{"id":121204,"date":"2025-01-02T09:46:09","date_gmt":"2025-01-02T07:46:09","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer"},"modified":"2025-01-02T09:46:09","modified_gmt":"2025-01-02T07:46:09","slug":"flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","title":{"rendered":"FlippyRAM \u2014 distribuce pro testov\u00e1n\u00ed \u00fatoku Rowhammer.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Na konferenci 38C3 byl p\u0159edstaven r\u00e1mec FlippyRAM, ur\u010den\u00fd k testov\u00e1n\u00ed zranitelnost\u00ed, kter\u00e9 umo\u017e\u0148uj\u00ed \u00fatoky typu Rowhammer pro zm\u011bnu obsahu opera\u010dn\u00ed pam\u011bti. K\u00f3d n\u00e1stroje je naps\u00e1n v C++ a je distribuov\u00e1n pod licenc\u00ed MIT. Pro usnadn\u011bn\u00ed testov\u00e1n\u00ed byl vytvo\u0159en hotov\u00fd live-a distribu\u010dn\u00fd obraz (1 GB), kter\u00fd umo\u017e\u0148uje prov\u00e9st testov\u00e1n\u00ed p\u0159i bootov\u00e1n\u00ed z USB Flash, stejn\u011b jako obraz kontejneru pro Docker. <\/p>\n

C\u00edlem projektu je p\u0159it\u00e1hnout u\u017eivatele k \u00fa\u010dasti na v\u00fdzkumu, kter\u00fd se sna\u017e\u00ed shrom\u00e1\u017edit statistiky o tom, jak se zranitelnosti typu Rowhammer projevuj\u00ed v b\u011b\u017en\u00fdch syst\u00e9mech. \u00dadaje o v\u00fdsledc\u00edch testov\u00e1n\u00ed lze odeslat jak z bootovac\u00ed distribuce, tak ru\u010dn\u011b p\u0159idat na web v\u00fdzkumu. <\/p>\n

\u00datok metodou Rowhammer byl navr\u017een p\u0159ed 10 lety, po \u010dem\u017e za\u010dala mezi bezpe\u010dnostn\u00edmi v\u00fdzkumn\u00edky a v\u00fdrobci hardware hra na \u201ako\u010dku a my\u0161\u2018 \u2014 v\u00fdrobci pam\u011b\u0165ov\u00fdch \u010dip\u016f se sna\u017eili zablokovat zranitelnost, zat\u00edmco v\u00fdzkumn\u00edci nach\u00e1zeli nov\u00e9 zp\u016fsoby, jak ji obej\u00edt. Krom\u011b DDR3 \u010dip\u016f na syst\u00e9mech Intel x86 byly identifikov\u00e1ny metody \u00fatok\u016f na DDR4 a DDR5 \u010dipy, syst\u00e9my s procesory AMD a ARM, varianty obch\u00e1zen\u00ed opravy chyb ECC, zp\u016fsoby prov\u00e1d\u011bn\u00ed \u00fatok\u016f p\u0159es s\u00ed\u0165 a pomoc\u00ed vykon\u00e1v\u00e1n\u00ed JavaScriptov\u00e9ho k\u00f3du v prohl\u00ed\u017ee\u010di. <\/p>\n

\u00datok RowHammer umo\u017e\u0148uje zkreslit obsah jednotliv\u00fdch bit\u016f pam\u011bti DRAM prost\u0159ednictv\u00edm cyklick\u00e9ho \u010dten\u00ed dat ze sousedn\u00edch pam\u011b\u0165ov\u00fdch bun\u011bk. Proto\u017ee pam\u011b\u0165 DRAM p\u0159edstavuje dvourozm\u011brn\u00e9 pole bun\u011bk, z nich\u017e ka\u017ed\u00e1 se skl\u00e1d\u00e1 z kondenz\u00e1toru a tranzistoru, prov\u00e1d\u011bn\u00ed neust\u00e1l\u00e9ho \u010dten\u00ed jedn\u00e9 a t\u00e9\u017ee oblasti pam\u011bti vede k fluktuaci nap\u011bt\u00ed a anom\u00e1li\u00edm, kter\u00e9 zp\u016fsobuj\u00ed mal\u00e9 ztr\u00e1ty n\u00e1boje sousedn\u00edch bun\u011bk. Pokud je intenzita \u010dten\u00ed vysok\u00e1, m\u016f\u017ee sousedn\u00ed bu\u0148ka ztratit dostate\u010dn\u00e9 mno\u017estv\u00ed n\u00e1boje a n\u00e1sleduj\u00edc\u00ed cyklus regenerace nemus\u00ed stihnout obnovit jej\u00ed p\u016fvodn\u00ed stav, co\u017e povede ke zm\u011bn\u011b hodnoty ulo\u017een\u00fdch dat v bu\u0148ce. Pro ochranu p\u0159ed RowHammer v\u00fdrobci \u010dip\u016f p\u0159idali mechanismus TRR (Target Row Refresh), kter\u00fd v ur\u010dit\u00fdch p\u0159\u00edpadech blokuje zkreslen\u00ed bun\u011bk, ale nechr\u00e1n\u00ed p\u0159ed v\u0161emi mo\u017en\u00fdmi variantami \u00fatoku.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 38C3 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a FlippyRAM, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0441\u043e\u0432\u0435\u0440\u0448\u0438\u0442\u044c \u0430\u0442\u0430\u043a\u0438 \u043a\u043b\u0430\u0441\u0441\u0430 Rowhammer \u0434\u043b\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438. \u041a\u043e\u0434 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u0421++ \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 MIT. \u0414\u043b\u044f \u0443\u043f\u0440\u043e\u0449\u0435\u043d\u0438\u044f \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d \u0433\u043e\u0442\u043e\u0432\u044b\u0439 live-\u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432 (1 \u0413\u0411), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u043f\u0440\u043e\u0432\u0435\u0441\u0442\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443, \u0437\u0430\u0433\u0440\u0443\u0437\u0438\u0432\u0448\u0438\u0441\u044c \u0441 USB Flash, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043e\u0431\u0440\u0430\u0437 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u0430 \u0434\u043b\u044f Docker. \u0426\u0435\u043b\u044c\u044e \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-121204","post","type-post","status-publish","format-standard","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\udd47FlippyRAM \u2014 distribuce pro testov\u00e1n\u00ed \u00fatoku Rowhammer | ProHoster","description":"Na konferenci 38C3 byl p\u0159edstaven r\u00e1mec FlippyRAM, ur\u010den\u00fd k testov\u00e1n\u00ed zranitelnost\u00ed, kter\u00e9 umo\u017e\u0148uj\u00ed \u00fatoky typu Rowhammer pro zm\u011bnu obsahu opera\u010dn\u00ed pam\u011bti.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","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\udd47FlippyRAM \u2014 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432 \u0434\u043b\u044f \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 Rowhammer | ProHoster","og:description":"\u041d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 38C3 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a FlippyRAM, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0441\u043e\u0432\u0435\u0440\u0448\u0438\u0442\u044c \u0430\u0442\u0430\u043a\u0438 \u043a\u043b\u0430\u0441\u0441\u0430 Rowhammer \u0434\u043b\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","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":"2025-01-02T07:46:09+00:00","article:modified_time":"2025-01-02T07:46:09+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"121204","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":"default","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":"2026-01-23 09:21:20","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2026-01-23 09:21:20","updated":"2026-01-23 09:21:20","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/121204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=121204"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/121204\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=121204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=121204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=121204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}