{"id":104680,"date":"2022-07-21T09:36:51","date_gmt":"2022-07-21T07:36:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-yadre-linux-pozvolyayushhaya-obojti-ogranicheniya-rezhima-lockdown"},"modified":"2022-07-21T09:36:51","modified_gmt":"2022-07-21T07:36:51","slug":"uyazvimost-v-yadre-linux-pozvolyayushhaya-obojti-ogranicheniya-rezhima-lockdown","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/uyazvimost-v-yadre-linux-pozvolyayushhaya-obojti-ogranicheniya-rezhima-lockdown","title":{"rendered":"Vulnerabilitet n\u00eb b\u00ebrtham\u00ebn Linux q\u00eb lejon kalimin e kufizimeve t\u00eb modit Lockdown","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00eb b\u00ebrtham\u00ebn Linux \u00ebsht\u00eb zbuluar nj\u00eb dob\u00ebsi (CVE-2022-21505), e cila lejon leht\u00ebsisht shmangien e mekanizmit mbrojt\u00ebs Lockdown, i cili kufizon aksesin e p\u00ebrdoruesit root n\u00eb b\u00ebrtham\u00eb dhe bllokon rrug\u00ebt e shmangies s\u00eb UEFI Secure Boot. P\u00ebr t\u00eb kaluar k\u00ebt\u00eb, sugjerohet t\u00eb p\u00ebrdoret n\u00ebnshkalla e b\u00ebrtham\u00ebs IMA (Arkitektura e Mas\u00ebs s\u00eb Integritetit), e cila \u00ebsht\u00eb e dedikuar p\u00ebr verifikimin e integritetit t\u00eb komponent\u00ebve t\u00eb sistemit operativ n\u00ebp\u00ebrmjet n\u00ebnshkrimeve dixhitale dhe hash-eve. <\/p>\n

N\u00eb modalitetin lockdown kufizohet aksesin n\u00eb \/dev\/mem, \/dev\/kmem, \/dev\/port, \/proc\/kcore, debugfs, modalitetin e debugging kprobes, mmiotrace, tracefs, BPF, PCMCIA CIS (Struktura e Informacioneve t\u00eb Kart\u00ebs), disa interfazet ACPI dhe regjistrat MSR t\u00eb CPU-s\u00eb, bllokohen thirrjet kexec_file dhe kexec_load, ndalohet kalimi n\u00eb modalitetin gjum\u00eb, kufizohet p\u00ebrdorimi i DMA p\u00ebr pajisjet PCI, ndalohet importimi i kodit ACPI nga variablat EFI, nuk lejohet manipulimi me portet e hyrjes\/\u0442\u04d9\u0440\u0444\u00eb, duke p\u00ebrfshir\u00eb ndryshimin e numrave t\u00eb nd\u00ebrprerjeve dhe portit t\u00eb hyrjes\/torch\u00ebve p\u00ebr portin serial. <\/p>\n

The essence of the vulnerability is that using the boot parameter «ima_appraise=log» allows for a kexec call to boot a new copy of the kernel if Secure Boot is not enabled and Lockdown is used separately from it. IMA does not allow the «ima_appraise» mode to be enabled when Secure Boot is active, but does not consider the possibility of using Lockdown separately from Secure Boot.
\n
Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u044f\u0434\u0440\u0435 Linux \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-21505), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u0435\u0433\u043a\u043e \u043e\u0431\u043e\u0439\u0442\u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c \u0437\u0430\u0449\u0438\u0442\u044b Lockdown, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442 \u0434\u043e\u0441\u0442\u0443\u043f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f root \u043a \u044f\u0434\u0440\u0443 \u0438 \u0431\u043b\u043e\u043a\u0438\u0440\u0443\u0435\u0442 \u043f\u0443\u0442\u0438 \u043e\u0431\u0445\u043e\u0434\u0430 UEFI Secure Boot. \u0414\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0443 \u044f\u0434\u0440\u0430 IMA (Integrity Measurement Architecture), \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u0443\u044e \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043f\u043e \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u043c \u043f\u043e\u0434\u043f\u0438\u0441\u044f\u043c \u0438 \u0445\u044d\u0448\u0430\u043c. \u0412 \u0440\u0435\u0436\u0438\u043c\u0435 lockdown \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0434\u043e\u0441\u0442\u0443\u043f \u043a \/dev\/mem, […]<\/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-104680","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Dob\u00ebsia n\u00eb b\u00ebrtham\u00ebn Linux, e cila lejon shmangien e kufizimeve t\u00eb modalitetit Lockdown | ProHoster","description":"N\u00eb b\u00ebrtham\u00ebn Linux \u00ebsht\u00eb zbuluar nj\u00eb dob\u00ebsi (CVE-2022-21505), e cila lejon leht\u00ebsisht shmangien e mekanizmit mbrojt\u00ebs Lockdown, i cili kufizon aksesin e p\u00ebrdoruesit root n\u00eb b\u00ebrtham\u00eb dhe bllokon rrug\u00ebt e shmangies s\u00eb UEFI Secure Boot. P\u00ebr t\u00eb kaluar k\u00ebt\u00eb, sugjerohet t\u00eb p\u00ebrdoret n\u00ebnshkalla e b\u00ebrtham\u00ebs IMA (Arkitektura e Mas\u00ebs s\u00eb Integritetit), e cila \u00ebsht\u00eb e dedikuar p\u00ebr verifikimin e integritetit t\u00eb komponent\u00ebve t\u00eb sistemit operativ n\u00ebp\u00ebrmjet n\u00ebnshkrimeve dixhitale dhe hash-eve. 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\u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0443 \u044f\u0434\u0440\u0430 IMA (Integrity Measurement Architecture), \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u0443\u044e \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043f\u043e \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u043c \u043f\u043e\u0434\u043f\u0438\u0441\u044f\u043c \u0438 \u0445\u044d\u0448\u0430\u043c. \u0412 \u0440\u0435\u0436\u0438\u043c\u0435 lockdown \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0434\u043e\u0441\u0442\u0443\u043f \u043a 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