{"id":123472,"date":"2025-04-11T15:05:18","date_gmt":"2025-04-11T13:05:18","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/cpu-amd-zen-5-podverzheny-uyazvimosti-dopuskayushhej-izmenenie-mikrokoda-i-obhod-izolyaczii-sev-snp"},"modified":"2025-04-11T15:05:18","modified_gmt":"2025-04-11T13:05:18","slug":"cpu-amd-zen-5-podverzheny-uyazvimosti-dopuskayushhej-izmenenie-mikrokoda-i-obhod-izolyaczii-sev-snp","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/cpu-amd-zen-5-podverzheny-uyazvimosti-dopuskayushhej-izmenenie-mikrokoda-i-obhod-izolyaczii-sev-snp","title":{"rendered":"CPU AMD Zen 5 jan\u00eb t\u00eb ndjesh\u00ebm ndaj nj\u00eb vulnerabiliteti q\u00eb lejon ndryshimin e mikrokodit dhe kalimin p\u00ebrmes izolimit SEV-SNP.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Kompania AMD ka p\u00ebrfshir\u00eb procesor\u00ebt me mikroarkitektur\u00eb Zen 5 n\u00eb list\u00ebn e produkteve t\u00eb prekura nga vulnerabiliteti EntrySign, i cili lejon kalimin e mekanizmit t\u00eb verifikimit t\u00eb n\u00ebnshkrimit digjital gjat\u00eb azhurnimit t\u00eb mikrocode-it. Fillimisht mendohej se vulnerabiliteti prekte vet\u00ebm CPU-t\u00eb e AMD-s\u00eb t\u00eb bazuara n\u00eb gjeneratat 1-4 t\u00eb mikroarkitektur\u00ebs Zen. K\u00ebshtu, vulnerabiliteti ndikon n\u00eb procesor\u00eb si Ryzen 9000 (Granite Ridge), EPYC 9005 (Turin), Ryzen AI 300 (Strix Halo, Strix Point, Krackan Point) dhe Ryzen 9000HX (Fire Range).     <\/p>\n<p>P\u00ebrve\u00e7 azhurnimit t\u00eb mikrocode-it, p\u00ebr t\u00eb eliminuar vulnerabilitetin n\u00eb sistemet q\u00eb p\u00ebrdorin verifikimin SEV-SNP, nevojitet gjithashtu azhurnimi i firmuerit AMD SEV, i cili ofrohet n\u00eb paketat e azhurnimeve t\u00eb BIOS-it. Raportohet se kompania AMD i ka d\u00ebrguar prodhuesve t\u00eb pajisjeve firmuerin e modifikuar (ComboAM5PI 1.2.0.3c AGESA) t\u00eb nevojsh\u00ebm p\u00ebr t\u00eb adresuar problemin, por azhurnimet p\u00ebrfundimtare t\u00eb BIOS-it p\u00ebr konsumator\u00ebt mund t\u00eb l\u00ebshohen nga prodhuesit pas jav\u00ebsh ose muajsh.     <\/p>\n<p>Pjes\u00ebtar\u00ebt e AMD gjithashtu kan\u00eb propozuar p\u00ebrfshirjen n\u00eb b\u00ebrtham\u00ebn Linux t\u00eb nj\u00eb patchi q\u00eb bllokon ngarkimin e azhurnimeve t\u00eb paautorizuara t\u00eb mikrocode-it (duhet t\u00eb theksohet se azhurnimet e sakta t\u00eb mikrocode-it duhen instaluar s\u00eb bashku me BIOS-in nga prodhuesi i pajisjeve, por tashm\u00eb kan\u00eb filluar p\u00ebrpjekjet p\u00ebr t\u00eb krijuar p\u00ebrmir\u00ebsime jooficiale nga entuziast\u00eb, t\u00eb bazuara n\u00eb copa mikrocode q\u00eb jan\u00eb hequr nga BIOS). P\u00ebrdoruesit k\u00ebshillohen t\u00eb presin azhurnimet zyrtare t\u00eb BIOS-it.    <\/p>\n<p>Vulnerabiliteti EntrySign siguron mund\u00ebsin\u00eb e ndryshimit t\u00eb mikrocode-it, duke e b\u00ebr\u00eb t\u00eb mundur komprometimin e mekanizmit AMD SEV (Virtualizimi i Kriptuar t\u00eb Sigurt), i cili p\u00ebrdoret n\u00eb sistemet e virtualizimit p\u00ebr mbrojtje <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sq\/vps\/\"   title=\"makinave virtuale\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2018\">makinave virtuale<\/a> nga nd\u00ebrhyrja e hipervizorit apo administratori t\u00eb sistemit host. Gjat\u00eb nj\u00eb sulmi \u00ebsht\u00eb e mundur t\u00eb nd\u00ebrhyn n\u00eb funksionimin e sistemeve t\u00eb mysafir\u00ebve t\u00eb mbrojtura me ndihm\u00ebn e zgjerimeve AMD SEV (Virtualizimi i Kriptuar t\u00eb Sigurt) dhe SEV-SNP (P\u00ebrfaq\u00ebsimi i Sigurt t\u00eb Shtresave), t\u00eb cilat ofrojn\u00eb garanci t\u00eb integritetit t\u00eb memories s\u00eb makinave virtuale, duke izoluara regjistrin e procesor\u00ebve dhe duke siguruar nj\u00eb funksionim t\u00eb sigurt me tabelat e brendshme t\u00eb memories.     <\/p>\n<p>Vulnerabiliteti shkaktohet nga p\u00ebrdorimi i algoritmit t\u00eb verifikimit t\u00eb mikrocode-it CMAC n\u00eb procesin e verifikimit n\u00eb vend t\u00eb nj\u00eb funksioni hash t\u00eb besuesh\u00ebm. Kompania AMD p\u00ebrdor nj\u00eb \u00e7el\u00ebs privat RSA p\u00ebr t\u00eb n\u00ebnshkruar mikrocode-in q\u00eb ngarkohet n\u00eb procesor, dhe n\u00eb paket\u00ebn e patch-it shp\u00ebrndan \u00e7el\u00ebsin publik. P\u00ebr t\u00eb verifikuar se \u00e7el\u00ebsi publik p\u00ebrputhet me \u00e7iftin origjinal t\u00eb \u00e7el\u00ebsave RSA, procesori b\u00ebn nj\u00eb p\u00ebrputhje t\u00eb hash-it nga \u00e7el\u00ebsi publik AMD, i ngulitur gjat\u00eb prodhimit n\u00eb CPU, me hash-in nga \u00e7el\u00ebsi publik q\u00eb \u00ebsht\u00eb specifikuar n\u00eb patch.     <\/p>\n<p>Autentikimi i mikrokodit n\u00eb patch b\u00ebhet duke krahasuar hash-in e ofruar me patch-in, i cili \u00ebsht\u00eb i n\u00ebnshkruar digjitalisht (RSASSA-PKCS1-v1_5), dhe hash-in e llogaritur n\u00eb baz\u00eb t\u00eb mikrokodit real t\u00eb ofruar n\u00eb patch. N\u00ebse hash-\u00ebt referues dhe t\u00eb llogaritur p\u00ebrputhen \u2014 patch-i ngarkohet n\u00eb memorjen e brendshme t\u00eb CPU-s\u00eb. Problemi \u00ebsht\u00eb se, n\u00eb vend t\u00eb p\u00ebrdorimit t\u00eb funksioneve t\u00eb kriptimit t\u00eb rekomanduara, \u00ebsht\u00eb p\u00ebrdorur algoritmi CMAC, i cili nuk \u00ebsht\u00eb i dizajnuar p\u00ebr operacione t\u00eb tilla dhe nuk \u00ebsht\u00eb i mbrojtur nga gjetja e kolizionit.    <\/p>\n<p>CMAC nuk \u00ebsht\u00eb nj\u00eb funksion hash, por implementon nj\u00eb kod autentikimi t\u00eb mesazhit (Message Authentication Code), i varur nga \u00e7el\u00ebsi i enkriptimit. Funksioni AES-CMAC p\u00ebrfshin p\u00ebrdorimin e algoritmit kriptografik AES dhe bashkimin e rezultatit t\u00eb tij me bllokun e ardhsh\u00ebm t\u00eb t\u00eb dh\u00ebnave p\u00ebrmes operacionit XOR. Kjo skem\u00eb garanton se \u00e7do ndryshim n\u00eb t\u00eb dh\u00ebnat hyr\u00ebse do t\u00eb \u00e7oj\u00eb n\u00eb nj\u00eb ndryshim t\u00eb paparashikuesh\u00ebm n\u00eb t\u00eb dh\u00ebnat e daljes. Megjithat\u00eb, CMAC nuk duhet t\u00eb p\u00ebrdoret si nj\u00eb funksion hash, sepse \u00e7do kush q\u00eb di \u00e7el\u00ebsin origjinal t\u00eb enkriptimit mund t\u00eb zbuloj\u00eb gjendjet e nd\u00ebrmjetme t\u00eb enkriptimit dhe t\u00eb llogaris\u00eb vlerat q\u00eb do t\u00eb kompensojn\u00eb ndryshimin n\u00eb t\u00eb dh\u00ebnat hyr\u00ebse n\u00eb m\u00ebnyr\u00eb q\u00eb rezultati i p\u00ebrdorimit t\u00eb CMAC t\u00eb mbetet i pandryshuar.     <\/p>\n<p>AMD p\u00ebrdor p\u00ebr AES-CMAC nj\u00eb \u00e7el\u00ebs t\u00eb vet\u00ebm enkriptimi, i ofruar n\u00eb t\u00eb gjith\u00eb CPU-t\u00eb, duke filluar nga Zen 1. K\u00ebshtu, mjafton t\u00eb nxirret ky \u00e7el\u00ebs nga \u00e7do CPU AMD dhe do t\u00eb jet\u00eb i aplikuesh\u00ebm p\u00ebr t\u00eb gjith\u00eb CPU-t\u00eb e tjer\u00eb. Hulumtuesit zbuluan se p\u00ebr enkriptimin AES-CMAC, AMD ka p\u00ebrdorur nj\u00eb \u00e7el\u00ebs t\u00eb njohur, t\u00eb marr\u00eb nga nj\u00eb shembull t\u00eb p\u00ebrmendur n\u00eb rekomandimet p\u00ebr p\u00ebrdorimin e algoritmave t\u00eb bllokuar NIST SP 800-38B. Duke qen\u00eb se AES-CMAC p\u00ebrdoret p\u00ebr hashing-un e \u00e7el\u00ebsit RSA t\u00eb ngulitur n\u00eb patch dhe p\u00ebrmbajtjes s\u00eb mikrocode-it, p\u00ebrcaktimi i \u00e7el\u00ebsit t\u00eb enkriptimit AES-CMAC krijon mund\u00ebsin\u00eb e z\u00ebvend\u00ebsimit t\u00eb \u00e7el\u00ebsit tjet\u00ebr publik RSA n\u00eb patch dhe ndryshimin e p\u00ebrmbajtjes s\u00eb mikrocode-it.       <\/p>\n<p>P\u00ebr t\u00eb krijuar nj\u00eb patch t\u00eb rrem\u00eb, mjafton t\u00eb formoni nj\u00eb \u00e7el\u00ebs t\u00eb ri publik, i cili gjeneron t\u00eb nj\u00ebjtin hash si\u00e7 gjenerohej nga \u00e7el\u00ebsi i v\u00ebrtet\u00eb publik AMD, si dhe t\u00eb p\u00ebrzgjidhni kolizione p\u00ebr n\u00ebnshkrimin digjital. Kolizionet krijohen duke bashkangjitur nj\u00eb bllok t\u00eb kodit mik, i duksh\u00ebm si nj\u00eb grup t\u00eb dh\u00ebnash t\u00eb rast\u00ebsishme. N\u00eb k\u00ebt\u00eb m\u00ebnyr\u00eb mund t\u00eb p\u00ebrgatitet nj\u00eb patch i modifikuar me kod mik, n\u00eb p\u00ebrputhje me n\u00ebnshkrimin digjital me t\u00eb cilin \u00ebsht\u00eb vulosur patchi origjinal nga AMD. Instrumenti Zentool, i cili p\u00ebrfshin mjete p\u00ebr analizimin e kodit mik dhe krijimin e patches p\u00ebr ndryshimin e kodit mik, \u00ebsht\u00eb n\u00eb dispozicion n\u00ebn licenc\u00ebn Apache 2.0. P\u00ebr t\u00eb z\u00ebvend\u00ebsuar kodin mik, nevojitet t\u00eb ken\u00eb t\u00eb drejta p\u00ebr t\u00eb ekzekutuar kodin n\u00eb nivelin e rrethit t\u00eb mbrojtjes zero (teknologjit\u00eb VT-x dhe AMD-V lejojn\u00eb q\u00eb sistemi mik t\u00eb ekzekutohet me t\u00eb drejta Ring 0).<br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63055\">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 \u0432\u043a\u043b\u044e\u0447\u0438\u043b\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b \u043d\u0430 \u0431\u0430\u0437\u0435 \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b Zen 5 \u0432 \u0441\u043f\u0438\u0441\u043e\u043a \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432, \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u043d\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 EntrySign, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u0431\u043e\u0439\u0442\u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u043f\u043e\u0434\u043f\u0438\u0441\u0438 \u043f\u0440\u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u0434\u0430. \u0418\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u043b\u043e\u0441\u044c, \u0447\u0442\u043e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u0442\u043e\u043b\u044c\u043a\u043e CPU AMD \u043d\u0430 \u0431\u0430\u0437\u0435 1-4 \u043f\u043e\u043a\u043e\u043b\u0435\u043d\u0438\u0439 \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b Zen. \u0422\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u043a\u0430\u0437\u0430\u043b\u0430\u0441\u044c \u043f\u0440\u0438\u043c\u0435\u043d\u0438\u043c\u0430 \u043a \u0442\u0430\u043a\u0438\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u043c, \u043a\u0430\u043a Ryzen 9000 (Granite Ridge), EPYC 9005 (Turin), Ryzen [&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-123472","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f AMD \u0432\u043a\u043b\u044e\u0447\u0438\u043b\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b \u043d\u0430 \u0431\u0430\u0437\u0435 \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b Zen 5 \u0432 \u0441\u043f\u0438\u0441\u043e\u043a \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432, \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u043d\u044b\u0445 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5 jan\u00eb t\u00eb ndjeshme ndaj vulnerabilitetit, q\u00eb lejon ndryshimin e kodit mik dhe kalimin e izolimit SEV-SNP | ProHoster","description":"Firma AMD ka p\u00ebrfshir\u00eb procesor\u00ebt e bazuar n\u00eb mikroarkitektur\u00ebn Zen 5 n\u00eb list\u00ebn e produkteve t\u00eb ndjeshme ndaj vulnerabilitetit EntrySign, i cili lejon q\u00eb t\u00eb kaloj\u00eb mekanizmin e verifikimit t\u00eb n\u00ebnshkrimit digjital gjat\u00eb azhurnimit t\u00eb kodit mik. N\u00eb fillim u mendua se vulnerabiliteti ndikon vet\u00ebm CPU-t\u00eb AMD t\u00eb bazuara n\u00eb brezat 1-4 t\u00eb mikroarkitektur\u00ebs Zen. K\u00ebshtu, vulnerabiliteti rezultoi se ishte i aplikuesh\u00ebm p\u00ebr procesor\u00eb si Ryzen 9000 (Granite Ridge), EPYC 9005 (Turin), Ryzen.","canonical_url":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/cpu-amd-zen-5-podverzheny-uyazvimosti-dopuskayushhej-izmenenie-mikrokoda-i-obhod-izolyaczii-sev-snp","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sq_AL","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\udd47CPU AMD Zen 5 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, 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