{"id":33706,"date":"2019-10-31T21:54:17","date_gmt":"2019-10-31T18:54:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli\/"},"modified":"2019-10-31T21:54:17","modified_gmt":"2019-10-31T18:54:17","slug":"novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli","title":{"rendered":"En ny klass av s\u00e5rbarheter p\u00e5 Intel-processorer riskerar att d\u00f6da Hyper-Threading: uppdateringar har sl\u00e4ppts f\u00f6r att st\u00e4nga av dem","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Det skulle verka som om, efter att de s\u00e5rbarheter som uppt\u00e4cktes f\u00f6r mer \u00e4n ett \u00e5r sedan, n\u00e4mligen Meltdown och Spectre, redan har skr\u00e4mt iv\u00e4g alla anv\u00e4ndare och fans av Intel-processorer. \u00c4nd\u00e5 lyckades f\u00f6retaget \u00e5terigen \u00f6verraska oss. Mer exakt, det var forskarna inom s\u00e5rbarhetsforskning i mikroarkitekturen hos Intel-processorer som gjorde det. Paketet av nya s\u00e5rbarheter<\/a><\/noindex> Det som kallas microarchitectural data sampling (MDS) riskerar att s\u00e4tta punkt f\u00f6r teknologin f\u00f6r flertr\u00e5diga ber\u00e4kningar eller Hyper-Threading (i allm\u00e4nhet - simultaneous multithreading, SMT). Det har visat sig att en attack med en av varianterna av MDS kan bryta isoleringen av en av tr\u00e5darna i Hyper-Threading och underl\u00e4tta \u00e5tkomst till k\u00e4nsliga data i buffertar och portar i processorer (ett lager under cacheminnet p\u00e5 f\u00f6rsta niv\u00e5n). Vad ska man g\u00f6ra \u00e5t detta? Det f\u00f6rsta som kommer i \u00e5tanke \u00e4r att st\u00e4nga av Hyper-Threading, vilket ocks\u00e5 \u00e4r vad utvecklarna av ChromeOS har gjort. Vad kommer som konsekvens ske med processorernas prestanda? Den kommer att minska. Grad av nedbromsning kan n\u00e5 40 %, eller mer.<\/p>\n

\"En<\/p>\n

\u00c4n s\u00e5 l\u00e4nge har f\u00e5 systemutvecklare och applikationsutvecklare f\u00f6ljt i ChromeOS:s sp\u00e5r, men patchar och uppdateringar l\u00e5t v\u00e4nta p\u00e5 sig<\/a><\/noindex>. Apple har sl\u00e4ppt uppdateringar f\u00f6r sina egna datorer och b\u00e4rbara datorer som s\u00e5lts sedan 2011. Enligt f\u00f6retaget har alla system som anv\u00e4nder macOS Mojave 10.14 redan blivit patchade<\/a><\/noindex>. Detta kommer att f\u00f6rhindra attacker via Safari och andra applikationer. De flesta anv\u00e4ndare b\u00f6r dock inte m\u00e4rka n\u00e5gon m\u00e4rkbar minskning av prestanda. Fullst\u00e4ndig f\u00f6rhindring av hotet inneb\u00e4r dock att st\u00e4nga av Hyper-Threading, vilket kan minska prestandan med upp till 40 %. Patchar f\u00f6r operativsystemen Sierra och High Sierra kommer ocks\u00e5 att sl\u00e4ppas. Produkten iPhone, iPad och Watch p\u00e5verkas inte av dessa s\u00e5rbarheter.<\/p>\n

Google f\u00f6rbereder patchar f\u00f6r Android och kommer att uppdatera Chrome. Det b\u00f6r n\u00e4mnas att Android bara beh\u00f6ver skyddas mot MDS-s\u00e5rbarheter p\u00e5 x86-kompatibla plattformar (ett s\u00e4rskilt tack till Intel f\u00f6r Atom-processorerna). Patchar f\u00f6r smartphones och surfplattor p\u00e5 Intel-plattformar m\u00e5ste sl\u00e4ppas av enhetsproducenterna, medan Google redan \u00e4r redo att skicka ut den n\u00f6dv\u00e4ndiga korrigerade koden. Chromebooks (Chrome OS) \u00e4r redan skyddade<\/a><\/noindex> patchar mot nya s\u00e5rbarheter, och i framtiden kommer sj\u00e4lva operativsystemet att \u00e5tg\u00e4rdas f\u00f6r detta. Samtidigt uppmanar Google anv\u00e4ndare att s\u00e4kerst\u00e4lla att enhetstillverkarna har sl\u00e4ppt de n\u00f6dv\u00e4ndiga patcharna och (eller) att dessa patchar har tillhandah\u00e5llits till Microsoft och Apple som operativsystemutvecklare. F\u00f6r molnplattformar och datacenter har Google redan spridit<\/a><\/noindex> patchar f\u00f6r att skydda serverprocessorer mot MDS.<\/p>\n

<\/center><\/p>\n

Webbl\u00e4sarutvecklaren Firefox, Mozilla, kommer att sl\u00e4ppa patchade versioner av applikationen den 21 maj. Detta kommer att vara Firefox version 67 och Extended Support Release version 60.7. Webbl\u00e4sarna Firefox Beta och Firefox Nightly inkluderar redan de n\u00f6dv\u00e4ndiga korrigeringarna f\u00f6r att skydda mot den nya s\u00e5rbarheten.<\/p>\n

\"En<\/p>\n

Microsoft har ocks\u00e5 sl\u00e4ppt patchar f\u00f6r operativsystem och molnplattformar. Faktum \u00e4r att f\u00f6retaget rekommenderar att f\u00e5 den korrigerade mikrokoden fr\u00e5n enhetstillverkarna, \u00e4ven om de ocks\u00e5 har skapat en sida<\/a><\/noindex> f\u00f6r att sj\u00e4lvst\u00e4ndigt ladda ner patcharna. I paketet med automatiska uppdateringar via Windows Update har patchen ocks\u00e5 lagts till och kommer att spridas fr\u00e5n och med torsdag. Microsoft Azure-tj\u00e4nsten \u00e4r redan skyddad mot nya s\u00e5rbarheter. Amazon AWS-molntj\u00e4nsten har ocks\u00e5 patchats<\/a><\/noindex>.<\/p>\n

Slutligen har patchar sl\u00e4ppts f\u00f6r operativsystem p\u00e5 Linux, som Red Hat<\/a><\/noindex> och Ubuntu<\/a><\/noindex>. Forts\u00e4ttning f\u00f6ljer.<\/p>\n

<\/p>\n

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\n\t\t\t\t\t\t\t\t<\/center>
K\u00e4lla: 3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u0430\u0437\u0430\u043b\u043e\u0441\u044c \u0431\u044b, \u0447\u0442\u043e \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0445 \u0431\u043e\u043b\u044c\u0448\u0435 \u0433\u043e\u0434\u0430 \u043d\u0430\u0437\u0430\u0434 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 Meltdown \u0438 Spectre \u0443\u0436\u0435 \u043d\u0438\u0447\u0442\u043e \u043d\u0435 \u0438\u0441\u043f\u0443\u0433\u0430\u0435\u0442 \u043f\u043e\u043a\u043b\u043e\u043d\u043d\u0438\u043a\u043e\u0432 \u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel. \u0418 \u0432\u0441\u0451 \u0436\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 \u0441\u043d\u043e\u0432\u0430 \u0443\u0434\u0430\u043b\u043e\u0441\u044c \u043d\u0430\u0441 \u0443\u0434\u0438\u0432\u0438\u0442\u044c. \u0422\u043e\u0447\u043d\u0435\u0435, \u0443\u0434\u0438\u0432\u0438\u043b\u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel. \u041f\u0430\u043a\u0435\u0442 \u043d\u043e\u0432\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043f\u043e\u0434 \u043e\u0431\u0449\u0438\u043c \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c microarchitectural data sampling (MDS) \u0433\u0440\u043e\u0437\u0438\u0442 \u043f\u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043a\u0440\u0435\u0441\u0442 \u043d\u0430 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u044b\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 \u0438\u043b\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25388,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 En ny klass av s\u00e5rbarheter i Intel-processorer riskerar att begrava Hyper-Threading: patchar har sl\u00e4ppts f\u00f6r att st\u00e4nga av den | ProHoster","description":"Det skulle verka som att efter de s\u00e5rbarheter som uppt\u00e4cktes f\u00f6r mer \u00e4n ett \u00e5r sedan, Meltdown och Spectre, skulle inget kunna skr\u00e4mma entusiastiska anv\u00e4ndare av Intel-processorer. \u00c4nd\u00e5 har f\u00f6retagen \u00e5ter lyckats \u00f6verraska oss.","canonical_url":"https:\/\/prohoster.info\/sv\/blog\/news\/novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sv_SE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041d\u043e\u0432\u044b\u0439 \u043a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel \u0440\u0438\u0441\u043a\u0443\u0435\u0442 \u043f\u043e\u0445\u043e\u0440\u043e\u043d\u0438\u0442\u044c Hyper-Threading: \u0432\u044b\u0448\u043b\u0438 \u0437\u0430\u043f\u043b\u0430\u0442\u043a\u0438-\u0432\u044b\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u0438 | ProHoster","og:description":"\u041a\u0430\u0437\u0430\u043b\u043e\u0441\u044c \u0431\u044b, \u0447\u0442\u043e \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0445 \u0431\u043e\u043b\u044c\u0448\u0435 \u0433\u043e\u0434\u0430 \u043d\u0430\u0437\u0430\u0434 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 Meltdown \u0438 Spectre \u0443\u0436\u0435 \u043d\u0438\u0447\u0442\u043e \u043d\u0435 \u0438\u0441\u043f\u0443\u0433\u0430\u0435\u0442 \u043f\u043e\u043a\u043b\u043e\u043d\u043d\u0438\u043a\u043e\u0432 \u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel. \u0418 \u0432\u0441\u0451 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