{"id":880448,"date":"2024-02-15T18:49:03","date_gmt":"2024-02-15T17:49:03","guid":{"rendered":"https:\/\/www.tomshardware.fr\/?p=880448"},"modified":"2024-02-16T10:24:32","modified_gmt":"2024-02-16T09:24:32","slug":"attention-tous-les-processeurs-zen-damd-sont-victimes-de-failles-de-securite-importantes","status":"publish","type":"post","link":"https:\/\/www.tomshardware.fr\/attention-tous-les-processeurs-zen-damd-sont-victimes-de-failles-de-securite-importantes\/","title":{"rendered":"Attention, tous les processeurs Zen d’AMD sont victimes de failles de s\u00e9curit\u00e9 importantes"},"content":{"rendered":"\n
\"AMD<\/figure>\n\n\n\n

Alors qu\u2019AMD travaille activement \u00e0 la prochaine g\u00e9n\u00e9ration de ses GPU RDNA 4<\/a>, l\u2019entreprise est confront\u00e9e \u00e0 une nouvelle crise. Cette fois-ci, il ne s\u2019agit pas d\u2019un probl\u00e8me li\u00e9 \u00e0 sa technologie Anti-Lag+ r\u00e9cemment d\u00e9sactiv\u00e9e<\/a>, mais d\u2019une vuln\u00e9rabilit\u00e9 affectant l’ensemble de ses processeurs Zen.<\/p>\n\n\n\n

Selon AMD, tous les CPU des g\u00e9n\u00e9rations 1 \u00e0 4<\/strong> seraient concern\u00e9s par des failles de s\u00e9curit\u00e9. Identifi\u00e9es du c\u00f4t\u00e9 du BIOS, elles auraient un impact important sur la s\u00e9curit\u00e9<\/strong> des syst\u00e8mes. Elles pourraient notamment compromettre la liaison SPI. Selon les informations partag\u00e9es par la firme, ces vuln\u00e9rabilit\u00e9s pourraient entra\u00eener de s\u00e9rieux probl\u00e8mes.<\/p>\n\n\n\n

Selon AMD les vuln\u00e9rabilit\u00e9s des processeurs Zen sont s\u00e9v\u00e8res<\/h2>\n\n\n\n

AMD affirme que ces failles atteignent un niveau de gravit\u00e9 “\u00e9lev\u00e9”<\/strong>. Les vuln\u00e9rabilit\u00e9s nouvellement d\u00e9couvertes ont \u00e9t\u00e9 d\u00e9crites comme pouvant permettre l’activation de codes arbitraires<\/strong> ainsi que d’autres activit\u00e9s malveillantes. Elles sont divis\u00e9es en quatre vuln\u00e9rabilit\u00e9s CVE<\/strong>, chacune exploitant des failles dans l’interface SPI.<\/p>\n\n\n\n


CVE
<\/th>		S\u00e9v\u00e9rit\u00e9<\/th>Description<\/th><\/tr><\/thead>
CVE-2023-20576<\/td>\u00c9lev\u00e9<\/td>Une v\u00e9rification insuffisante de l’authenticit\u00e9 des donn\u00e9es dans AGESA peut permettre \u00e0 un attaquant de mettre \u00e0 jour les donn\u00e9es ROM SPI, pouvant entra\u00eener un d\u00e9ni de service ou une escalade de privil\u00e8ges.<\/td><\/tr>
CVE-2023-20577<\/td>\u00c9lev\u00e9<\/td>Un d\u00e9bordement dans le module SMM peut permettre \u00e0 un attaquant ayant acc\u00e8s \u00e0 une vuln\u00e9rabilit\u00e9 secondaire d’autoriser l’\u00e9criture dans le flash SPI, pouvant entra\u00eener l’ex\u00e9cution de code arbitraire.<\/td><\/tr>
CVE-2023-20579<\/td>\u00c9lev\u00e9<\/td>Un contr\u00f4le d’acc\u00e8s incorrect dans la fonction de protection SPI d’AMD peut permettre \u00e0 un utilisateur ayant un acc\u00e8s privil\u00e9gi\u00e9 Ring0 (mode kernel) de contourner les protections, pouvant entra\u00eener une perte d’int\u00e9grit\u00e9 et de disponibilit\u00e9.<\/td><\/tr>
CVE-2023-20587<\/td>\u00c9lev\u00e9<\/td>Un contr\u00f4le d’acc\u00e8s incorrect en mode de gestion syst\u00e8me (SMM) peut permettre aux attaquants d’acc\u00e9der au flash SPI, pouvant entra\u00eener une ex\u00e9cution de code arbitraire.<\/td><\/tr><\/tbody><\/table><\/div><\/figure>\n\n\n\n

AMD \u00e0 d\u00e9j\u00e0 d\u00e9ploy\u00e9 un correctif mais pas pour tous le monde<\/h2>\n\n\n
\n
\"AMD
\u00a9AMD<\/figcaption><\/figure><\/div>\n\n\n

Pour att\u00e9nuer ces risques, AMD a rapidement r\u00e9agi<\/strong> en d\u00e9ployant des correctifs<\/strong>. Ils visent \u00e0 fournir des mesures d’att\u00e9nuation pour certains processeurs AMD Ryzen<\/strong>, EPYC, Threadripper et Embedded. Cependant, des pr\u00e9occupations subsistent quant \u00e0 la disponibilit\u00e9 des correctifs. Notamment en ce qui concerne les produits qu\u2019AMD dont les mise \u00e0 jour ont ralenti, comme les Ryzen 5000G<\/a>.<\/p>\n\n\n\n

\u00c0 noter que les cartes m\u00e8res bas\u00e9es sur AM5, TRX50 et WRX90 sont s\u00e9curis\u00e9es contre la faille. <\/strong>De plus les cartes int\u00e9grants l‘AM4 sont \u00e9galement prot\u00e9g\u00e9es<\/strong> (Ryzen 3000 et 5000). En revanche les cartes m\u00e8res ne disposant pas encore de ces versions d’AGESA sont expos\u00e9es, il faut donc faire attention. Par exemple, les APU (Accelerated Processing Unit) Ryzen 4000G<\/a> et 5000G ne b\u00e9n\u00e9ficient pas des correctifs<\/strong> pour l’instant.<\/p>\n\n\n\n

Quoi qu\u2019il en soit, AMD a conseill\u00e9 \u00e0 ses usagers de mettre \u00e0 jour<\/strong> vers les derni\u00e8res versions d’AGESA<\/strong>. Ce serait le meilleur moyen de garantir la s\u00e9curit\u00e9 du mat\u00e9riel. En esp\u00e9rant que l\u2019entreprise ne d\u00e9laisse pas ses utilisateurs et apporte rapidement une solution pour les APU qui ne sont plus ou moins mis \u00e0 jour.<\/p>\n\n\n\n

\n
    \n
  • L’ensemble des processeurs Zen d’AMD sont victimes d’un probl\u00e8me de s\u00e9curit\u00e9.<\/li>\n
  • Les g\u00e9n\u00e9rations 1 \u00e0 4 sont vuln\u00e9rables \u00e0 plusieurs failles de s\u00e9curit\u00e9 de gravit\u00e9 \u00e9lev\u00e9e selon AMD.<\/li>\n
  • AMD a lanc\u00e9 des correctifs et recommande de mettre \u00e0 jour son mat\u00e9riel.<\/li>\n <\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    Les processeurs Zen de g\u00e9n\u00e9ration 1 \u00e0 4 d\u2019AMD sont victimes d\u2019une vuln\u00e9rabilit\u00e9 critique. AMD a partag\u00e9 une liste de failles de s\u00e9curit\u00e9 affectant l\u2019architecture des CPU Ryzen, les laissant \u00e0 la merci de dangers\u2026<\/p>","protected":false},"author":139,"featured_media":880455,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4071],"tags":[551,4064,4065],"hubs":[],"class_list":["post-880448","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-processeurs","tag-amd","tag-ryzen","tag-ryzen-7000-series"],"acf":{"display_mode":"medium-img","post_show_excerpt":true,"post_show_in_home":false,"post_show_summary":false,"post_source":"","hide_sidebar":false,"hide_advertising":false,"custom_ga_words":""},"yoast_head":"\nAttention, tous les processeurs Zen d'AMD sont victimes de failles de s\u00e9curit\u00e9 importantes<\/title>\n<meta name=\"description\" content=\"Les processeurs Zen de g\u00e9n\u00e9ration 1 \u00e0 4 d\u2019AMD sont victimes d\u2019une vuln\u00e9rabilit\u00e9 critique. 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