{"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\/hu\/blog\/news\/novaya-uyazvimost-zatragivaet-prakticheski-kazhdyj-chip-intel-proizvedyonnyj-s-2011-goda","title":{"rendered":"Az \u00faj sebezhet\u0151s\u00e9g szinte minden 2011-ben gy\u00e1rtott Intel chipet \u00e9rint","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Inform\u00e1ci\u00f3biztons\u00e1gi szak\u00e9rt\u0151k \u00faj s\u00e9r\u00fcl\u00e9kenys\u00e9get fedeztek fel az Intel chipekben, amelyet a t\u00e1mad\u00f3k felhaszn\u00e1lhatnak bizalmas inform\u00e1ci\u00f3k k\u00f6zvetlen\u00fcl a processzorb\u00f3l t\u00f6rt\u00e9n\u0151 lop\u00e1s\u00e1ra. A kutat\u00f3k \"ZombieLoad\"-nak nevezt\u00e9k el. A ZombieLoad egy oldals\u00f3 t\u00edpus\u00fa t\u00e1mad\u00e1s, amely az Intel chipekre ir\u00e1nyul, lehet\u0151v\u00e9 t\u00e9ve a hackerek sz\u00e1m\u00e1ra, hogy hat\u00e9konyan kihaszn\u00e1lj\u00e1k az architekt\u00far\u00e1jukban rejl\u0151 hi\u00e1nyoss\u00e1gokat tetsz\u0151leges adatok megszerz\u00e9s\u00e9re, de ez nem ad lehet\u0151s\u00e9get arra, hogy tetsz\u0151leges rosszindulat\u00fa k\u00f3dot be\u00e9p\u00edtsenek \u00e9s v\u00e9grehajtsanak, \u00edgy \u00f6n\u00e1ll\u00f3 eszk\u00f6zk\u00e9nt nem lehet haszn\u00e1lni t\u00e1voli sz\u00e1m\u00edt\u00f3g\u00e9pek megszerz\u00e9s\u00e9re \u00e9s felt\u00f6r\u00e9s\u00e9re.<\/p>\n<p><img decoding=\"async\" alt=\"Az \u00faj sebezhet\u0151s\u00e9g szinte minden 2011-ben gy\u00e1rtott Intel chipet \u00e9rint\" src=\"\/wp-content\/uploads\/2019\/05\/1da259be37db8107eeac1fde735cd09d.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Az Intel t\u00e1j\u00e9koztat\u00e1sa szerint a ZombieLoad n\u00e9gy hib\u00e1t k\u00e9pvisel a chipjeik mikrok\u00f3dj\u00e1ban, amelyeket a kutat\u00f3k mind\u00f6ssze egy h\u00f3nappal ezel\u0151tt jelentettek be a c\u00e9gnek. A sebezhet\u0151s\u00e9gek szinte minden Intel chippel rendelkez\u0151 sz\u00e1m\u00edt\u00f3g\u00e9pet \u00e9rintenek, amelyek 2011 \u00f3ta k\u00e9sz\u00fcltek. Az ARM \u00e9s AMD chipek nem \u00e9rz\u00e9kenyek erre a sebezhet\u0151s\u00e9gre.<\/p>\n<p>A ZombieLoad eml\u00e9keztet a kor\u00e1bbi Meltdown \u00e9s Spectre sebezhet\u0151s\u00e9gekre, amelyek a spekulat\u00edv (el\u0151rejelz\u0151) utas\u00edt\u00e1s-v\u00e9grehajt\u00e1si rendszer hib\u00e1j\u00e1t haszn\u00e1lt\u00e1k ki. A spekulat\u00edv v\u00e9grehajt\u00e1s seg\u00edti a processzorokat abban, hogy bizonyos m\u00e9rt\u00e9kig el\u0151rejelezni tudj\u00e1k, mi lehet sz\u00fcks\u00e9ges egy alkalmaz\u00e1snak vagy oper\u00e1ci\u00f3s rendszernek a k\u00f6zeli j\u00f6v\u0151ben, lehet\u0151v\u00e9 t\u00e9ve, hogy az alkalmaz\u00e1s gyorsabban \u00e9s hat\u00e9konyabban m\u0171k\u00f6dj\u00f6n. A processzor visszaadja a becsl\u00e9s\u00e9nek eredm\u00e9nyeit, ha azok helyesnek bizonyulnak, vagy visszavonja a v\u00e9grehajt\u00e1s eredm\u00e9nyeit, ha az el\u0151rejelz\u00e9s hamisnak bizonyul. A Meltdown \u00e9s a Spectre is kihaszn\u00e1lja ezt a funkci\u00f3t azzal a c\u00e9llal, hogy k\u00f6zvetlen hozz\u00e1f\u00e9r\u00e9st nyerjenek a processzor \u00e1ltal kezelt inform\u00e1ci\u00f3khoz.<\/p>\n<p><center><\/center><\/p>\n<p>A ZombieLoad jelent\u00e9se \"zombi bet\u00f6lt\u00e9s\", ami r\u00e9szben elmagyar\u00e1zza a s\u00e9r\u00fcl\u00e9kenys\u00e9g mechanizmus\u00e1t. A t\u00e1mad\u00e1s sor\u00e1n a processzorhoz olyan mennyis\u00e9g\u0171 adatot k\u00fcldenek, amelyet nem k\u00e9pes megfelel\u0151en feldolgozni, ez arra k\u00e9nyszer\u00edti a processzort, hogy a mikrok\u00f3d seg\u00edts\u00e9g\u00e9t k\u00e9rje a rendszer le\u00e1ll\u00e1s\u00e1nak megakad\u00e1lyoz\u00e1s\u00e1ra. \u00c1ltal\u00e1ban az alkalmaz\u00e1sok csak saj\u00e1t adataikat l\u00e1thatj\u00e1k, de a processzor t\u00falterhel\u00e9se \u00e1ltal kiv\u00e1ltott hiba lehet\u0151v\u00e9 teszi ennek a korl\u00e1toz\u00e1snak a megker\u00fcl\u00e9s\u00e9t. A kutat\u00f3k azt \u00e1ll\u00edtott\u00e1k, hogy a ZombieLoad k\u00e9pes a processzor magjai \u00e1ltal haszn\u00e1lt b\u00e1rmilyen adat megszerz\u00e9s\u00e9re. Az Intel bejelentette, hogy a mikrok\u00f3d jav\u00edt\u00e1sa seg\u00edthet a processzor puffer\u00e9nek tiszt\u00edt\u00e1s\u00e1ban t\u00falterhel\u00e9s eset\u00e9n, megakad\u00e1lyozva, hogy az alkalmaz\u00e1sok nem kell\u0151en uralt adatokat olvassanak.<\/p>\n<p>A sebezhet\u0151s\u00e9g m\u0171k\u00f6d\u00e9s\u00e9nek vide\u00f3bemutat\u00f3j\u00e1ban a kutat\u00f3k megmutatt\u00e1k, hogy azt arra lehet haszn\u00e1lni, hogy valaki val\u00f3s id\u0151ben megtudja, mely weboldalakat l\u00e1togat, de ugyan\u00edgy k\u00f6nnyen alkalmazhat\u00f3 p\u00e9ld\u00e1ul a felhaszn\u00e1l\u00f3k \u00e1ltal a fizet\u00e9si rendszerekhez haszn\u00e1lt jelszavak vagy hozz\u00e1f\u00e9r\u00e9si tokenek megszerz\u00e9s\u00e9re is.<\/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>A Meltdownhoz \u00e9s Spectre-hez hasonl\u00f3an a ZombieLoad nemcsak PC-ket \u00e9s laptopokat, hanem felh\u0151szolg\u00e1ltat\u00e1sokat is \u00e9rint. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/\"   title=\"szerverek\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1829\">szerverek<\/a>A sebezhet\u0151s\u00e9get virtu\u00e1lis g\u00e9peken is ki lehet haszn\u00e1lni, amelyeknek szigetelteknek kell lenni\u00fck m\u00e1s virtu\u00e1lis rendszerekt\u0151l \u00e9s azok gazdaeszk\u00f6zeit\u0151l, lehet\u0151v\u00e9 t\u00e9ve e szigetel\u00e9s megker\u00fcl\u00e9s\u00e9t. Daniel Gruss, egy a sebezhet\u0151s\u00e9get felfedez\u0151 kutat\u00f3 azt \u00e1ll\u00edtja, hogy az adatokat a szerverprocesszorokb\u00f3l k\u00e9pes olvasni, ahogy a szem\u00e9lyi sz\u00e1m\u00edt\u00f3g\u00e9peken is. Ez potenci\u00e1lisan komoly probl\u00e9ma a felh\u0151alap\u00fa k\u00f6rnyezetekben, ahol k\u00fcl\u00f6nb\u00f6z\u0151 \u00fcgyfelek virtu\u00e1lis g\u00e9pei ugyanazon a szerverhardveren m\u0171k\u00f6dnek. B\u00e1r soha nem jelentettek nyilv\u00e1nosan t\u00e1mad\u00e1sokat ZombieLoad haszn\u00e1lat\u00e1val, a kutat\u00f3k nem z\u00e1rj\u00e1k ki, hogy azok megt\u00f6rt\u00e9ntek, mivel a data-ellop\u00e1sok nem mindig hagynak maguk ut\u00e1n nyomokat.<\/p>\n<p>Mit jelent ez a h\u00e9tk\u00f6znapi felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra? Nincs sz\u00fcks\u00e9g p\u00e1nikra. Ez kor\u00e1ntsem olyan exploit vagy nulladik napi s\u00e9r\u00fcl\u00e9kenys\u00e9g, amely lehet\u0151v\u00e9 tenn\u00e9 a kiberb\u0171n\u00f6z\u0151k sz\u00e1m\u00e1ra, hogy egy pillanat alatt elfogj\u00e1k a sz\u00e1m\u00edt\u00f3g\u00e9p\u00fcnket. Gruss elmagyar\u00e1zza, hogy a ZombieLoad alkalmaz\u00e1sa \"k\u00f6nnyebb, mint a Spectre\", de \"nehezebb, mint a Meltdown\" \u2014 mindkett\u0151 megk\u00f6vetel egy bizonyos k\u00e9szs\u00e9gi szintet \u00e9s er\u0151fesz\u00edt\u00e9seket az alkalmaz\u00e1s t\u00e1mad\u00e1s\u00e1hoz. Val\u00f3j\u00e1ban a ZombieLoad haszn\u00e1lat\u00e1val v\u00e9grehajtott t\u00e1mad\u00e1s v\u00e9grehajt\u00e1s\u00e1hoz valamilyen m\u00f3don fel kell t\u00f6ltenie egy fert\u0151z\u00f6tt alkalmaz\u00e1st, \u00e9s saj\u00e1t mag\u00e1nak kell azt futtatnia, ezut\u00e1n a s\u00e9r\u00fcl\u00e9kenys\u00e9g seg\u00edt a kiberb\u0171n\u00f6z\u0151nek let\u00f6lteni minden adatait. Mindazon\u00e1ltal sokkal egyszer\u0171bb m\u00f3dok is l\u00e9teznek a sz\u00e1m\u00edt\u00f3g\u00e9p felt\u00f6r\u00e9s\u00e9re \u00e9s az adatok ellop\u00e1s\u00e1ra.<\/p>\n<p>Az Intel Corporation m\u00e1r kiadta a mikrok\u00f3dot a sebezhet\u0151 processzorok jav\u00edt\u00e1s\u00e1ra, bele\u00e9rtve az Intel Xeon, Intel Broadwell, Sandy Bridge, Skylake \u00e9s Haswell, Intel Kaby Lake, Coffee Lake, Whiskey Lake \u00e9s Cascade Lake chipjeit, valamint minden Atom \u00e9s Knights processzort. M\u00e1s nagyv\u00e1llalatok is kiadt\u00e1k a sebezhet\u0151s\u00e9g jav\u00edt\u00e1s\u00e1t maguk fel\u0151l. Az Apple, a Microsoft \u00e9s a Google is m\u00e1r kiadt\u00e1k a megfelel\u0151 jav\u00edt\u00e1sokat a b\u00f6ng\u00e9sz\u0151j\u00fckh\u00f6z.<\/p>\n<p>A TechCrunch port\u00e1lnak adott interj\u00faban az Intel kijelentette, hogy a chipek mikrok\u00f3dfriss\u00edt\u00e9sei, ak\u00e1rcsak a kor\u00e1bbi jav\u00edt\u00e1sok, hat\u00e1ssal lesznek a processzorok teljes\u00edtm\u00e9ny\u00e9re. Az Intel egy k\u00e9pvisel\u0151je elmondta, hogy a legt\u00f6bb jav\u00edtott fogyaszt\u00f3i eszk\u00f6z a legrosszabb esetben 3%-os teljes\u00edtm\u00e9nycs\u00f6kken\u00e9st szenvedhet el, m\u00edg az adatk\u00f6zpontok sz\u00e1m\u00e1ra ak\u00e1r 9%-os cs\u00f6kken\u00e9s is v\u00e1rhat\u00f3. Az Intel azonban \u00fagy v\u00e9li, ez a legt\u00f6bb forgat\u00f3k\u00f6nyvben nem lesz \u00e9szlelhet\u0151.<\/p>\n<p>Az Apple m\u00e9rn\u00f6kei ezzel azonban teljesen nem \u00e9rtenek egyet, akik a <noindex><a rel=\"nofollow\" href=\"https:\/\/support.apple.com\/en-us\/HT210108\">k\u00fcl\u00f6n erre a c\u00e9lra l\u00e9trehozott oldalon<\/a><\/noindex> A teljes v\u00e9delmi m\u00f3dszerr\u0151l az &laquo;Microarchitectural Data Sampling&raquo; (hivatalosan ZombieLoad) elnevez\u00e9s\u00e9vel azt \u00e1ll\u00edtj\u00e1k, hogy a s\u00e9r\u00fcl\u00e9kenys\u00e9g v\u00e9gleges megold\u00e1s\u00e1hoz teljesen le kell tiltani az Intel Hyper-Threading technol\u00f3gi\u00e1t a processzorokban, ami az Apple szak\u00e9rt\u0151inek tesztjei szerint 40%-kal cs\u00f6kkentheti a felhaszn\u00e1l\u00f3i eszk\u00f6z\u00f6k teljes\u00edtm\u00e9ny\u00e9t bizonyos feladatok sor\u00e1n.<\/p>\n<p>Sem az Intel, sem Daniel \u00e9s csapata nem tette k\u00f6zz\u00e9 a sebezhet\u0151s\u00e9get megval\u00f3s\u00edt\u00f3 k\u00f3dot, ez\u00e9rt k\u00f6zvetlen \u00e9s azonnali fenyeget\u00e9s nincs a h\u00e9tk\u00f6znapi felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra. Azonnal kiadott jav\u00edt\u00e1sok azonban teljes m\u00e9rt\u00e9kben semleges\u00edtik azt, de figyelembe v\u00e9ve, hogy minden ilyen jav\u00edt\u00e1s a felhaszn\u00e1l\u00f3knak bizonyos teljes\u00edtm\u00e9nyvesztes\u00e9get okoz, az Intel fel\u00e9 k\u00e9rd\u00e9sek mer\u00fclnek fel.<\/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 \/>Forr\u00e1s: <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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