P\u00e5 konferensen 38C3 presenterades ramverket FlippyRAM, avsett f\u00f6r att kontrollera f\u00f6rekomsten av s\u00e5rbarheter som m\u00f6jligg\u00f6r Rowhammer-attacker f\u00f6r att \u00e4ndra inneh\u00e5llet i RAM-minnet. Verktygskoden \u00e4r skriven i C++ och distribueras under MIT-licensen. F\u00f6r att f\u00f6renkla testning har en f\u00e4rdig live-distribution (1 GB) skapats, vilket g\u00f6r det m\u00f6jligt att genomf\u00f6ra tester genom att starta fr\u00e5n USB-flash, samt en Docker-containeravbildning. <\/p>\n
Projektets m\u00e5l \u00e4r att involvera anv\u00e4ndare i en studie som f\u00f6rs\u00f6ker samla statistik om hur Rowhammer-s\u00e5rbarheter yttrar sig i allm\u00e4nt f\u00f6rekommande system. Data fr\u00e5n tester kan skickas antingen fr\u00e5n den laddade distributionen eller manuellt l\u00e4ggas till p\u00e5 studiewebbplatsen. <\/p>\n
\u041c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438 Rowhammer \u0431\u044b\u043b \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d 10 \u043b\u0435\u0442 \u043d\u0430\u0437\u0430\u0434, \u043f\u043e\u0441\u043b\u0435 \u0447\u0435\u0433\u043e \u043c\u0435\u0436\u0434\u0443 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c\u0438 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f\u043c\u0438 \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0430\u0447\u0430\u043b\u0430\u0441\u044c \u0438\u0433\u0440\u0430 \u0432 «\u043a\u043e\u0448\u043a\u0438-\u043c\u044b\u0448\u043a\u0438» — \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0438 \u0447\u0438\u043f\u043e\u0432 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u044b\u0442\u0430\u043b\u0438\u0441\u044c \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043d\u0430\u0445\u043e\u0434\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0435 \u0441\u043f\u043e\u0441\u043e\u0431\u044b \u0435\u0451 \u043e\u0431\u0445\u043e\u0434\u0430. \u041f\u043e\u043c\u0438\u043c\u043e \u0447\u0438\u043f\u043e\u0432 DDR3 \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 Intel x86, \u0431\u044b\u043b\u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u043c\u0435\u0442\u043e\u0434\u044b \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u0447\u0438\u043f\u044b DDR4 \u0438 DDR5, \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0441 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u043c\u0438 AMD \u0438 ARM, \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u044b \u043e\u0431\u0445\u043e\u0434\u0430 \u043a\u043e\u0440\u0440\u0435\u043a\u0446\u0438\u0438 \u043e\u0448\u0438\u0431\u043e\u043a ECC, \u0441\u043f\u043e\u0441\u043e\u0431\u044b \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u043f\u043e \u0441\u0435\u0442\u0438 \u0438 \u0447\u0435\u0440\u0435\u0437 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 JavaScript-\u043a\u043e\u0434\u0430 \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435. <\/p>\n
RowHammer-attacken g\u00f6r det m\u00f6jligt att f\u00f6rvr\u00e4nga inneh\u00e5llet i enskilda DRAM-minnesbitar genom cykliskt l\u00e4sande av data fr\u00e5n angr\u00e4nsande minnesceller. Eftersom DRAM-minnet utg\u00f6rs av en tv\u00e5dimensionell matris av celler, var och en best\u00e5ende av en kondensator och en transistor, leder kontinuerlig l\u00e4sning av samma minnesomr\u00e5de till sp\u00e4nningsfluktuationer och anomalier som orsakar en liten f\u00f6rlust av laddning i angr\u00e4nsande celler. Om l\u00e4sningsintensiteten \u00e4r h\u00f6g kan en angr\u00e4nsande cell f\u00f6rlora tillr\u00e4ckligt med laddning s\u00e5 att den p\u00e5f\u00f6ljande regenereringscykeln inte hinner \u00e5terst\u00e4lla dess ursprungliga tillst\u00e5nd, vilket leder till en f\u00f6r\u00e4ndring av v\u00e4rdet som lagras i cellen. F\u00f6r att skydda mot RowHammer har chipstillverkare lagt till TRR-mekanismen (Target Row Refresh), som blockerar f\u00f6rvr\u00e4ngning av celler i specifika fall, men inte skyddar mot alla m\u00f6jliga attackvarianter. \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 distribuering f\u00f6r test av Rowhammer-attack | ProHoster","description":"P\u00e5 konferensen 38C3 presenterades ramverket FlippyRAM, avsett f\u00f6r att kontrollera f\u00f6rekomsten av s\u00e5rbarheter som m\u00f6jligg\u00f6r Rowhammer-attacker f\u00f6r att \u00e4ndra inneh\u00e5llet i 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\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 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K\u00e4lla: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"