{"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\/cs\/blog\/news\/novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli","title":{"rendered":"Nov\u00e1 t\u0159\u00edda zranitelnost\u00ed procesor\u016f Intel m\u016f\u017ee poh\u0159b\u00edt Hyper-Threading: byly vyd\u00e1ny opravy-vyp\u00edna\u010de","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Na prvn\u00ed pohled se zd\u00e1, \u017ee po nalezen\u00fdch zranitelnostech Meltdown a Spectre, kter\u00e9 byly odhaleny p\u0159ed v\u00edce ne\u017e rokem, u\u017e nem\u016f\u017ee nic vyd\u011bsit fanou\u0161ky a u\u017eivatele procesor\u016f Intel. P\u0159esto n\u00e1s spole\u010dnosti znovu dok\u00e1zaly p\u0159ekvapit. P\u0159esn\u011bji, zranitelnosti v mikroarchitektu\u0159e procesor\u016f Intel n\u00e1s op\u011bt ohromily. Bal\u00ed\u010dek nov\u00fdch zranitelnost\u00ed<\/a><\/noindex> Pod spole\u010dn\u00fdm n\u00e1zvem microarchitectural data sampling (MDS) hroz\u00ed, \u017ee definitivn\u011b ukon\u010d\u00ed technologii v\u00edcestup\u0148ov\u00e9ho zpracov\u00e1n\u00ed nebo Hyper-Threading (v obecn\u00e9 rovin\u011b \u2015 simult\u00e1nn\u00ed v\u00edcestup\u0148ov\u00e9 zpracov\u00e1n\u00ed, SMT). Uk\u00e1zalo se, \u017ee \u00fatok pomoc\u00ed jedn\u00e9 z variant MDS m\u016f\u017ee p\u0159eru\u0161it izolaci jednoho z vl\u00e1ken Hyper-Threading a usnadnit p\u0159\u00edstup k citliv\u00fdm dat\u016fm v bufferech a portech procesor\u016f (na \u00farovni pod cache pam\u011bt\u00ed prvn\u00ed \u00farovn\u011b). Co s t\u00edm d\u011blat? Prvn\u00ed, co m\u011b napad\u00e1, je vypnout Hyper-Threading, co\u017e v\u00fdvoj\u00e1\u0159i ChromeOS u\u017e ud\u011blali. Jak\u00fd dopad to bude m\u00edt na v\u00fdkon procesor\u016f? Ten se sn\u00ed\u017e\u00ed. M\u00edra zpomalen\u00ed m\u016f\u017ee dos\u00e1hnout a\u017e 40 %, nebo i v\u00edce.<\/p>\n

\"Nov\u00e1<\/p>\n

Zat\u00edm pouze m\u00e1lo v\u00fdvoj\u00e1\u0159\u016f opera\u010dn\u00edch syst\u00e9m\u016f a aplikac\u00ed se vydalo cestou ChromeOS, ale opravy a aktualizace se nenechaly dlouho \u010dekat<\/a><\/noindex>. Spole\u010dnost Apple vydala aktualizace pro sv\u00e9 po\u010d\u00edta\u010de a notebooky prod\u00e1van\u00e9 od roku 2011. Podle spole\u010dnosti byly v\u0161echny syst\u00e9my b\u011b\u017e\u00edc\u00ed na macOS Mojave 10.14 ji\u017e opraveny<\/a><\/noindex>. To zabr\u00e1n\u00ed \u00fatok\u016fm prost\u0159ednictv\u00edm Safari a dal\u0161\u00edch aplikac\u00ed. P\u0159itom v\u011bt\u0161ina u\u017eivatel\u016f by nem\u011bla poc\u00edtit pokles v\u00fdkonu. Kompletn\u00ed zabr\u00e1n\u011bn\u00ed t\u00e9to hrozb\u011b v\u0161ak p\u0159edpokl\u00e1d\u00e1 vypnut\u00ed Hyper-Threading, co\u017e m\u016f\u017ee sn\u00ed\u017eit v\u00fdkon a\u017e o 40 %. Z\u00e1platy pro opera\u010dn\u00ed syst\u00e9my Sierra a High Sierra budou tak\u00e9 vyd\u00e1ny. V\u00fdrobky iPhone, iPad a Watch se t\u011bchto zranitelnost\u00ed net\u00fdkaj\u00ed.<\/p>\n

Spole\u010dnost Google p\u0159ipravuje opravy pro Android a bude aktualizovat Chrome. Je t\u0159eba \u0159\u00edci, \u017ee Android je t\u0159eba chr\u00e1nit p\u0159ed zranitelnostmi MDS pouze na x86-kompatibiln\u00edch platform\u00e1ch (za to pat\u0159\u00ed speci\u00e1ln\u00ed pod\u011bkov\u00e1n\u00ed Intelu za procesory Atom). Opravy pro smartphony a tablety na platform\u00e1ch Intel by m\u011bly vydat v\u00fdrobci za\u0159\u00edzen\u00ed a Google je ji\u017e p\u0159ipravena rozeslat pot\u0159ebn\u00fd opraven\u00fd k\u00f3d. Chromebooks (Chrome OS) ji\u017e jsou chr\u00e1n\u011bny<\/a><\/noindex> z\u00e1platami pro nov\u00e9 zranitelnosti, a v budoucnu bude samotn\u00fd opera\u010dn\u00ed syst\u00e9m opraven. Mezit\u00edm Google vyz\u00fdv\u00e1 u\u017eivatele, aby se ujistili, \u017ee v\u00fdrobci za\u0159\u00edzen\u00ed vydali pot\u0159ebn\u00e9 z\u00e1platy a (nebo) tyto z\u00e1platy poskytli spole\u010dnosti Microsoft a Apple jako v\u00fdvoj\u00e1\u0159i opera\u010dn\u00edch syst\u00e9m\u016f. Pro cloudov\u00e9 platformy a datov\u00e1 centra ji\u017e spole\u010dnost Google distribuovala<\/a><\/noindex> z\u00e1platy k ochran\u011b serverov\u00fdch procesor\u016f p\u0159ed MDS.<\/p>\n

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

V\u00fdvoj\u00e1\u0159 prohl\u00ed\u017ee\u010de Firefox, spole\u010dnost Mozilla, p\u0159edstav\u00ed upraven\u00e9 verze aplikace 21. kv\u011btna. To budou verze Firefox 67 a Extended Support Release verze 60.7. Prohl\u00ed\u017ee\u010de Firefox Beta a Firefox Nightly ji\u017e obsahuj\u00ed pot\u0159ebn\u00e9 opravy k ochran\u011b p\u0159ed novou zranitelnost\u00ed.<\/p>\n

\"Nov\u00e1<\/p>\n

Spole\u010dnost Microsoft tak\u00e9 vydala z\u00e1platy pro opera\u010dn\u00ed syst\u00e9my a cloudov\u00e9 platformy. P\u0159esto v\u0161ak spole\u010dnost doporu\u010duje z\u00edskat opraven\u00fd mikrok\u00f3d od v\u00fdrobc\u016f za\u0159\u00edzen\u00ed, i kdy\u017e tak\u00e9 vytvo\u0159ila str\u00e1nku<\/a><\/noindex> pro samostatn\u00e9 sta\u017een\u00ed oprav. Oprava byla tak\u00e9 zahrnuta v bal\u00ed\u010dku automatick\u00fdch aktualizac\u00ed prost\u0159ednictv\u00edm slu\u017eby Windows Update a bude distribuov\u00e1na od \u010dtvrtka. Slu\u017eba Microsoft Azure je ji\u017e chr\u00e1n\u011bna p\u0159ed nov\u00fdmi zranitelnostmi. Cloudov\u00e1 slu\u017eba Amazon AWS je tak\u00e9 opraven\u00e1.<\/a><\/noindex>.<\/p>\n

Nakonec byly vyd\u00e1ny z\u00e1platy pro opera\u010dn\u00ed syst\u00e9my na Linuxu, jako jsou Red Hat<\/a><\/noindex> a Ubuntu<\/a><\/noindex>. Pokra\u010dov\u00e1n\u00ed n\u00e1sleduje.<\/p>\n

<\/p>\n

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Zdroj: 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\udd47Nov\u00e1 t\u0159\u00edda zranitelnost\u00ed procesor\u016f Intel riskuje poh\u0159b\u00edt Hyper-Threading: byly vyd\u00e1ny z\u00e1platy-vyp\u00edna\u010de | ProHoster","description":"Mohlo by se zd\u00e1t, \u017ee po zranitelnostech Meltdown a Spectre, kter\u00e9 byly objeveny p\u0159ed v\u00edce ne\u017e rokem, ji\u017e nelze fanou\u0161ky a u\u017eivatele procesor\u016f Intel ni\u010d\u00edm vyd\u011bsit. P\u0159esto n\u00e1s spole\u010dnosti op\u011bt dok\u00e1zaly p\u0159ekvapit.","canonical_url":"https:\/\/prohoster.info\/cs\/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":"cs_CZ","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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\u0443\u0434\u0438\u0432\u0438\u0442\u044c.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T18:54:17+00:00","article:modified_time":"2019-10-31T18:54:17+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"33706","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-21 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