{"id":138938,"date":"2025-07-14T11:11:58","date_gmt":"2025-07-14T09:11:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/gpuhammer-variant-ataki-rowhammer-na-pamyat-gpu"},"modified":"2025-07-14T11:11:58","modified_gmt":"2025-07-14T09:11:59","slug":"gpuhammer-variant-ataki-rowhammer-na-pamyat-gpu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/gpuhammer-variant-ataki-rowhammer-na-pamyat-gpu","title":{"rendered":"GPUHammer \u2014 atak Rowhammer na pami\u0119\u0107 GPU","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Naukowcy z Uniwersytetu w Toronto przedstawili pierwszy atak klasy Rowhammer, kt\u00f3ry mo\u017cna zastosowa\u0107 do zniekszta\u0142cenia zawarto\u015bci pami\u0119ci wideo. Mo\u017cliwo\u015b\u0107 przeprowadzenia ataku, prowadz\u0105cego do podmiany do 8 bit\u00f3w danych, zosta\u0142a zademonstrowana na dyskretnym GPU NVIDIA A6000 z pami\u0119ci\u0105 wideo GDDR6. Jako praktyczny przyk\u0142ad pokazano, w jaki spos\u00f3b mo\u017cna wykorzysta\u0107 takie zniekszta\u0142cenie do ingerencji w dzia\u0142anie modeli uczenia maszynowego, co prowadzi do znacznego (z 80% do 0.1%) obni\u017cenia dok\u0142adno\u015bci wynik\u00f3w, gdy zmienia si\u0119 warto\u015b\u0107 zaledwie jednego bitu.     <center><img decoding=\"async\" alt=\"GPUHammer - wariant ataku Rowhammer na pami\u0119\u0107 GPU\" src=\"\/wp-content\/uploads\/2025\/07\/335fc84ff4fcbe5d01f91b5c3084481e.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Do tej pory tworzenie atak\u00f3w klasy Rowhammer na pami\u0119\u0107 wideo by\u0142o utrudnione z powodu trudno\u015bci w okre\u015bleniu fizycznego u\u0142o\u017cenia pami\u0119ci w uk\u0142adach GDDR, du\u017cych op\u00f3\u017anie\u0144 podczas dost\u0119pu do pami\u0119ci (cztery razy wolniejszych) oraz wy\u017cszej cz\u0119stotliwo\u015bci od\u015bwie\u017cania pami\u0119ci. Dodatkowo, utrudnieniem dla bada\u0144 by\u0142o wykorzystanie w uk\u0142adach GDDR w\u0142asno\u015bciowych mechanizm\u00f3w ochrony przed manipulacjami, prowadz\u0105cymi do przedwczesnej utraty \u0142adunku, do analizy kt\u00f3rych wymagano stworzenia specjalnych testowych stanowisk sprz\u0119towych opartych na FPGA.       <\/p>\n<p>Aby zbada\u0107 pami\u0119\u0107 wideo, naukowcy opracowali now\u0105 technik\u0119 in\u017cynierii wstecznej GDDR DRAM, a w samym ataku wykorzystano optymalizacje dost\u0119pu do pami\u0119ci stosowane w organizacji oblicze\u0144 r\u00f3wnoleg\u0142ych, kt\u00f3re by\u0142y u\u017cywane jako wzmacniacze intensywno\u015bci dost\u0119pu do poszczeg\u00f3lnych kom\u00f3rek. Do przeprowadzenia ataku na GPU NVIDIA u\u017cyto niskopoziomowego kodu CUDA.     <\/p>\n<p>W u\u017cytkowym kodzie CUDA nie wykonuje si\u0119 dost\u0119pu do fizycznych adres\u00f3w pami\u0119ci, jednak w sterowniku NVIDIA sprowadzono pami\u0119\u0107 wirtualn\u0105 do tej samej pami\u0119ci fizycznej, z czego skorzystali naukowcy do obliczenia przesuni\u0119cia pami\u0119ci wirtualnej i okre\u015blenia uk\u0142adu bank\u00f3w pami\u0119ci. Rozpoznawanie dost\u0119pu do r\u00f3\u017cnych bank\u00f3w pami\u0119ci przeprowadzono poprzez analiz\u0119 op\u00f3\u017anie\u0144, kt\u00f3re r\u00f3\u017cni\u0142y si\u0119 podczas dost\u0119pu do jednego lub r\u00f3\u017cnych bank\u00f3w pami\u0119ci.      <\/p>\n<p>W systemach wsp\u00f3\u0142dziel\u0105cych GPU, takich jak <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/\"   title=\"serwery\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1982\">serwery<\/a> Aby zrealizowa\u0107 modele uczenia maszynowego, atak pozwala jednemu u\u017cytkownikowi na zmian\u0119 zawarto\u015bci pami\u0119ci wideo z danymi innego u\u017cytkownika. Jako \u015brodek ochrony firma NVIDIA zaleca w\u0142\u0105czenie kod\u00f3w korekcji b\u0142\u0119d\u00f3w (ECC, Error Correction Codes) poleceniem &#171;nvidia-smi -e 1&#187; lub u\u017cycie serii kart graficznych z obs\u0142ug\u0105 OD-ECC (On-Die ECC), takich jak GeForce RTX 50, RTX PRO, GB200, B200, B100, H100, H200, H20 i GH200.    <\/p>\n<p>Wed\u0142ug badaczy w\u0142\u0105czenie ECC w systemach z GPU A6000 prowadzi do spadku wydajno\u015bci w wykonywaniu modeli uczenia maszynowego o oko\u0142o 10% i zmniejszenia obj\u0119to\u015bci pami\u0119ci o 6.25%. Narz\u0119dzie do przeprowadzenia ataku i realizacji in\u017cynierii odwrotnej niskopoziomowego uk\u0142adu pami\u0119ci wideo w systemach z GPU NVIDIA zosta\u0142o opublikowane na GitHub.      <\/p>\n<p>Atak RowHammer pozwala na zniekszta\u0142cenie zawarto\u015bci pojedynczych bit\u00f3w pami\u0119ci DRAM poprzez cykliczne odczytywanie danych z s\u0105siednich kom\u00f3rek pami\u0119ci. Poniewa\u017c pami\u0119\u0107 DRAM ma form\u0119 dwuwymiarowej tablicy kom\u00f3rek, z kt\u00f3rych ka\u017cda sk\u0142ada si\u0119 z kondensatora i tranzystora, wykonywanie ci\u0105g\u0142ego odczytu tej samej cz\u0119\u015bci pami\u0119ci prowadzi do fluktuacji napi\u0119cia i anomalii, kt\u00f3re powoduj\u0105 niewielk\u0105 strat\u0119 \u0142adunku s\u0105siednich kom\u00f3rek. Je\u015bli intensywno\u015b\u0107 odczytu jest wysoka, s\u0105siednia kom\u00f3rka mo\u017ce straci\u0107 wystarczaj\u0105c\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 przechowywanych w tej kom\u00f3rce danych.         <\/p>\n<p>Metoda ataku Rowhammer zosta\u0142a zaproponowana w 2014 roku, po czym mi\u0119dzy badaczami bezpiecze\u0144stwa a producentami sprz\u0119tu rozpocz\u0119\u0142a si\u0119 gra w &#171;kotka i myszk\u0119&#187; &#8212; producenci uk\u0142ad\u00f3w pami\u0119ci pr\u00f3bowali zablokowa\u0107 luk\u0119, a badacze znajdowali nowe sposoby jej obej\u015bcia. Na przyk\u0142ad, aby chroni\u0107 przed RowHammer, producenci uk\u0142ad\u00f3w dodali mechanizm TRR (Target Row Refresh), ale okaza\u0142o si\u0119, \u017ce blokuje on zniekszta\u0142cenie kom\u00f3rek tylko w szczeg\u00f3lnych przypadkach, a nie chroni przed wszystkimi mo\u017cliwymi wariantami ataku. Metody atak\u00f3w zosta\u0142y opracowane dla uk\u0142ad\u00f3w DDR3, DDR4 i DDR5 w systemach z procesorami Intel, AMD i ARM. Znaleziono r\u00f3wnie\u017c sposoby na obej\u015bcie korekcji b\u0142\u0119d\u00f3w ECC i zaproponowano warianty przeprowadzenia ataku przez sie\u0107 oraz poprzez wykonanie kodu JavaScript w przegl\u0105darce.<br \/>\n<br \/>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63575\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u0423\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u0422\u043e\u0440\u043e\u043d\u0442\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0438 \u043f\u0435\u0440\u0432\u0443\u044e \u0430\u0442\u0430\u043a\u0443 \u043a\u043b\u0430\u0441\u0441\u0430 Rowhammer, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u0443\u044e \u0434\u043b\u044f \u0438\u0441\u043a\u0430\u0436\u0435\u043d\u0438\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u0432\u0438\u0434\u0435\u043e\u043f\u0430\u043c\u044f\u0442\u0438. \u0412\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0435 \u0434\u043e 8 \u0431\u0438\u0442 \u0434\u0430\u043d\u043d\u044b\u0445, \u043f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u0434\u0438\u0441\u043a\u0440\u0435\u0442\u043d\u043e\u043c GPU NVIDIA A6000 \u0441 \u0432\u0438\u0434\u0435\u043e\u043f\u0430\u043c\u044f\u0442\u044c\u044e GDDR6. \u0412 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u043f\u0440\u0438\u043c\u0435\u0440\u0430 \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u043e \u043a\u0430\u043a \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0435 \u0438\u0441\u043a\u0430\u0436\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u0432\u043c\u0435\u0448\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0430 \u0432 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043c\u043e\u0434\u0435\u043b\u0435\u0439 \u043c\u0430\u0448\u0438\u043d\u043d\u043e\u0433\u043e \u043e\u0431\u0443\u0447\u0435\u043d\u0438\u044f \u0438 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0433\u043e (\u0441 80% \u0434\u043e [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":138939,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-138938","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u0423\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u0422\u043e\u0440\u043e\u043d\u0442\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0438 \u043f\u0435\u0440\u0432\u0443\u044e \u0430\u0442\u0430\u043a\u0443 \u043a\u043b\u0430\u0441\u0441\u0430 Rowhammer, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u0443\u044e 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