{"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\/pl\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","title":{"rendered":"FlippyRAM \u2014 dystrybucja do testowania atak\u00f3w Rowhammer","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Na konferencji 38C3 zaprezentowano framework FlippyRAM, przeznaczony do wykrywania luk, kt\u00f3re pozwalaj\u0105 na ataki typu Rowhammer w celu modyfikacji zawarto\u015bci pami\u0119ci operacyjnej. Kod narz\u0119dzia napisany jest w C++ i dystrybuowany na licencji MIT. Aby u\u0142atwi\u0107 testowanie, stworzono gotowy live-dystrybucyjny obraz (1 GB), kt\u00f3ry umo\u017cliwia przeprowadzenie test\u00f3w po uruchomieniu z USB Flash, a tak\u017ce obraz kontenera dla Dockera. <\/p>\n

Celem projektu jest zach\u0119cenie u\u017cytkownik\u00f3w do udzia\u0142u w badaniach, maj\u0105cych na celu zebranie statystyk na temat tego, jak powszechnie luki typu Rowhammer wyst\u0119puj\u0105 w systemach codziennego u\u017cytku. Dane o wynikach test\u00f3w mog\u0105 by\u0107 przesy\u0142ane zar\u00f3wno z uruchomionego dystrybucji, jak i r\u0119cznie dodawane na stron\u0119 bada\u0144. <\/p>\n

Metoda ataku Rowhammer zosta\u0142a zaproponowana 10 lat temu, po czym mi\u0119dzy badaczami bezpiecze\u0144stwa a producentami sprz\u0119tu rozpocz\u0119\u0142a si\u0119 gra w 'kotka i myszk\u0119' \u2014 producenci uk\u0142ad\u00f3w pami\u0119ci starali si\u0119 zablokowa\u0107 luk\u0119, a badacze znajdowali nowe sposoby jej obej\u015bcia. Opr\u00f3cz uk\u0142ad\u00f3w DDR3 na systemach Intel x86, zidentyfikowano metody ataku na uk\u0142ady DDR4 i DDR5, systemy z procesorami AMD i ARM, warianty omijaj\u0105ce korekcj\u0119 b\u0142\u0119d\u00f3w ECC, sposoby przeprowadzania ataku przez sie\u0107 oraz poprzez wykonywanie kodu JavaScript w przegl\u0105darkach. <\/p>\n

Atak RowHammer pozwala na zniekszta\u0142cenie zawarto\u015bci poszczeg\u00f3lnych bit\u00f3w pami\u0119ci DRAM poprzez cykliczne odczytywanie danych z s\u0105siednich kom\u00f3rek pami\u0119ci. Poniewa\u017c pami\u0119\u0107 DRAM jest dwuwymiarow\u0105 macierz\u0105 kom\u00f3rek, z kt\u00f3rych ka\u017cda sk\u0142ada si\u0119 z kondensatora i tranzystora, wykonywanie nieprzerwanego odczytu z tego samego obszaru pami\u0119ci prowadzi do fluktuacji napi\u0119cia i anomalii, powoduj\u0105cych niewielk\u0105 utrat\u0119 \u0142adunku w s\u0105siednich kom\u00f3rkach. Je\u015bli intensywno\u015b\u0107 odczytu jest du\u017ca, s\u0105siednia kom\u00f3rka mo\u017ce straci\u0107 wystarczaj\u0105co du\u017c\u0105 ilo\u015b\u0107 \u0142adunku, a kolejny cykl regeneracji nie zd\u0105\u017cy przywr\u00f3ci\u0107 jej pierwotnego stanu, co prowadzi do zmiany warto\u015bci danych przechowywanych w tej kom\u00f3rce. Aby chroni\u0107 przed RowHammer, producenci chip\u00f3w dodali mechanizm TRR (Target Row Refresh), kt\u00f3ry blokuje zniekszta\u0142cenia kom\u00f3rek w szczeg\u00f3lnych przypadkach, ale nie chroni przed wszystkimi mo\u017cliwymi wariantami ataku.
\n
\u0179r\u00f3d\u0142o: 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\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 dystrybucja do testowania ataku Rowhammer | ProHoster","description":"Na konferencji 38C3 zaprezentowano framework FlippyRAM, stworzony do wykrywania podatno\u015bci umo\u017cliwiaj\u0105cych przeprowadzanie atak\u00f3w klasy Rowhammer w celu zmiany zawarto\u015bci pami\u0119ci operacyjnej.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","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 | 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