{"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\/cs\/blog\/news\/inzhener-iz-amd-predlozhil-uprostit-v-yadre-linux-upravlenie-blokirovkami-uyazvimostej-cpu","title":{"rendered":"In\u017een\u00fdr z AMD navrhl zjednodu\u0161en\u00ed spr\u00e1vy blokac\u00ed zranitelnost\u00ed CPU v j\u00e1d\u0159e Linux.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Vzhledem k tomu, \u017ee po\u010det re\u017eim\u016f podporovan\u00fdch v j\u00e1d\u0159e Linux pro ochranu proti zranitelnostem v CPU dos\u00e1hl 15 a vyjmenov\u00e1n\u00ed v\u0161ech zranitelnost\u00ed v p\u0159\u00edkazov\u00e9m \u0159\u00e1dku j\u00e1dra se stalo pom\u011brn\u011b slo\u017eit\u00fdm \u00fakolem, navrhl v\u00fdvoj\u00e1\u0159 j\u00e1dra z firmy AMD p\u0159ej\u00edt od nastaven\u00ed blokov\u00e1n\u00ed konkr\u00e9tn\u00edch zranitelnost\u00ed k v\u00fdb\u011bru blokov\u00e1n\u00ed vektor\u016f \u00fatok\u016f. <\/p>\n

Metody blokov\u00e1n\u00ed se navrhuj\u00ed aktivovat v z\u00e1vislosti na druhu poru\u0161en\u00ed izolace: mezi u\u017eivatelem a j\u00e1drem (mitigate_user_kernel), mezi u\u017eivateli (mitigate_user_user), mezi hostitelsk\u00fdm prost\u0159ed\u00edm a hostovan\u00fdm syst\u00e9mem (mitigate_guest_host), mezi r\u016fzn\u00fdmi hostovan\u00fdmi syst\u00e9my (mitigate_guest_guest) a mezi r\u016fzn\u00fdmi vl\u00e1kny (mitigate_cross_thread). <\/p>\n

Navrhovan\u00fd p\u0159\u00edstup umo\u017en\u00ed aktivovat ochranu pouze proti t\u011bm t\u0159\u00edd\u00e1m zranitelnost\u00ed, kter\u00e9 u\u017eivatele skute\u010dn\u011b zaj\u00edmaj\u00ed. Nap\u0159\u00edklad vlastn\u00edci cloudov\u00fdch prost\u0159ed\u00ed mohou aktivovat re\u017eimy mitigate_guest_host a mitigate_guest_guest, po \u010dem\u017e budou aktivov\u00e1ny metody ochrany proti zranitelnostem BHI, GD, L1TF, MDS, MMIO, Retbleed, RFDS, Spectre_v2, SRBDS, SRSO a TAA. =============== ============== ============ ============= ============== ============ Zranitelnost U\u017eivatel-k-j\u00e1dru U\u017eivatel-k-u\u017eivateli Host-k-hostovan\u00e9 Host-k-hostovan\u00e9mu Mezi vl\u00e1kny =============== ============== ============ ============= ============== ============ BHI X X GDS X X X X L1TF X X MDS X X X X X MMIO X X X X X Meltdown 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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