{"id":100281,"date":"2021-05-26T04:22:47","date_gmt":"2021-05-26T02:22:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/novaya-tehnika-ataki-rowhammer-na-dram-pamyat"},"modified":"2021-05-26T04:22:47","modified_gmt":"2021-05-26T02:22:48","slug":"novaya-tehnika-ataki-rowhammer-na-dram-pamyat","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/novaya-tehnika-ataki-rowhammer-na-dram-pamyat","title":{"rendered":"Uus RowHammeri r\u00fcnnetehnika DRAM-m\u00e4lule","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google tutvustas «Half-Double», uut RowHammer klassi r\u00fcnnete tehnikat, mis v\u00f5imaldab muuta d\u00fcnaamilise m\u00e4lu (DRAM) \u00fcksikute bittide sisu. R\u00fcnne realiseerub m\u00f5nedes kaasaegsetes DRAM-kiipides, mille tootjad on saavutanud rakke geomeetria v\u00e4hendamise. <\/p>\n

Meeldetuletuseks, et RowHammer r\u00fcnnakud v\u00f5imaldavad moonutada teatud bitiv\u00e4\u00e4rtusi m\u00e4last, viies l\u00e4bi andmete ts\u00fcklilist lugemist naaberrakkudest. DRAM m\u00e4lu on kahe m\u00f5\u00f5tmega rakkude ruudustik, millest iga\u00fches on kondensaator ja transistor. Kui pidevalt lugeda sama m\u00e4lupiirkonda, p\u00f5hjustab see pingefluktuaatsioone ja anomaaliaid, mis kahjustavad naaberrakkude laengut. Kui lugemise intensiivsus on piisavalt suur, v\u00f5ib naaberrakud kaotada piisavalt palju laengut ning j\u00e4rgmine regeneratsioonits\u00fckkel ei suuda taastada nende algset olekut, muutes seel\u00e4bi salvestatud andmete v\u00e4\u00e4rtusi. <\/p>\n

RowHammer'i kaitseks on kiibitootjad rakendanud TRR (Target Row Refresh) mehhanismi, mis kaitseb naaberridade rakke moonutuste eest. Half-Double meetod v\u00f5imaldab selle kaitse ringida, manipuleerides sellega, et moonutused ei piirdu naaberridadega, vaid levivad ka teistesse m\u00e4luridadele, kuigi v\u00e4hemal m\u00e4\u00e4ral. Google'i insenerid n\u00e4itasid, et j\u00e4rjestikuste m\u00e4luridade «A», «B» ja «C» puhul, on v\u00f5imalik r\u00fcnnata rida «C» v\u00e4ga intensiivse ligip\u00e4\u00e4suga reale «A» ja v\u00e4hese aktiivsusega, mis h\u00f5lmab rida «B». Rida «B» r\u00fcnnaku k\u00e4igus aktiveerib mitte-lineaarse laengu leke ja v\u00f5imaldab kasutada rida «B» Rowhammer'i efekti edastamiseks reaalist «A» reale «C».

\"Uus<\/center> <\/p>\n

Erinevalt TRRespass r\u00fcnnakust, mis manipuleerib erinevates rakendustes rakendatud kaitsmehanismide puudustega, tugineb Half-Double r\u00fcnnak f\u00fc\u00fcsikalistele omadustele. Half-Double n\u00e4itab, et Rowhammeri efekti tekitavad omadused on otseselt seotud vahemaa, mitte rakkude vahetu kontaktiga. Kaasaegsete kiipide rakkude v\u00e4henenud geomeetria suurendab moonutuste m\u00f5ju raadiust. Pole v\u00e4listatud, et efekti v\u00f5ib t\u00e4heldada kaugusel \u00fcle kahe rea. <\/p>\n

Toodud on v\u00e4lja mitmeid ettepanekuid, milles anal\u00fc\u00fcsitakse v\u00f5imalikke teid sarnaste r\u00fcnnakute blokeerimiseks, koost\u00f6\u00f6s organisatsiooniga JEDEC. Tehnika kohta on teave avalikustatud, kuna Google arvab, et l\u00e4bi viidud uuring laiendab m\u00e4rkimisv\u00e4\u00e4rselt arusaama Rowhammeri fenomenist ja r\u00f5hutab uurijate, kiibitootjate ja teiste valdkonna huvigruppide koost\u00f6\u00f6 t\u00e4htsust t\u00e4iusliku ja pikaajalise lahenduse arendamisel.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 «Half-Double», \u043d\u043e\u0432\u0443\u044e \u0442\u0435\u0445\u043d\u0438\u043a\u0443 \u0430\u0442\u0430\u043a \u043a\u043b\u0430\u0441\u0441\u0430 RowHammer, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0431\u0438\u0442\u043e\u0432 \u0434\u0438\u043d\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 (DRAM). \u0410\u0442\u0430\u043a\u0430 \u0432\u043e\u0441\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u043d\u0430 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0447\u0438\u043f\u0430\u0445 DRAM, \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0434\u043e\u0431\u0438\u043b\u0438\u0441\u044c \u0443\u043c\u0435\u043d\u044c\u0448\u0435\u043d\u0438\u044f \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0438 \u044f\u0447\u0435\u0435\u043a. \u041d\u0430\u043f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u0430\u0442\u0430\u043a\u0438 \u043a\u043b\u0430\u0441\u0441\u0430 RowHammer \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0438\u0441\u043a\u0430\u0437\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0431\u0438\u0442\u043e\u0432 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0443\u0442\u0451\u043c \u0446\u0438\u043a\u043b\u0438\u0447\u043d\u043e\u0433\u043e \u0447\u0442\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u0441\u043e\u0441\u0435\u0434\u043d\u0438\u0445 \u044f\u0447\u0435\u0435\u043a \u043f\u0430\u043c\u044f\u0442\u0438. \u0422\u0430\u043a \u043a\u0430\u043a \u043f\u0430\u043c\u044f\u0442\u044c DRAM \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":100282,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-100281","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\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\udd47Uus RowHammer r\u00fcnnakutehnika DRAM m\u00e4lule | ProHoster","description":"Google esitles \"Half-Double\", uue RowHammer klassi r\u00fcnnetehnika, mis v\u00f5imaldab muuta d\u00fcnaamilise p\u00f6\u00f6rduskeskm\u00e4lu (DRAM) \u00fcksikute bittide sisu.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/news\/novaya-tehnika-ataki-rowhammer-na-dram-pamyat","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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\u0430\u044f \u0442\u0435\u0445\u043d\u0438\u043a\u0430 \u0430\u0442\u0430\u043a\u0438 RowHammer \u043d\u0430 DRAM-\u043f\u0430\u043c\u044f\u0442\u044c | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 "Half-Double", \u043d\u043e\u0432\u0443\u044e \u0442\u0435\u0445\u043d\u0438\u043a\u0443 \u0430\u0442\u0430\u043a \u043a\u043b\u0430\u0441\u0441\u0430 RowHammer, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0431\u0438\u0442\u043e\u0432 \u0434\u0438\u043d\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 (DRAM).","og:url":"https:\/\/prohoster.info\/et\/blog\/news\/novaya-tehnika-ataki-rowhammer-na-dram-pamyat","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":"2021-05-26T02:22:48+00:00","article:modified_time":"2021-05-26T02:22:48+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"100281","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":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-05-26 02:32:56","updated":"2022-09-30 15:38:37","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/100281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/comments?post=100281"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/100281\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/media\/100282"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/media?parent=100281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/categories?post=100281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/tags?post=100281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}