{"id":121973,"date":"2025-02-17T14:22:13","date_gmt":"2025-02-17T12:22:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-cpu-amd-pozvolyayushhie-vypolnit-kod-na-urovne-smm"},"modified":"2025-02-17T14:22:13","modified_gmt":"2025-02-17T12:22:13","slug":"uyazvimosti-v-cpu-amd-pozvolyayushhie-vypolnit-kod-na-urovne-smm","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimosti-v-cpu-amd-pozvolyayushhie-vypolnit-kod-na-urovne-smm","title":{"rendered":"Vulnerabilit\u00e0 nella CPU AMD che permettono l'esecuzione di codice a livello SMM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>La societ\u00e0 AMD ha annunciato di aver risolto sei vulnerabilit\u00e0 nei processori AMD EPYC e AMD Ryzen. Le tre vulnerabilit\u00e0 pi\u00f9 gravi (CVE-2023-31342, CVE-2023-31343, CVE-2023-31345) potrebbero consentire l'esecuzione di codice a livello SMM (System Management Mode), che ha una priorit\u00e0 superiore rispetto a quella della modalit\u00e0 hypervisor e del livello di protezione zero. La compromissione di SMM permette di avere accesso illimitato a tutta la memoria di sistema e pu\u00f2 essere utilizzata per il controllo del sistema operativo. Le vulnerabilit\u00e0 sono causate dalla mancanza di un'adeguata verifica dei dati in ingresso nel gestore SMM, il che consente a un attaccante privilegiato di sovrascrivere il contenuto di SMRAM. I dettagli sulla metodologia dell'attacco non sono stati resi noti.      <\/p>\n<p>Le altre vulnerabilit\u00e0:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-31352 \u2014 errore nel firmware del meccanismo AMD SEV (Secure Encrypted Virtualization), utilizzato nei sistemi di virtualizzazione per la protezione <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/vps\/\"   title=\"macchine virtuali\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2136\">macchine virtuali<\/a> dall'interferenza da parte dell'hypervisor o dell'amministratore del sistema host. Analogamente a una vulnerabilit\u00e0 risolta all'inizio di febbraio, il problema consente all'amministratore con accesso all'ambiente host di leggere il contenuto non crittografato della memoria, in cui potrebbero trovarsi dati sensibili del sistema guest.\n<li class=\"l\"> CVE-2023-20582 \u2014 possibilit\u00e0 di bypassare i controlli RMP (Reverse Map Table) durante l'uso dell'estensione SEV-SNP (Secure Nested Paging), progettata per un funzionamento sicuro con tabelle di pagine di memoria nidificate. Un attaccante con privilegi di amministratore pu\u00f2 creare condizioni che portano a un'eccezione (fault) nel PTE (Page Table Entry) per bypassare i meccanismi di protezione dell'integrit\u00e0 della memoria delle macchine virtuali.\n<li class=\"l\"> CVE-2023-20581 \u2014 errore di controllo degli accessi all'IOMMU, che consente a un attaccante privilegiato di bypassare il controllo RMP e compromettere l'integrit\u00e0 della memoria del sistema guest.  <\/ul>\n<p>Le vulnerabilit\u00e0 si manifestano nelle generazioni 3 e 4 dei processori server AMD EPYC, nelle CPU incorporate delle serie AMD EPYC 7003 e 9004, in AMD Ryzen Embedded R1000, R2000, 5000, 7000, V2000 e V3000, nelle serie desktop AMD Ryzen 3000, 4000, 5000, 7000 e 8000, cos\u00ec come nella serie AMD Athlon 3000.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62734\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f AMD \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438 \u0448\u0435\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u0445 AMD EPYC \u0438 AMD Ryzen. \u0422\u0440\u0438 \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2023-31342, CVE-2023-31343, CVE-2023-31345) \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 SMM (System Management Mode), \u0438\u043c\u0435\u044e\u0449\u0435\u043c \u0431\u043e\u043b\u0435\u0435 \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u043f\u0440\u0438\u043e\u0440\u0438\u0442\u0435\u0442, \u0447\u0435\u043c \u0440\u0435\u0436\u0438\u043c \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 \u0438 \u043d\u0443\u043b\u0435\u0432\u043e\u0435 \u043a\u043e\u043b\u044c\u0446\u043e \u0437\u0430\u0449\u0438\u0442\u044b. \u041a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0430\u0446\u0438\u044f SMM \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043d\u0435\u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f \u043a\u043e \u0432\u0441\u0435\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u043c\u043e\u0436\u0435\u0442 [&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-121973","post","type-post","status-publish","format-standard","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=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f AMD \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438 \u0448\u0435\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u0445 AMD EPYC \u0438 AMD Ryzen.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri 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