{"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\/lv\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","title":{"rendered":"FlippyRAM \u2014 izplat\u012b\u0161ana Rowhammer uzbrukumu test\u0113\u0161anai","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Konferenc\u0113 38C3 tika prezent\u0113ts FlippyRAM ietvars, kas paredz\u0113ts, lai p\u0101rbaud\u012btu, vai past\u0101v ievainojam\u012bbas, kas \u013cauj veikt Rowhammer uzbrukumus, lai main\u012btu operat\u012bv\u0101s atmi\u0146as saturu. R\u012bku komplekta kods ir rakst\u012bts C++ un tiek izplat\u012bts, pamatojoties uz MIT licenci. Lai vienk\u0101r\u0161otu test\u0113\u0161anu, ir izveidots gatavs live-distro (1 GB), kas \u013cauj veikt p\u0101rbaudi, start\u0113joties no USB Flash, k\u0101 ar\u012b konteineru att\u0113ls Docker lieto\u0161anai. <\/p>\n

Projekta m\u0113r\u0137is ir piesaist\u012bt lietot\u0101jus dal\u012bbai p\u0113t\u012bjum\u0101, kas cen\u0161as sav\u0101kt statistiku par to, cik izplat\u012btas ir Rowhammer klases ievainojam\u012bbas ikdienas lietojam\u0101s sist\u0113m\u0101s. Dati par test\u0113\u0161anas rezult\u0101tiem var tikt nos\u016bt\u012bti gan no palaist\u0101 distro, gan manu\u0101li pievienoti p\u0113t\u012bjuma t\u012bmek\u013ca vietn\u0113. <\/p>\n

Rowhammer uzbrukuma metode tika pied\u0101v\u0101ta pirms 10 gadiem, p\u0113c tam starp dro\u0161\u012bbas p\u0113tniekiem un aparat\u016bras ra\u017eot\u0101jiem s\u0101k\u0101s sp\u0113le \u201eka\u0137i un peles\u201d \u2014 atmi\u0146u mikrosh\u0113mu ra\u017eot\u0101ji cent\u0101s blo\u0137\u0113t ievainojam\u012bbu, bet p\u0113tnieki atrada jaunus veidus, k\u0101 to apiet. Papildus DDR3 mikrosh\u0113m\u0101m Intel x86 sist\u0113m\u0101s tika atkl\u0101ti uzbrukuma veidi ar\u012b DDR4 un DDR5 mikrosh\u0113m\u0101m, AMD un ARM procesoru sist\u0113m\u0101m, iesp\u0113jas apiet ECC k\u013c\u016bdu kori\u0123\u0113\u0161anu, k\u0101 ar\u012b uzbrukuma veik\u0161anas metodes, kas saist\u012btas ar t\u012bklu un JavaScript koda izpildi p\u0101rl\u016bkprogramm\u0101. <\/p>\n

RowHammer uzbrukums \u013cauj izkrop\u013cot atsevi\u0161\u0137u DRAM atmi\u0146as bitu saturu, cikliski nolasot datus no blakus eso\u0161aj\u0101m atmi\u0146as \u0161\u016bn\u0101m. T\u0101 k\u0101 DRAM atmi\u0146a ir divdimensiju \u0161\u016bnu mas\u012bvs, kur katra \u0161\u016bna sast\u0101v no kondensatora un tranzistora, nep\u0101rtraukta vienas un t\u0101s pa\u0161as atmi\u0146as zonas nolas\u012b\u0161ana noved pie sprieguma sv\u0101rst\u012bb\u0101m un anom\u0101lij\u0101m, kas izraisa nelielu blakus eso\u0161o \u0161\u016bnu l\u0101di\u0146a zudumu. Ja nolas\u012b\u0161anas intensit\u0101te ir liela, blakus eso\u0161\u0101 \u0161\u016bna var zaud\u0113t pietiekami daudz l\u0101di\u0146a, un n\u0101kamais regener\u0101cijas cikls nesekm\u0113s atjaunot t\u0101s s\u0101kotn\u0113jo st\u0101vokli, kas nov leads to data modification in the cell. Lai aizsarg\u0101tu no RowHammer, mikrosh\u0113mu ra\u017eot\u0101ji ir pievienoju\u0161i TRR (Target Row Refresh) meh\u0101nismu, kas blo\u0137\u0113 \u0161\u016bnu izkrop\u013cojumus noteiktos gad\u012bjumos, ta\u010du nenodro\u0161ina aizsardz\u012bbu pret visiem iesp\u0113jamiem uzbrukuma veidiem.
\n
Avots: opennet.lv<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\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 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p\u0101rbaud\u012btu, vai ir ievainojam\u012bbas, kas \u013cauj veikt Rowhammer uzbrukumus, mainot operat\u012bv\u0101s atmi\u0146as saturu.","canonical_url":"https:\/\/prohoster.info\/lv\/blog\/news\/flippyram-distributiv-dlya-testirovaniya-ataki-rowhammer","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"lv_LV","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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