{"id":33686,"date":"2019-10-31T21:54:10","date_gmt":"2019-10-31T18:54:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novaya-uyazvimost-zatragivaet-prakticheski-kazhdyj-chip-intel-proizvedyonnyj-s-2011-goda\/"},"modified":"2019-10-31T21:54:10","modified_gmt":"2019-10-31T18:54:10","slug":"novaya-uyazvimost-zatragivaet-prakticheski-kazhdyj-chip-intel-proizvedyonnyj-s-2011-goda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/novaya-uyazvimost-zatragivaet-prakticheski-kazhdyj-chip-intel-proizvedyonnyj-s-2011-goda","title":{"rendered":"Nov\u00e1 zranitelnost zasahuje prakticky ka\u017ed\u00fd \u010dip Intel vyr\u00e1b\u011bn\u00fd od roku 2011.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Odborn\u00edci na informa\u010dn\u00ed bezpe\u010dnost objevili novou zranitelnost v \u010dipech Intel, kterou lze vyu\u017e\u00edt k kr\u00e1de\u017ei citliv\u00fdch informac\u00ed p\u0159\u00edmo z procesoru. V\u011bdci ji nazvali \u201eZombieLoad\u201c. ZombieLoad \u2013 je \u00fatok typu side-channel zam\u011b\u0159en\u00fd na \u010dipy Intel, kter\u00fd umo\u017e\u0148uje hacker\u016fm efektivn\u011b vyu\u017e\u00edt slabiny v jejich architektu\u0159e k z\u00edsk\u00e1n\u00ed libovoln\u00fdch dat, p\u0159i\u010dem\u017e v\u0161ak neumo\u017e\u0148uje implantaci a vykon\u00e1v\u00e1n\u00ed libovoln\u00e9ho \u0161kodliv\u00e9ho k\u00f3du, tak\u017ee ji nelze pou\u017e\u00edt jako jedin\u00fd n\u00e1stroj pro vniknut\u00ed a hackov\u00e1n\u00ed vzd\u00e1len\u00fdch po\u010d\u00edta\u010d\u016f.<\/p>\n<p><img decoding=\"async\" alt=\"Nov\u00e1 zranitelnost zasahuje prakticky ka\u017ed\u00fd \u010dip Intel vyr\u00e1b\u011bn\u00fd od roku 2011.\" src=\"\/wp-content\/uploads\/2019\/05\/1da259be37db8107eeac1fde735cd09d.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Jak uv\u00e1d\u00ed Intel, ZombieLoad se skl\u00e1d\u00e1 ze \u010dty\u0159 chyb v mikro k\u00f3du jejich \u010dip\u016f, o kter\u00fdch v\u00fdzkumn\u00edci informovali spole\u010dnost p\u0159ed pouh\u00fdm m\u011bs\u00edcem. Zranitelnost se t\u00fdk\u00e1 prakticky v\u0161ech po\u010d\u00edta\u010d\u016f s \u010dipy Intel vydan\u00fdmi od roku 2011. \u010cipy ARM a AMD touto zranitelnost\u00ed nejsou posti\u017eeny.<\/p>\n<p>ZombieLoad p\u0159ipom\u00edn\u00e1 zn\u00e1m\u00e9 Meltdown a Spectre, kter\u00e9 vyu\u017e\u00edvaly chybu v syst\u00e9mu spekulativn\u00edho (p\u0159edb\u011b\u017en\u00e9ho) vykon\u00e1v\u00e1n\u00ed p\u0159\u00edkaz\u016f. Spekulativn\u00ed vykon\u00e1v\u00e1n\u00ed pom\u00e1h\u00e1 procesor\u016fm do ur\u010dit\u00e9 m\u00edry p\u0159edpov\u00eddat, co m\u016f\u017ee b\u00fdt pro aplikaci \u010di opera\u010dn\u00ed syst\u00e9m pot\u0159ebn\u00e9 v bl\u00edzk\u00e9 budoucnosti, co\u017e umo\u017e\u0148uje aplikaci fungovat rychleji a efektivn\u011bji. Procesor vr\u00e1t\u00ed v\u00fdsledky sv\u00fdch p\u0159edpov\u011bd\u00ed, pokud se uk\u00e1\u017eou jako spr\u00e1vn\u00e9, nebo zru\u0161\u00ed v\u00fdsledky vykon\u00e1v\u00e1n\u00ed, pokud byla p\u0159edpov\u011b\u010f chybn\u00e1. Jak Meltdown, tak Spectre vyu\u017e\u00edvaj\u00ed mo\u017enosti zneu\u017eit\u00ed t\u00e9to funkce k z\u00edsk\u00e1n\u00ed p\u0159\u00edm\u00e9ho p\u0159\u00edstupu k informac\u00edm, se kter\u00fdmi procesor operuje.<\/p>\n<p><center><\/center><\/p>\n<p>ZombieLoad se p\u0159ekl\u00e1d\u00e1 jako \u201enahr\u00e1v\u00e1n\u00ed zombie\u201c, co\u017e \u010d\u00e1ste\u010dn\u011b vysv\u011btluje mechanismus zranitelnosti. B\u011bhem \u00fatoku je do procesoru dod\u00e1v\u00e1no takov\u00e9 mno\u017estv\u00ed dat, kter\u00e9 nen\u00ed schopen \u0159\u00e1dn\u011b zpracovat, co\u017e nut\u00ed procesor po\u017e\u00e1dat o pomoc mikrok\u00f3d pro prevenci selh\u00e1n\u00ed. Obvykle aplikace vid\u00ed pouze sv\u00e1 vlastn\u00ed data, ale chyba zp\u016fsoben\u00e1 p\u0159et\u00ed\u017een\u00edm procesoru umo\u017e\u0148uje toto omezen\u00ed obej\u00edt. V\u011bdci uvedli, \u017ee ZombieLoad je schopen z\u00edskat jak\u00e1koli data pou\u017e\u00edvan\u00e1 j\u00e1dry procesoru. Intel uv\u00e1d\u00ed, \u017ee oprava pro mikrok\u00f3d pom\u016f\u017ee vymazat pam\u011b\u0165ov\u00e9 buffery procesoru p\u0159i p\u0159et\u00ed\u017een\u00ed, \u010d\u00edm\u017e se zamez\u00ed \u010dten\u00ed dat, kter\u00e1 nejsou ur\u010dena pro dan\u00e9 aplikace.<\/p>\n<p>Ve videodemonstraci fungov\u00e1n\u00ed zranitelnosti v\u00fdzkumn\u00edci uk\u00e1zali, \u017ee ji lze pou\u017e\u00edt k tomu, aby zjistili, jak\u00e9 webov\u00e9 str\u00e1nky osoba nav\u0161t\u011bvuje v re\u00e1ln\u00e9m \u010dase, ale stejn\u011b snadno ji lze aplikovat pro z\u00edsk\u00e1n\u00ed nap\u0159\u00edklad hesel nebo p\u0159\u00edstupov\u00fdch token\u016f, kter\u00e9 u\u017eivatel\u00e9 pou\u017e\u00edvaj\u00ed pro platebn\u00ed syst\u00e9my.<\/p>\n<\/p>\n<p><video controls=\"controls\" preload=\"metadata\" width=\"750\"><source src=\"https:\/\/techcrunch.com\/wp-content\/uploads\/2019\/05\/demo_720.mp4?_=1\" type=\"video\/mp4\" \/><\/video><\/p>\n<p>Stejn\u011b jako Meltdown a Spectre, ZombieLoad postihuje nejen PC a notebooky, ale tak\u00e9 cloudov\u00e9 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/\"   title=\"servery\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1829\">servery<\/a>. Zranitelnost lze vyu\u017e\u00edt na virtu\u00e1ln\u00edch stroj\u00edch, kter\u00e9 by m\u011bly b\u00fdt izolov\u00e1ny od ostatn\u00edch virtu\u00e1ln\u00edch syst\u00e9m\u016f a jejich hostitelsk\u00fdch za\u0159\u00edzen\u00ed, co\u017e potenci\u00e1ln\u011b m\u016f\u017ee obej\u00edt tuto izolaci. Daniel Gruss, jeden z v\u00fdzkumn\u00edk\u016f, kte\u0159\u00ed zranitelnost objevili, tvrd\u00ed, \u017ee m\u016f\u017ee \u010d\u00edst data ze serverov\u00fdch procesor\u016f stejn\u011b jako z osobn\u00edch po\u010d\u00edta\u010d\u016f. To je potenci\u00e1ln\u011b v\u00e1\u017en\u00fd probl\u00e9m v cloudov\u00fdch prost\u0159ed\u00edch, kde r\u016fzn\u00e9 virtu\u00e1ln\u00ed stroje r\u016fzn\u00fdch klient\u016f pracuj\u00ed na stejn\u00e9m serverov\u00e9m za\u0159\u00edzen\u00ed. A\u010dkoli o \u00fatoc\u00edch pomoc\u00ed ZombieLoad nebyly nikdy ve\u0159ejn\u011b hl\u00e1\u0161eny, v\u00fdzkumn\u00edci nemohou vylou\u010dit, \u017ee se mohly odehr\u00e1t, proto\u017ee kr\u00e1de\u017e dat nemus\u00ed v\u017edy zanech\u00e1vat \u017e\u00e1dn\u00e9 stopy.<\/p>\n<p>Co to znamen\u00e1 pro b\u011b\u017en\u00e9ho u\u017eivatele? Nen\u00ed t\u0159eba panika\u0159it. To rozhodn\u011b nen\u00ed exploit nebo zranitelnost zero-day, kdy \u00fato\u010dn\u00edk m\u016f\u017ee okam\u017eit\u011b ovl\u00e1dnout v\u00e1\u0161 po\u010d\u00edta\u010d. Gruss vysv\u011btluje, \u017ee pou\u017eit\u00ed ZombieLoad je \u201esnaz\u0161\u00ed ne\u017e Spectre\u201c, ale \u201et\u011b\u017e\u0161\u00ed ne\u017e Meltdown\u201c \u2013 ob\u011b vy\u017eaduj\u00ed ur\u010dit\u00fd soubor dovednost\u00ed a \u00fasil\u00ed pro \u00fatok. Ve skute\u010dnosti, abyste provedli \u00fatok pomoc\u00ed ZombieLoad, mus\u00edte n\u011bjak\u00fdm zp\u016fsobem na\u010d\u00edst naka\u017eenou aplikaci a spustit ji, co\u017e \u00fato\u010dn\u00edkovi umo\u017en\u00ed st\u00e1hnout v\u0161echna va\u0161e data. Nicm\u00e9n\u011b existuj\u00ed mnohem jednodu\u0161\u0161\u00ed zp\u016fsoby, jak hacknout po\u010d\u00edta\u010d a ukr\u00e1st je.<\/p>\n<p>Spole\u010dnost Intel ji\u017e vydala mikrok\u00f3d pro opravu zraniteln\u00fdch procesor\u016f, v\u010detn\u011b \u010dip\u016f Intel Xeon, Intel Broadwell, Sandy Bridge, Skylake a Haswell, Intel Kaby Lake, Coffee Lake, Whiskey Lake a Cascade Lake, stejn\u011b jako v\u0161echny procesory Atom a Knights. Dal\u0161\u00ed velk\u00e9 spole\u010dnosti tak\u00e9 vydaly opravy zranitelnosti z jejich strany. Apple, Microsoft a Google pro sv\u016fj prohl\u00ed\u017ee\u010d tak\u00e9 ji\u017e vydaly p\u0159\u00edslu\u0161n\u00e9 z\u00e1platy.<\/p>\n<p>V rozhovoru pro port\u00e1l TechCrunch Intel uvedla, \u017ee aktualizace pro mikrok\u00f3d \u010dip\u016f, stejn\u011b jako p\u0159edchoz\u00ed z\u00e1platy, budou m\u00edt vliv na v\u00fdkon procesor\u016f. Z\u00e1stupce Intelu informoval, \u017ee v\u011bt\u0161ina opraven\u00fdch spot\u0159ebitelsk\u00fdch za\u0159\u00edzen\u00ed m\u016f\u017ee v nejhor\u0161\u00edm p\u0159\u00edpad\u011b ztratit 3% v\u00fdkonu a ztr\u00e1ta a\u017e 9% bude v datov\u00fdch centrech. Podle Intel to v\u0161ak v drtiv\u00e9 v\u011bt\u0161in\u011b sc\u00e9n\u00e1\u0159\u016f nebude patrn\u00e9.<\/p>\n<p>Nicm\u00e9n\u011b s Intelem zcela nesouhlas\u00ed in\u017een\u00fd\u0159i spole\u010dnosti Apple, kte\u0159\u00ed na <noindex><a rel=\"nofollow\" href=\"https:\/\/support.apple.com\/en-us\/HT210108\">speci\u00e1ln\u00ed str\u00e1nce<\/a><\/noindex> O metod\u011b \u00fapln\u00e9 ochrany proti &laquo;Microarchitectural Data Sampling&raquo; (ofici\u00e1ln\u00ed n\u00e1zev ZombieLoad) se tvrd\u00ed, \u017ee pro \u00fapln\u00e9 uzav\u0159en\u00ed zranitelnosti je nutn\u00e9 zcela vypnout technologii Intel Hyper-Threading v procesorech, co\u017e podle test\u016f odborn\u00edk\u016f z Apple m\u016f\u017ee sn\u00ed\u017eit v\u00fdkon u\u017eivatelsk\u00fdch za\u0159\u00edzen\u00ed v n\u011bkter\u00fdch \u00faloh\u00e1ch a\u017e o 40%.<\/p>\n<p>Ani Intel, ani Daniel a jeho t\u00fdm nezve\u0159ejnili k\u00f3d, kter\u00fd by implementoval zranitelnost, tak\u017ee p\u0159\u00edm\u00e9 a bezprost\u0159edn\u00ed ohro\u017een\u00ed pro b\u011b\u017en\u00e9ho u\u017eivatele neexistuje. A rychle vydan\u00e9 z\u00e1platy ji zcela neutralizuj\u00ed, ale vzhledem k tomu, \u017ee ka\u017ed\u00e1 takov\u00e1 oprava u\u017eivatel\u016fm zp\u016fsobuje ur\u010dit\u00e9 ztr\u00e1ty na v\u00fdkonu, maj\u00ed k Intelu ur\u010dit\u00e9 ot\u00e1zky.<\/p>\n<p><center><\/p>\n<p><\/center><\/p>\n<p>\t\t\t\t<center><br \/>\n\t\t\t\t\t\t\t\t<\/center><br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"http:\/\/www.3dnews.ru\/987453\">3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0441\u0442\u044b \u043f\u043e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u0443\u044e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0447\u0438\u043f\u0430\u0445 Intel, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u043a\u0440\u0430\u0436\u0438 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043d\u0435\u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0438\u0437 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430. \u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043d\u0430\u0437\u0432\u0430\u043b\u0438 \u0435\u0451 &laquo;ZombieLoad&raquo;. ZombieLoad &mdash; \u044d\u0442\u043e \u0430\u0442\u0430\u043a\u0430 \u043f\u043e\u0431\u043e\u0447\u043d\u043e\u0433\u043e \u0442\u0438\u043f\u0430, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u0430\u044f \u043d\u0430 \u0447\u0438\u043f\u044b Intel, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0445\u0430\u043a\u0435\u0440\u0430\u043c \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u043a \u0432 \u0438\u0445 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0435 \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445, \u043d\u043e \u043f\u0440\u0438 \u044d\u0442\u043e\u043c \u043e\u043d\u0430 \u043d\u0435 \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0432\u043d\u0435\u0434\u0440\u0438\u0442\u044c \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25371,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33686","post","type-post","status-publish","format-standard","has-post-thumbnail","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=\"\u0421\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0441\u0442\u044b \u043f\u043e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u0443\u044e 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