{"id":33743,"date":"2019-10-31T21:54:27","date_gmt":"2019-10-31T18:54:27","guid":{"rendered":"https:\/\/prohoster.info\/blog\/intel-vam-ne-nuzhno-otklyuchat-hyper-threading-dlya-zashhity-ot-zombieload\/"},"modified":"2019-10-31T21:54:27","modified_gmt":"2019-10-31T18:54:27","slug":"intel-vam-ne-nuzhno-otklyuchat-hyper-threading-dlya-zashhity-ot-zombieload","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/intel-vam-ne-nuzhno-otklyuchat-hyper-threading-dlya-zashhity-ot-zombieload","title":{"rendered":"Intel: nem sz\u00fcks\u00e9ges letiltani a Hyper-Threadinget a ZombieLoad elleni v\u00e9delemhez","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ha miut\u00e1n <noindex><a rel=\"nofollow\" href=\"https:\/\/3dnews.ru\/987453\">az el\u0151z\u0151<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/3dnews.ru\/987490\">h\u00edrekr\u0151l<\/a><\/noindex> Ha p\u00e1nikba esik a ZombieLoad miatt, \u00e9s azt pr\u00f3b\u00e1lja kider\u00edteni, hogyan kell letiltani az Intel Hyper-Threading funkci\u00f3t az \u00faj, Spectre-hez \u00e9s Meltdownhoz hasonl\u00f3 s\u00e9r\u00fcl\u00e9kenys\u00e9g megakad\u00e1lyoz\u00e1sa \u00e9rdek\u00e9ben, \u00e9s sz\u00e9pen l\u00e9legezzen egyet \u2014 az Intel hivatalos \u00fatmutat\u00f3ja l\u00e9nyeg\u00e9ben nem javasolja ezt a legt\u00f6bb esetben.<\/p>\n<p><img decoding=\"async\" alt=\"Intel: nem sz\u00fcks\u00e9ges letiltani a Hyper-Threadinget a ZombieLoad elleni v\u00e9delemhez\" src=\"\/wp-content\/uploads\/2019\/05\/73d7224af717e8bffb2bd192dbf2f983.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>A ZombieLoad hasonl\u00f3 a kor\u00e1bbi \u201emell\u00e9kcsatorna\u201d t\u00e1mad\u00e1sokhoz, amelyek arra k\u00e9nyszer\u00edtik az Intel processzorokat, hogy hozz\u00e1f\u00e9r\u00e9st ny\u00fajtsanak potenci\u00e1lisan bizalmas inform\u00e1ci\u00f3khoz, amelyek \u00e1ltal\u00e1ban elszigeteltek \u00e9s csak a haszn\u00e1l\u00f3iknak el\u00e9rhet\u0151k. A biztons\u00e1gi kutat\u00f3k kor\u00e1bban arr\u00f3l sz\u00e1moltak be, hogy ez a s\u00e9r\u00fcl\u00e9kenys\u00e9g a legt\u00f6bb Intel chipben megtal\u00e1lhat\u00f3, \u00e9s kihaszn\u00e1lhat\u00f3 Windows, MacOS \u00e9s Linux rendszereken.<\/p>\n<p><img decoding=\"async\" alt=\"Intel: nem sz\u00fcks\u00e9ges letiltani a Hyper-Threadinget a ZombieLoad elleni v\u00e9delemhez\" src=\"\/wp-content\/uploads\/2019\/05\/0706a11536c570e2beecce189e88670d.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Az Intel a maga r\u00e9sz\u00e9r\u0151l nem \u00e9rt egyet azzal, hogy mennyire s\u00falyos a ZombieLoad kock\u00e1zata. A c\u00e9g m\u00e9g egy m\u00e1sik nevet is adott a ZombieLoadnak \u2014 Mikroarchitekt\u00far\u00e1s Adatmintav\u00e9tel (MDS). Ezzel egyet\u00e9rthet\u00fcnk, hogy sokkal kev\u00e9sb\u00e9 f\u00e9lelmetes, mint valamilyen zombira hivatkozni.<\/p>\n<p><center><\/center><\/p>\n<p>\u201eAz MDS s\u00e9r\u00fcl\u00e9kenys\u00e9ge az adatok mintav\u00e9telez\u00e9s\u00e9n alapul, amelyek \u00e1tsziv\u00e1rognak a CPU kis strukt\u00far\u00e1ib\u00f3l, amikor helyileg v\u00e9grehajtott mell\u00e9kcsatorn\u00e1s spekulat\u00edv v\u00e9grehajt\u00e1st haszn\u00e1lnak\u201d \u2013 magyar\u00e1zz\u00e1k a c\u00e9gn\u00e9l. \u201eAz MDS gyakorlati kihaszn\u00e1l\u00e1sa nagyon komplex feladat. Maga a s\u00e9r\u00fcl\u00e9kenys\u00e9g nem biztos\u00edt m\u00f3dot a t\u00e1mad\u00f3nak arra, hogy kiv\u00e1lasztja azokat az adatokat, amelyeket meg szeretne szerezni.\u201d<\/p>\n<p>\u201eAz MDS m\u00e1r hardveresen is orvosolva van sok leg\u00fajabb Intel Core 8. \u00e9s 9. gener\u00e1ci\u00f3s processzorunkban, valamint a m\u00e1sodik gener\u00e1ci\u00f3s Intel Xeon Scalable processzorcsal\u00e1dban\u201d \u2013 \u00e1ll a c\u00e9g nyilatkozat\u00e1ban. \u201eA t\u00f6bbi \u00e9rintett term\u00e9k eset\u00e9ben a kock\u00e1zat cs\u00f6kkent\u00e9s\u00e9re vonatkoz\u00f3 int\u00e9zked\u00e9sek el\u00e9rhet\u0151k a mikrok\u00f3d friss\u00edt\u00e9s\u00e9vel egy\u00fctt a megfelel\u0151 oper\u00e1ci\u00f3s rendszer \u00e9s hipervizor szoftverfriss\u00edt\u00e9sekkel, amelyek m\u00e1r a mai napt\u00f3l el\u00e9rhet\u0151k. Mi biztos\u00edtottuk <noindex><a rel=\"nofollow\" href=\"https:\/\/www.intel.com\/content\/www\/us\/en\/architecture-and-technology\/mds.html\">t\u00f6bb inform\u00e1ci\u00f3t<\/a><\/noindex> a weboldalunkon, \u00e9s tov\u00e1bbra is arra b\u00e1tor\u00edtunk mindenkit, hogy tartsa naprak\u00e9szen a rendszereit, mivel ez az egyik legjobb m\u00f3dja a biztons\u00e1g garant\u00e1l\u00e1s\u00e1nak.<\/p>\n<p><img decoding=\"async\" alt=\"Intel: nem sz\u00fcks\u00e9ges letiltani a Hyper-Threadinget a ZombieLoad elleni v\u00e9delemhez\" src=\"\/wp-content\/uploads\/2019\/05\/5fa1b8b81f4385c74d360075f5e7769b.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Az Intel k\u00e9pvisel\u0151i azt is megjegyezt\u00e9k, hogy a ZombieLoad kutat\u00f3csoport egy\u00fctt dolgozott a v\u00e1llalattal \u00e9s m\u00e1s szakemberekkel a PC-iparban, hogy kijav\u00edts\u00e1k a sebezhet\u0151s\u00e9get, miel\u0151tt az nyilv\u00e1noss\u00e1gra ker\u00fclt volna. \u201eSzeretn\u00e9nk k\u00f6sz\u00f6netet mondani a kutat\u00f3knak, akik vel\u00fcnk dolgoztak, \u00e9s ipar\u00e1gi partnereinknek a probl\u00e9ma koordin\u00e1lt megold\u00e1s\u00e1hoz ny\u00fajtott hozz\u00e1j\u00e1rul\u00e1suk\u00e9rt\u201d - mondt\u00e1k.<\/p>\n<p><strong>Mi \u00fajs\u00e1g a Hyper-Threadinggel?<\/strong><\/p>\n<p>Az Intel kijelentette, hogy a Hyper-Threading kikapcsol\u00e1sa nem k\u00f6telez\u0151 \u00e9s nem az egyetlen lehet\u0151s\u00e9g a PC-felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra. Val\u00f3j\u00e1ban az Intel szerint minden \u00fcgyf\u00e9l egyedileg d\u00f6nt arr\u00f3l, hogy mit tegyen. Ha nem tudja garant\u00e1lni a telep\u00edtett szoftvere biztons\u00e1g\u00e1t, akkor igen, val\u00f3sz\u00edn\u0171leg a Hyper-Threading kikapcsol\u00e1sa j\u00f3 \u00f6tlet. Ha viszont a szoftver csak a Microsoft boltj\u00e1b\u00f3l, az IT r\u00e9szlegb\u0151l, vagy egyszer\u0171en az \u00d6n \u00e1ltal megb\u00edzhat\u00f3nak tartott forr\u00e1sokb\u00f3l sz\u00e1rmazik, akkor val\u00f3sz\u00edn\u0171leg hagyhatja bekapcsolva a Hyper-Threadinget. Minden igaz\u00e1b\u00f3l att\u00f3l f\u00fcgg, hogy mennyire agg\u00f3dik a biztons\u00e1ga miatt.<\/p>\n<p>\u201eMivel a t\u00e9nyez\u0151k jelent\u0151sen elt\u00e9rhetnek a k\u00fcl\u00f6nb\u00f6z\u0151 \u00fcgyfelek sz\u00e1m\u00e1ra, az Intel nem javasolja a Hyper-Threading kikapcsol\u00e1s\u00e1t, mivel fontos meg\u00e9rteni, hogy ez nem az egyetlen m\u00f3dja az MDS elleni v\u00e9delemnek, \u00e9s \u00f6nmag\u00e1ban nem ny\u00fajt v\u00e9delmet\u201d - \u00e1ll a v\u00e1llalat nyilatkozat\u00e1ban.<\/p>\n<p>Ugyanakkor az oper\u00e1ci\u00f3s rendszerek gy\u00e1rt\u00f3inak reakci\u00f3i elt\u00e9rnek egym\u00e1st\u00f3l.<\/p>\n<p>A Google kiadott egy jav\u00edt\u00e1st a Chrome OS-hez, amely alap\u00e9rtelmez\u00e9s szerint letiltja a Hyper-Threadinget a Chromebookok eset\u00e9ben. Azok, akik vissza akarj\u00e1k \u00e1ll\u00edtani a t\u00f6bb sz\u00e1l\u00fa technol\u00f3gi\u00e1t, ezt \u00f6n\u00e1ll\u00f3an megtehetik, v\u00e9lik a c\u00e9gn\u00e9l.<\/p>\n<p>Az Apple friss\u00edt\u00e9st adott ki a MacOS Mojave-hoz, \u00e9s t\u00e1j\u00e9koztatta, hogy az \u00fcgyfelek, k\u00fcl\u00f6n\u00f6sen a biztons\u00e1g ir\u00e1nt ig\u00e9nyesek, maguk is letilthatj\u00e1k a Hyper-Threadinget.<\/p>\n<p>A Microsoft kijelentette, hogy kiadta a jav\u00edt\u00e1sokat a szoftver\u00e9hez, hogy cs\u00f6kkentse az MDS kihaszn\u00e1l\u00e1s\u00e1nak val\u00f3sz\u00edn\u0171s\u00e9g\u00e9t, de megjegyezte, hogy az \u00fcgyfeleknek tov\u00e1bbi firmware-friss\u00edt\u00e9st kell beszerezni\u00fck a sz\u00e1m\u00edt\u00f3g\u00e9pgy\u00e1rt\u00f3ikt\u00f3l.<\/p>\n<p>Mivel a legt\u00f6bb oper\u00e1ci\u00f3s rendszer szolg\u00e1ltat\u00f3 \u00fagy d\u00f6nt\u00f6tt, hogy bekapcsolva hagyja a Hyper-Threadinget, a ZombieLoad fenyeget\u00e9se nyilv\u00e1nval\u00f3an nem olyan komoly, mint amilyennek m\u00e9g 24 \u00f3r\u00e1val ezel\u0151tt t\u0171nt. Ezen k\u00edv\u00fcl eddig egyetlen ismert eset sincs a s\u00e9r\u00fcl\u00e9kenys\u00e9g val\u00f3di t\u00e1mad\u00e1sban val\u00f3 felhaszn\u00e1l\u00e1s\u00e1r\u00f3l.<\/p>\n<p>A Hyper-Threading technol\u00f3gia kikapcsol\u00e1sa n\u00e9lk\u00fcli foltoz\u00e1s azonban szinte nem cs\u00f6kkenti az Intel processzorok teljes\u00edtm\u00e9ny\u00e9t.<\/p>\n<p><img decoding=\"async\" alt=\"Intel: nem sz\u00fcks\u00e9ges letiltani a Hyper-Threadinget a ZombieLoad elleni v\u00e9delemhez\" src=\"\/wp-content\/uploads\/2019\/05\/f935e17deca18db40b97e87f816efd7b.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>De nem fogja elhinni, ha megn\u00e9zi a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.intel.com\/content\/www\/us\/en\/architecture-and-technology\/mds.html\">tesztel\u00e9si eredm\u00e9nyeket<\/a><\/noindex> az Intel \u00e1ltal a biztons\u00e1gi jav\u00edt\u00e1sok teljes\u00edtm\u00e9nyre gyakorolt hat\u00e1s\u00e1r\u00f3l kikapcsolt Hyper-Threading mellett. A c\u00e9g \u00e1ll\u00edtja, hogy a biztons\u00e1gi jav\u00edt\u00e1sok a Hyper-Threading kikapcsol\u00e1s\u00e1val furcs\u00e1n kicsi hat\u00e1st gyakorolnak a teljes\u00edtm\u00e9nyre.<\/p>\n<p><img decoding=\"async\" alt=\"Intel: nem sz\u00fcks\u00e9ges letiltani a Hyper-Threadinget a ZombieLoad elleni v\u00e9delemhez\" src=\"\/wp-content\/uploads\/2019\/05\/af2cf9279537781a0df6a2d344f6120f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>A port\u00e1l <noindex><a rel=\"nofollow\" href=\"https:\/\/www.pcworld.com\/\">PCWorld<\/a><\/noindex> hat\u00e1rozottan nem \u00e9rt egyet az Intel v\u00e9lem\u00e9ny\u00e9vel arr\u00f3l, hogy a Hyper-Threading kikapcsol\u00e1sa nem jelent k\u00fcl\u00f6n\u00f6sebb probl\u00e9m\u00e1t, annak ellen\u00e9re, hogy az Intel a dokumentum\u00e1ban azt \u00e1ll\u00edtja, hogy a teljes\u00edtm\u00e9ny gyakorlatilag nem v\u00e1ltozott. A probl\u00e9ma az Intel tesztjeinek mesters\u00e9gess\u00e9g\u00e9ben rejlik a Hyper-Threading kikapcsol\u00e1sakor, mivel a c\u00e9g nem tesztelt specifikus t\u00f6bb sz\u00e1lon fut\u00f3 terhel\u00e9seket. Ha az Intel a Blender, Cinebench vagy m\u00e1s, t\u00f6bb magra \u00e9s t\u00f6bb sz\u00e1lra optimaliz\u00e1lt teszteket haszn\u00e1lta volna, azonnal egy hatalmas teljes\u00edtm\u00e9nycs\u00f6kken\u00e9st l\u00e1ttunk volna.<\/p>\n<p>A Hyper-Threading technol\u00f3gia fontoss\u00e1g\u00e1t egyszer\u0171en az Intel i9-9900K $500-os \u00e9s az i7-9700K $375-os processzorainak \u00f6sszehasonl\u00edt\u00e1s\u00e1val is szeml\u00e9ltethetj\u00fck, amelyek f\u0151 k\u00fcl\u00f6nbs\u00e9ge \u00e9ppen a Hyper-Threading t\u00e1mogat\u00e1sa. A Hyper-Threading kikapcsol\u00e1sa az Intel processzorokon \u00f3ri\u00e1si csap\u00e1st jelent mindenki sz\u00e1m\u00e1ra, akinek fontos a t\u00f6bb sz\u00e1lon t\u00f6rt\u00e9n\u0151 teljes\u00edtm\u00e9ny.<\/p>\n<p>De van j\u00f3 h\u00edr azok sz\u00e1m\u00e1ra, akik a leg\u00fajabb Intel processzorokat haszn\u00e1lj\u00e1k. A c\u00e9g \u00e1ll\u00edt\u00e1sa szerint sok leg\u00fajabb, 8. \u00e9s 9. gener\u00e1ci\u00f3s processzoruk m\u00e1r rendelkezik hardvermikrok\u00f3d jav\u00edt\u00e1sokkal, ez\u00e9rt az i9-9900K tulajdonosainak nincs oka a Hyper-Threading kikapcsol\u00e1s\u00e1ra. A ZombieLoad vesz\u00e9lye nyilv\u00e1nval\u00f3an nagyobb a r\u00e9gebbi processzorokn\u00e1l. Az \u00e9rintett rendszerek tulajdonosainak a m\u0171k\u00f6d\u0151 oper\u00e1ci\u00f3s rendszer \u00e9s szoftver friss\u00edt\u00e9sekre, valamint az \u00e1ltaluk haszn\u00e1lt v\u00edruskeres\u0151 megold\u00e1sokra kell t\u00e1maszkodniuk a k\u00e1ros k\u00f3dok kock\u00e1zat\u00e1nak cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben. Eml\u00e9keztetj\u00fck arra is, hogy egyetlen, ZombieLoad-ot felhaszn\u00e1l\u00f3 t\u00e1mad\u00e1st sem ismer\u00fcnk eddig.<\/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\/987517\">3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0415\u0441\u043b\u0438 \u043f\u043e\u0441\u043b\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445 \u043d\u043e\u0432\u043e\u0441\u0442\u0435\u0439 \u043e ZombieLoad \u0432\u044b \u0432 \u043f\u0430\u043d\u0438\u043a\u0435 \u0432\u044b\u044f\u0441\u043d\u044f\u0435\u0442\u0435, \u043a\u0430\u043a \u043e\u0442\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u044e Intel Hyper-Threading, \u0447\u0442\u043e\u0431\u044b \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0442\u0438\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043d\u043e\u0432\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0445\u043e\u0436\u0435\u0439 \u043d\u0430 Spectre \u0438 Meltdown, \u0442\u043e \u0441\u0434\u0435\u043b\u0430\u0439\u0442\u0435 \u0433\u043b\u0443\u0431\u043e\u043a\u0438\u0439 \u0432\u044b\u0434\u043e\u0445 &mdash; \u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0435 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e Intel \u0444\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u043d\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442 \u0434\u0435\u043b\u0430\u0442\u044c \u044d\u0442\u043e \u0434\u043b\u044f \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0430 \u0441\u043b\u0443\u0447\u0430\u0435\u0432. ZombieLoad \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u0430 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u043c \u0430\u0442\u0430\u043a\u0430\u043c \u043f\u043e &laquo;\u043f\u043e\u0431\u043e\u0447\u043d\u044b\u043c \u043a\u0430\u043d\u0430\u043b\u0430\u043c&raquo; (\u0430\u043d\u0433\u043b. side-channel attack), \u0432\u044b\u043d\u0443\u0436\u0434\u0430\u044e\u0449\u0438\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b Intel \u043e\u0442\u043a\u0440\u044b\u0432\u0430\u0442\u044c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25423,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33743","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 - 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