{"id":119185,"date":"2024-08-08T09:43:01","date_gmt":"2024-08-08T07:43:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-ghostwrite-predostavlyayushhaya-polnyj-dostup-k-fizicheskoj-pamyati-na-cpu-risc-v-xuantie"},"modified":"2024-08-08T09:43:01","modified_gmt":"2024-08-08T07:43:01","slug":"uyazvimost-ghostwrite-predostavlyayushhaya-polnyj-dostup-k-fizicheskoj-pamyati-na-cpu-risc-v-xuantie","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/uyazvimost-ghostwrite-predostavlyayushhaya-polnyj-dostup-k-fizicheskoj-pamyati-na-cpu-risc-v-xuantie","title":{"rendered":"Vulnerabiliteti GhostWrite, q\u00eb ofron akses t\u00eb plot\u00eb n\u00eb kujtes\u00ebn fizike n\u00eb CPU RISC-V XuanTie","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>K\u00ebrkuesit e Qendr\u00ebs Helmholtz p\u00ebr Sigurin\u00eb e Informacionit (CISPA) publikuan rezultatet e nj\u00eb studimi mbi sigurin\u00eb e procesor\u00ebve t\u00eb bazuar n\u00eb arkitektur\u00ebn RISC-V dhe zbuluan t\u00eb dh\u00ebna mbi nj\u00eb vulnerabilitet me emrin kodues GhostWrite. Vulnerabiliteti prek procesor\u00ebt RISC-V XuanTie C910, t\u00eb prodhuar nga kompania kineze T-Head (n\u00ebnshtrati Alibaba) dhe q\u00eb zhvillohen n\u00eb form\u00ebn e projekteve t\u00eb hapura. Ky vulnerabilitet i lejon nj\u00eb sulmuesi me qasje t\u00eb kufizuar dhe t\u00eb papranueshme n\u00eb sistem t\u00eb arrij\u00eb t\u00eb lexoj\u00eb dhe shkruaj\u00eb n\u00eb \u00e7do hap\u00ebsir\u00eb fiziologjike t\u00eb memories, si dhe t\u00eb aksesoj\u00eb menaxhimin e pajisjeve periferike, si kartat rrjet\u00eb q\u00eb p\u00ebrdorin MMIO (Memory-Mapped Input\/Output).      <\/p>\n<p>Vulnerabiliteti shkaktohet nga mang\u00ebsit\u00eb n\u00eb arkitektur\u00ebn e procesorit, t\u00eb lidhura me izolimin e instruktimeve t\u00eb shtuara nga prodhuesi, t\u00eb cilat zgjasin arkitektur\u00ebn e setit t\u00eb komandave RISC-V dhe lejojn\u00eb qasje t\u00eb drejtp\u00ebrdrejt\u00eb n\u00eb DRAM, duke shmangur mekanizmat e memories virtuale. Punimi i disa instruktimeve t\u00eb zgjeruara drejtp\u00ebrdrejt me memorien fizike n\u00eb vend t\u00eb memories virtuale krijon mund\u00ebsin\u00eb p\u00ebr t\u00eb anashkaluar izolimin e memories midis proceseve.        <\/p>\n<p>Pajisja e p\u00ebrgatitur p\u00ebr t\u00eb kryer nj\u00eb sulm \u00ebsht\u00eb 100% e riprodhueshme dhe k\u00ebrkon ekzekutimin e kodit t\u00eb vet brenda disa mikrosekondash. Metodat softuerike t\u00eb izolimit, t\u00eb tilla si kontejner\u00ebt dhe ambientet sandbox, nuk pengojn\u00eb shfryt\u00ebzimin e dob\u00ebsis\u00eb. P\u00ebr t\u00eb bllokuar dob\u00ebsin\u00eb ndihmon vet\u00ebm \u00e7aktivizimi i plot\u00eb i mb\u00ebshtetjes s\u00eb zgjerimeve vektoriale, i cili rezulton n\u00eb nj\u00eb ulje t\u00eb performanc\u00ebs n\u00eb testet rvv-bench me 33% (n\u00eb sh\u00ebnimin e raportit \u00ebsht\u00eb e sh\u00ebnuar 77%, nd\u00ebrsa n\u00eb faqen p\u00ebrmbledh\u00ebse \u2014 33%, kurse n\u00eb detaje p\u00ebrmendet nj\u00eb ulje e performanc\u00ebs memcpy me 33% dhe memset me 8%), si dhe ndalon p\u00ebraf\u00ebrsisht dyfishin e grupit t\u00eb instruktimeve procesorike t\u00eb disponueshme p\u00ebr aplikacionet.       <\/p>\n<p>CPU XuanTie C910 jan\u00eb disa nga \u00e7ipat m\u00eb me performanc\u00eb RISC-V q\u00eb ekzistojn\u00eb n\u00eb treg dhe jan\u00eb tashm\u00eb aktivisht t\u00eb p\u00ebrdorur n\u00eb <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sq\/server\/dts-gdansk\/\"   title=\"server\u00eb\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4560\">server\u00eb<\/a> sistemet e cloud dhe laptop\u00ebt. P\u00ebr shembull, problemi shfaqet n\u00eb serverat Scaleway Elastic Metal RV1, klaster\u00ebt Lichee Cluster 4A, laptopin Lichee Book 4A, konsol\u00ebn e loj\u00ebrave Lichee Console 4A, kompjuterin portativ Lichee Pocket 4A, kompjuter\u00ebt me nj\u00eb pllak\u00eb Sipeed Lichee Pi 4A, Milk-V Meles dhe BeagleV-Ahead.            <\/p>\n<p>Si nj\u00eb shembull, studiuesit kan\u00eb p\u00ebrgatitur nj\u00eb exploiti q\u00eb lejon nj\u00eb p\u00ebrdorues jo t\u00eb privilegjuar t\u00eb fitoj\u00eb t\u00eb drejtat root n\u00eb Linux. Exploiti ndryshon p\u00ebrmbajtjen e tabel\u00ebs s\u00eb faqeve n\u00eb memorie, e cila p\u00ebrdoret p\u00ebr t\u00eb p\u00ebrkthyer adresat virtuale n\u00eb adresat fizik\u00eb, p\u00ebr t\u00eb marr\u00eb adresat virtuale t\u00eb lidhura me \u00e7do adres\u00eb fizike. Po ashtu, \u00ebsht\u00eb p\u00ebrgatitur nj\u00eb shembull exploiti p\u00ebr t\u00eb lexuar p\u00ebrmbajtjen e memories s\u00eb b\u00ebrtham\u00ebs dhe proceseve t\u00eb tjera, \u00e7ka lejon nxjerrjen e \u00e7el\u00ebsave t\u00eb enkriptimit dhe fjal\u00ebkalimeve t\u00eb ruajtura n\u00eb memorie.          <center>  <video  controls=\"\" style=\"width: 700px; height: 400px; max-width:100%\"><source src=\"https:\/\/ghostwriteattack.com\/kernel-getuid-sudo-attack.mp4\" type=\"video\/mp4\"><\/video>  <\/center>        <\/p>\n<p>Shtes\u00eb, hulumtuesit zbuluan dy dob\u00ebsi arkitekturore m\u00eb pak t\u00eb rrezikshme \u2014 nj\u00eb q\u00eb prek procesor\u00ebt T-Head XuanTie C906, dhe tjetra T-Head XuanTie C908. T\u00eb dyja dob\u00ebsit\u00eb jan\u00eb t\u00eb kufizuara n\u00eb nj\u00eb thirrje p\u00ebr ndalimin e sh\u00ebrbimit p\u00ebr shkak t\u00eb ndalimit t\u00eb pun\u00ebs s\u00eb CPU-s\u00eb. Dob\u00ebsit\u00eb mund t\u00eb paraqesin rrezik p\u00ebr platformat cloud t\u00eb nd\u00ebrtuara mbi \u00e7ipet T-Head XuanTie, pasi me akses n\u00eb ekzekutimin e kodit n\u00eb ambientin cloud, ka mund\u00ebsin\u00eb t\u00eb ndaloj\u00eb pun\u00ebn e p\u00ebrdoruesve t\u00eb tjer\u00eb q\u00eb sh\u00ebrbehen n\u00eb t\u00eb nj\u00ebjt\u00ebn. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sq\/server\/dts-newyork\/\"   title=\"serveri\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2777\">serveri<\/a>.      <\/p>\n<p>Problemet u identifikuan me ndihm\u00ebn e korniz\u00ebs RISCVuzz, e krijuar p\u00ebr testimin fuzzing t\u00eb CPU. Korniza identifikon ndryshimet n\u00eb zbatimin e t\u00eb nj\u00ebjtave instruksione t\u00eb zgjeruara n\u00eb CPU t\u00eb ndryshme, sipas supozimit se p\u00ebr shkak t\u00eb munges\u00ebs s\u00eb nj\u00eb regjistri t\u00eb p\u00ebrbashk\u00ebt p\u00ebr zgjerimet e setit t\u00eb komandave RISC-V, instruksionet e koduara nj\u00ebsoj n\u00eb \u00e7ipa t\u00eb prodhuesve t\u00eb ndrysh\u00ebm mund t\u00eb \u00e7ojn\u00eb n\u00eb kryerjen e veprimeve t\u00eb ndryshme. Kontrolli p\u00ebrfshinte krahasimin e sjelljes gjat\u00eb p\u00ebrpunimit t\u00eb instruksioneve t\u00eb procesor\u00ebve n\u00eb CPU t\u00eb ndryshme RISC-V dhe analizimin e mund\u00ebsive t\u00eb dob\u00ebsive n\u00eb situatat ku u v\u00ebrejt nj\u00eb shkuror\u00ebzim i sjelljes.<br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61671\">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 \u0426\u0435\u043d\u0442\u0440\u0430 \u0413\u0435\u043b\u044c\u043c\u0433\u043e\u043b\u044c\u0446\u0430 \u043f\u043e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (CISPA) \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b RISC-V \u0438 \u0440\u0430\u0441\u043a\u0440\u044b\u043b\u0438 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0435\u0439 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f GhostWrite. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 RISC-V-\u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b XuanTie C910, \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u043c\u044b\u0435 \u043a\u0438\u0442\u0430\u0439\u0441\u043a\u043e\u0439 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 T-Head (\u043f\u043e\u0434\u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u0438\u0435 Alibaba) \u0438 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u044b\u0435 \u0432 \u0444\u043e\u0440\u043c\u0435 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443, \u0438\u043c\u0435\u044e\u0449\u0435\u043c\u0443 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0447\u0442\u0435\u043d\u0438\u044f \u0438 [&hellip;]<\/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-119185","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0426\u0435\u043d\u0442\u0440\u0430 \u0413\u0435\u043b\u044c\u043c\u0433\u043e\u043b\u044c\u0446\u0430 \u043f\u043e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (CISPA) 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