\"l\"> Ladic\u00ed rozhran\u00ed (\/proc\/kmsg, perf, debugfs), skrze kter\u00e1 lze z\u00edskat citliv\u00e9 informace, jsou dostupn\u00e1 pouze po v\u00fdslovn\u00e9m ud\u011blen\u00ed p\u0159\u00edstupu administr\u00e1torem.    <\/ul>\n<p>Schopnosti, kter\u00e9 nejsou pova\u017eov\u00e1ny za zranitelnosti:  <\/p>\n<ul>\n<li class=\"l\"> Pou\u017eit\u00ed zastaral\u00fdch v\u011btv\u00ed j\u00e1dra.\n<li class=\"l\"> Sestaven\u00ed se zapnut\u00edm voleb pro v\u00fdvoj\u00e1\u0159e nebo sni\u017euj\u00edc\u00edch bezpe\u010dnost (nap\u0159. CONFIG_NOMMU).\n<li class=\"l\"> Nastaven\u00ed nebezpe\u010dn\u00fdch nastaven\u00ed sysctl, voleb p\u0159\u00edkazov\u00e9ho \u0159\u00e1dku, p\u0159\u00edstupov\u00fdch pr\u00e1v v FS, capabilities nebo otev\u0159en\u00ed p\u0159\u00edstupu k privilegovan\u00fdm rozhran\u00edm nep\u0159ihla\u0161ovan\u00fdm u\u017eivatel\u016fm (nap\u0159. z\u00e1pis do procfs a debugfs).\n<li class=\"l\"> Probl\u00e9my ve funkc\u00edch ur\u010den\u00fdch pouze pro v\u00fdvoj a lad\u011bn\u00ed j\u00e1dra, jako jsou LOCKDEP, KASAN a FAULT_INJECTION, kter\u00e9 nejsou ur\u010deny k za\u0159azen\u00ed do pracovn\u00edch konfigurac\u00ed.\n<li class=\"l\"> Probl\u00e9my v ovlada\u010d\u00edch, modulech a podsyst\u00e9mech nach\u00e1zej\u00edc\u00edch se v sekci STAGING nebo ozna\u010den\u00fdch jako experiment\u00e1ln\u00ed, nebezpe\u010dn\u00e9 nebo nefunk\u010dn\u00ed.\n<li class=\"l\"> Pou\u017e\u00edv\u00e1n\u00ed t\u0159et\u00edch stran modul\u016f j\u00e1dra nebo neofici\u00e1ln\u00edch fork\u016f j\u00e1dra.\n<li class=\"l\"> Po\u017eadavek na nadbyte\u010dn\u00e1 opr\u00e1vn\u011bn\u00ed, jako je nutnost vykon\u00e1vat akce s pr\u00e1vy root nebo od u\u017eivatele disponuj\u00edc\u00edho pr\u00e1vy CAP_SYS_ADMIN, CAP_NET_ADMIN, CAP_SYS_RAWIO a CAP_SYS_MODULE.\n<li class=\"l\"> Teoretick\u00e9 \u00fatoky vy\u017eaduj\u00edc\u00ed laboratorn\u00ed podm\u00ednky, miliardy pokus\u016f, emulaci nebo modifikaci hardwaru, nesoum\u011brn\u00e9 n\u00e1klady a nerealistick\u00e9 konfigurace (nap\u0159. syst\u00e9my se stovkami tis\u00edc j\u00e1drov\u00fdch CPU).\n<li class=\"l\"> Obch\u00e1zen\u00ed mechanism\u016f ochrany (nap\u0159. ASLR) bez demonstrace exploit. Absence kontrol argument\u016f a n\u00e1vratov\u00fdch chybov\u00fdch k\u00f3d\u016f, kter\u00e9 nemaj\u00ed jasn\u00e9 d\u016fsledky.\n<li class=\"l\"> N\u00e1hodn\u00e9 \u00faniky informac\u00ed, kter\u00e9 nejsou pod kontrolou \u00fato\u010dn\u00edk\u016f, jako zbytkov\u00e1 data v chybov\u00fdch zpr\u00e1v\u00e1ch a \u00faniky adres\/pointers na pam\u011b\u0165 j\u00e1dra bez p\u0159\u00edm\u00e9 mo\u017enosti zneu\u017eit\u00ed.\n<li class=\"l\"> Chyby p\u0159i montov\u00e1n\u00ed po\u0161kozen\u00fdch obraz\u016f disk\u016f, pokud nen\u00ed ovlada\u010d deklarov\u00e1n jako vhodn\u00fd pro pou\u017eit\u00ed s ned\u016fv\u011bryhodn\u00fdmi m\u00e9di\u00ed. Probl\u00e9my s obrazy disk\u016f, kter\u00e9 lze identifikovat a vy\u0159e\u0161it pomoc\u00ed spu\u0161t\u011bn\u00ed utility fsck.\n<li class=\"l\"> \u00datoky vy\u017eaduj\u00edc\u00ed fyzick\u00fd p\u0159\u00edstup k za\u0159\u00edzen\u00ed, modifikaci hardwaru nebo p\u0159ipojen\u00ed hardwarov\u00fdch za\u0159\u00edzen\u00ed, jako jsou desky pro \u00fatok na DMA a logick\u00e9 analyz\u00e1tory, pokud nen\u00ed syst\u00e9m speci\u00e1ln\u011b nakonfigurov\u00e1n k ochran\u011b p\u0159ed takov\u00fdmi \u00fatoky (IOMMU).\n<li class=\"l\"> Regrese s funk\u010dnost\u00ed a v\u00fdkonem, kter\u00e9 se daj\u00ed odstranit \u00fapravou opr\u00e1vn\u011bn\u00ed a limit\u016f.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65461\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041b\u0438\u043d\u0443\u0441 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\u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0438 \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u044e\u0449\u0438\u0439 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u043c\u0438 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 AI. \u0414\u043e\u043a\u0443\u043c\u0435\u043d\u0442 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0412\u0438\u043b\u043b\u0438 \u0422\u0430\u0440\u0440\u043e (Willy Tarreau), \u0430\u0432\u0442\u043e\u0440\u043e\u043c HAProxy \u0438 \u0434\u0430\u0432\u043d\u0438\u043c \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u043c \u044f\u0434\u0440\u0430 Linux, \u043e\u0442\u0432\u0435\u0447\u0430\u0432\u0448\u0438\u043c \u0437\u0430 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u0435 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0445 \u0432\u0435\u0442\u043e\u043a \u044f\u0434\u0440\u0430. \u0412 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-170830","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=\"\u041b\u0438\u043d\u0443\u0441 \u0422\u043e\u0440\u0432\u0430\u043b\u044c\u0434\u0441 \u043f\u0440\u0438\u043d\u044f\u043b \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442, \u0440\u0435\u0433\u043b\u0430\u043c\u0435\u043d\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 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