{"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\/ro\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","title":{"rendered":"FlippyRAM \u2014 un distribu\u021bie pentru testarea atacului Rowhammer","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

La conferin\u021ba 38C3 a fost prezentat cadrul FlippyRAM, destinat verific\u0103rii existen\u021bei vulnerabilit\u0103\u021bilor care permit atacuri de tip Rowhammer pentru modificarea con\u021binutului memoriei RAM. Codul instrumentului este scris \u00een C++ \u0219i este distribuit sub licen\u021ba MIT. Pentru a simplifica testarea, a fost creat un live-CD (1 GB), care permite efectuarea test\u0103rii, \u00eenc\u0103rc\u00e2ndu-se de pe USB Flash, precum \u0219i o imagine a containerului pentru Docker. <\/p>\n

Scopul proiectului este de a implica utilizatorii \u00een cercetarea care \u00eencearc\u0103 s\u0103 adune statistici despre c\u00e2t de mult se manifest\u0103 vulnerabilit\u0103\u021bile de tip Rowhammer \u00een sistemele de uz general. Datele despre rezultatul test\u0103rii pot fi trimise at\u00e2t din distribu\u021bia \u00eenc\u0103rcat\u0103, c\u00e2t \u0219i ad\u0103ugate manual pe site-ul cercet\u0103rii. <\/p>\n

Metoda de atac Rowhammer a fost propus\u0103 acum 10 ani, dup\u0103 care a \u00eenceput o joac\u0103 de-a \u201episica \u0219i \u0219oarecele\u201d \u00eentre cercet\u0103torii \u00een securitate \u0219i produc\u0103torii de echipamente - produc\u0103torii de cipuri de memorie au \u00eencercat s\u0103 blocheze vulnerabilitatea, iar cercet\u0103torii au g\u0103sit noi modalit\u0103\u021bi de a o ocoli. Pe l\u00e2ng\u0103 cipurile DDR3 pe sistemele Intel x86, au fost identificate metode de atac pe cipurile DDR4 \u0219i DDR5, sisteme cu procesoare AMD \u0219i ARM, variante de ocolire a corec\u021biei erorilor ECC, modalit\u0103\u021bi de a efectua atacuri prin re\u021bea \u0219i prin executarea codului JavaScript \u00een browser. <\/p>\n

Atacul RowHammer permite distorsionarea con\u021binutului unor bi\u021bi individuali din memoria DRAM prin citirea cyclical a datelor din celulele de memorie adiacente. Deoarece memoria DRAM reprezint\u0103 un aranjament bidimensional de celule, fiecare dintre care const\u0103 dintr-un condensator \u0219i un tranzistor, executarea unei citiri continue a acelea\u0219i zone de memorie duce la fluctua\u021bii de tensiune \u0219i anomalii, provoc\u00e2nd o pierdere u\u0219oar\u0103 a \u00eenc\u0103rc\u0103rii celulelor adiacente. Dac\u0103 intensitatea citirii este mare, celula adiacent\u0103 poate pierde o cantitate semnificativ\u0103 de \u00eenc\u0103rcare \u0219i urm\u0103torul ciclu de regenerare nu va reu\u0219i s\u0103 restabileasc\u0103 starea ini\u021bial\u0103, ceea ce va duce la modificarea valorii datelor stocate \u00een celul\u0103. Pentru protec\u021bia \u00eempotriva RowHammer, produc\u0103torii de cipuri au ad\u0103ugat un mecanism TRR (Target Row Refresh), care blocheaz\u0103 distorsionarea celulelor \u00een cazuri specifice, dar nu protejeaz\u0103 \u00eempotriva tuturor posibilit\u0103\u021bilor de atac.
\n
Sursa: opennet.ro<\/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\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 distribu\u021bie pentru testarea atacului Rowhammer | ProHoster","description":"La conferin\u021ba 38C3 a fost prezentat framework-ul FlippyRAM, destinat verific\u0103rii vulnerabilit\u0103\u021bilor care permit atacuri de tip Rowhammer pentru modificarea con\u021binutului memoriei RAM.","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","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 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