{"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\/hu\/blog\/news\/uyazvimosti-v-cpu-amd-pozvolyayushhie-vypolnit-kod-na-urovne-smm","title":{"rendered":"CPU AMD sebezhet\u0151s\u00e9gek, amelyek lehet\u0151v\u00e9 teszik a k\u00f3d v\u00e9grehajt\u00e1s\u00e1t SMM szintj\u00e9n","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Az AMD bejelentette, hogy hat s\u00e9r\u00fcl\u00e9kenys\u00e9get jav\u00edtott az AMD EPYC \u00e9s az AMD Ryzen processzorokban. A h\u00e1rom legvesz\u00e9lyesebb s\u00e9r\u00fcl\u00e9kenys\u00e9g (CVE-2023-31342, CVE-2023-31343, CVE-2023-31345) potenci\u00e1lisan lehet\u0151v\u00e9 teszi, hogy a t\u00e1mad\u00f3 k\u00f3dot futtasson az SMM (System Management Mode) szintj\u00e9n, amely magasabb priorit\u00e1ssal b\u00edr, mint a hipervizor \u00fczemm\u00f3d \u00e9s a nulla v\u00e9delmi gy\u0171r\u0171. Az SMM kompromitt\u00e1l\u00e1sa korl\u00e1tlan hozz\u00e1f\u00e9r\u00e9st biztos\u00edt az \u00f6sszes rendszermem\u00f3ri\u00e1hoz, \u00e9s haszn\u00e1lhat\u00f3 az oper\u00e1ci\u00f3s rendszer ellen\u0151rz\u00e9s\u00e9re. A s\u00e9r\u00fcl\u00e9kenys\u00e9geket az SMM kezel\u0151j\u00e9ben v\u00e9gzett nem megfelel\u0151 bemenet-ellen\u0151rz\u00e9s okozza, amely lehet\u0151v\u00e9 teszi a privilegiz\u00e1lt t\u00e1mad\u00f3 sz\u00e1m\u00e1ra, hogy fel\u00fcl\u00edrja az SMRAM tartalm\u00e1t. A t\u00e1mad\u00e1si m\u00f3dszer r\u00e9szleteit egyel\u0151re nem hozt\u00e1k nyilv\u00e1noss\u00e1gra.      <\/p>\n<p>A t\u00f6bbi s\u00e9r\u00fcl\u00e9kenys\u00e9g:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-31352 \u2014 hiba az AMD SEV (Biztons\u00e1gos Titkos\u00edtott Virtualiz\u00e1ci\u00f3) firmware-j\u00e9ben, amelyet a virtu\u00e1lis rendszerek v\u00e9delm\u00e9re haszn\u00e1lnak. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/vps\/\"   title=\"virtu\u00e1lis g\u00e9pekhez\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2136\">virtu\u00e1lis g\u00e9pekhez<\/a> a hipervizor vagy a gazda rendszer adminisztr\u00e1tor\u00e1nak beavatkoz\u00e1s\u00e1t\u00f3l. Hasonl\u00f3an a febru\u00e1r elej\u00e9n jav\u00edtott s\u00e9r\u00fcl\u00e9kenys\u00e9ghez, a probl\u00e9ma lehet\u0151v\u00e9 teszi az adminisztr\u00e1tor sz\u00e1m\u00e1ra, aki hozz\u00e1f\u00e9r a gazda k\u00f6rnyezethez, hogy elolvassa a mem\u00f3ri\u00e1nak azokat az \u00e9rintetlen tartalm\u00e1t, amelyekben potenci\u00e1lisan bizalmas adatok tal\u00e1lhat\u00f3ak a vend\u00e9g rendszerb\u0151l.\n<li class=\"l\"> CVE-2023-20582 \u2014 lehet\u0151s\u00e9g a RMP (Ford\u00edtott T\u00e9rk\u00e9p T\u00e1bl\u00e1zat) ellen\u0151rz\u00e9seinek megker\u00fcl\u00e9s\u00e9re az SEV-SNP (Biztons\u00e1gos Be\u00e1gyazott Lapoz\u00e1s) kiterjeszt\u00e9s haszn\u00e1lata sor\u00e1n, amely biztons\u00e1gos m\u0171k\u00f6d\u00e9st biztos\u00edt a be\u00e1gyazott mem\u00f3riaoldal t\u00e1bl\u00e1k sz\u00e1m\u00e1ra. Az adminisztr\u00e1tori jogokkal rendelkez\u0151 t\u00e1mad\u00f3 olyan felt\u00e9teleket teremthet, amelyek kiv\u00e9telt (fault) okozhatnak a PTE (Mem\u00f3riaoldal T\u00e1bl\u00e1zat Bejegyz\u00e9s) ellen\u0151rz\u00e9s\u00e9nek megker\u00fcl\u00e9s\u00e9re.\n<li class=\"l\"> CVE-2023-20581 \u2014 a hozz\u00e1f\u00e9r\u00e9s-vez\u00e9rl\u00e9s hib\u00e1ja az IOMMU-ban, amely lehet\u0151v\u00e9 teszi, hogy egy privilegiz\u00e1lt t\u00e1mad\u00f3 megker\u00fclje az RMP ellen\u0151rz\u00e9st \u00e9s megs\u00e9rtse a vend\u00e9g rendszer mem\u00f3ri\u00e1j\u00e1nak integrit\u00e1s\u00e1t.  <\/ul>\n<p>A s\u00e9r\u00fcl\u00e9kenys\u00e9gek megjelennek az AMD EPYC processzorok 3. \u00e9s 4. gener\u00e1ci\u00f3j\u00e1ban, az AMD EPYC 7003 \u00e9s 9004 sorozat\u00fa be\u00e1gyazott CPU-kban, az AMD Ryzen Embedded R1000, R2000, 5000, 7000, V2000 \u00e9s V3000 sorozatokban, valamint az AMD Ryzen 3000, 4000, 5000, 7000 \u00e9s 8000 asztali sorozatokban, tov\u00e1bb\u00e1 az AMD Athlon 3000 sorozatban is.<br \/>\n<br \/>Forr\u00e1s: <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 5.0.3 - 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\" 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