{"id":119848,"date":"2024-09-17T21:43:00","date_gmt":"2024-09-17T19:43:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/inzhener-iz-amd-predlozhil-uprostit-v-yadre-linux-upravlenie-blokirovkami-uyazvimostej-cpu"},"modified":"2024-09-17T21:43:00","modified_gmt":"2024-09-17T19:43:00","slug":"inzhener-iz-amd-predlozhil-uprostit-v-yadre-linux-upravlenie-blokirovkami-uyazvimostej-cpu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/inzhener-iz-amd-predlozhil-uprostit-v-yadre-linux-upravlenie-blokirovkami-uyazvimostej-cpu","title":{"rendered":"In\u017einier z AMD navrhol zjednodu\u0161i\u0165 v jadre Linux spravovanie blokovan\u00ed zranite\u013enost\u00ed CPU","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ke\u010f\u017ee po\u010det podporovan\u00fdch re\u017eimov v jadre Linux na ochranu pred zranite\u013enos\u0165ami v CPU dosiahol 15 a v\u00fdpis v\u0161etk\u00fdch zranite\u013enost\u00ed v pr\u00edkazovom riadku jadra sa stal pomerne zlo\u017eitou \u00falohou, v\u00fdvoj\u00e1r jadra z firmy AMD navrhol prejs\u0165 od nastavovania blokovania konkr\u00e9tnych zranite\u013enost\u00ed k v\u00fdberu blokovania \u00fato\u010dn\u00fdch vektorov. <\/p>\n

Met\u00f3dy blokovania sa navrhuj\u00fa aktivova\u0165 v z\u00e1vislosti od typu poru\u0161enia izol\u00e1cie: medzi pou\u017e\u00edvate\u013eom a jadrom (mitigate_user_kernel), medzi pou\u017e\u00edvate\u013eom a in\u00fdm pou\u017e\u00edvate\u013eom (mitigate_user_user), medzi hostite\u013esk\u00fdm syst\u00e9mom a hostite\u013esk\u00fdm prostred\u00edm (mitigate_guest_host), medzi r\u00f4znymi hostite\u013esk\u00fdmi syst\u00e9mami (mitigate_guest_guest) a medzi r\u00f4znymi vl\u00e1knami (mitigate_cross_thread). <\/p>\n

Navrhovan\u00fd pr\u00edstup umo\u017en\u00ed aktivova\u0165 len ochranu proti t\u00fdm triedam zranite\u013enost\u00ed, ktor\u00e9 skuto\u010dne zauj\u00edmaj\u00fa pou\u017e\u00edvate\u013ea. Napr\u00edklad, vlastn\u00edci cloudov\u00fdch prostred\u00ed m\u00f4\u017eu zapn\u00fa\u0165 re\u017eimy mitigate_guest_host a mitigate_guest_guest, po ktor\u00fdch bud\u00fa aktivovan\u00e9 met\u00f3dy ochrany proti zranite\u013enostiam BHI, GD, L1TF, MDS, MMIO, Retbleed, RFDS, Spectre_v2, SRBDS, SRSO a TAA. =============== ============== ============ ============= ============== ============ Zranite\u013enos\u0165 Pou\u017e\u00edvate\u013e-k-jadru Pou\u017e\u00edvate\u013e-k-pou\u017e\u00edvate\u013eovi Hostite\u013e-k-hostite\u013eovi Hostite\u013e-k-hostite\u013eovi Kr\u00ed\u017eov\u00fd-vl\u00e1kno =============== ============== ============ ============= ============== ============ BHI X X GDS X X X X L1TF X X MDS X X X X X MMIO X X X X X Meltodwn X Retbleed X X X RFDS X X X X Spectre_v1 X Spectre_v2 X X Spectre_v2_user X X SRBDS X X X X SRSO X X SSB TAA X X X X X
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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