{"id":104822,"date":"2022-08-13T09:36:55","date_gmt":"2022-08-13T07:36:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-yadre-linux-pozvolyayushhaya-izmenit-soderzhimoe-tmpfs-i-razdelyaemoj-pamyati"},"modified":"2022-08-13T09:36:55","modified_gmt":"2022-08-13T07:36:55","slug":"uyazvimost-v-yadre-linux-pozvolyayushhaya-izmenit-soderzhimoe-tmpfs-i-razdelyaemoj-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/uyazvimost-v-yadre-linux-pozvolyayushhaya-izmenit-soderzhimoe-tmpfs-i-razdelyaemoj-pamyati","title":{"rendered":"Dob\u00ebsi n\u00eb kernelin Linux q\u00eb lejon ndryshimin e p\u00ebrmbajtjes s\u00eb tmpfs dhe memories s\u00eb p\u00ebrbashk\u00ebt","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00eb kernelin Linux \u00ebsht\u00eb zbuluar nj\u00eb dob\u00ebsi (CVE-2022-2590) q\u00eb i lejon nj\u00eb p\u00ebrdoruesi pa privilegje t\u00eb ndryshoj\u00eb skedar\u00ebt e mapuar n\u00eb memorie (mmap) dhe skedar\u00ebt n\u00eb tmpfs pa pasur t\u00eb drejta shkrimi mbi to, si edhe t\u00eb rris\u00eb privilegjet e veta n\u00eb sistem. P\u00ebr nga natyra, problemi i zbuluar i ngjan dob\u00ebsis\u00eb Dirty COW, por ndryshon sepse kufizohet vet\u00ebm te ndikimi mbi t\u00eb dh\u00ebnat n\u00eb memorien e p\u00ebrbashk\u00ebt (shmem \/ tmpfs). Problemi mund t\u00eb p\u00ebrdoret edhe p\u00ebr t\u00eb modifikuar skedar\u00eb ekzekutues n\u00eb p\u00ebrdorim q\u00eb shfryt\u00ebzojn\u00eb memorien e p\u00ebrbashk\u00ebt. <\/p>\n

Problemi shkaktohet nga nj\u00eb race condition n\u00eb n\u00ebnsistemin e menaxhimit t\u00eb memories, q\u00eb shfaqet gjat\u00eb p\u00ebrpunimit t\u00eb nj\u00eb p\u00ebrjashtimi (fault) t\u00eb gjeneruar kur tentohet qasja p\u00ebr shkrim n\u00eb zona t\u00eb memories s\u00eb p\u00ebrbashk\u00ebt t\u00eb disponueshme vet\u00ebm p\u00ebr lexim, t\u00eb mapuara n\u00eb regjimin COW (copy-on-write mapping). Problemi shfaqet duke filluar nga kernel 5.16 n\u00eb sisteme me arkitektur\u00eb x86-64 dhe aarch64 kur kerneli kompilohet me opsionin CONFIG_USERFAULTFD=y. Dob\u00ebsia \u00ebsht\u00eb korrigjuar n\u00eb versionin 5.19. Publikimi i nj\u00eb shembulli exploit \u00ebsht\u00eb planifikuar p\u00ebr 15 gusht.
\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-2022-2590), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u043e\u0442\u0440\u0430\u0436\u0451\u043d\u043d\u044b\u0435 \u0432 \u043f\u0430\u043c\u044f\u0442\u044c \u0444\u0430\u0439\u043b\u044b (mmap) \u0438 \u0444\u0430\u0439\u043b\u044b \u0432 tmpfs, \u043d\u0435 \u0438\u043c\u0435\u044f \u043f\u0440\u0430\u0432 \u043d\u0430 \u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u043d\u0438\u0445, \u0438 \u043f\u043e\u0434\u043d\u044f\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u041f\u043e \u0441\u0432\u043e\u0435\u043c\u0443 \u0442\u0438\u043f\u0443 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043d\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u0435\u0442 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c Dirty COW, \u043d\u043e \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u0442\u0435\u043c, \u0447\u0442\u043e \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432\u043e\u0437\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435\u043c \u043d\u0430 \u0434\u0430\u043d\u043d\u044b\u0435 \u0432 \u0440\u0430\u0437\u0434\u0435\u043b\u044f\u0435\u043c\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 (shmem \/ […]<\/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-104822","post","type-post","status-publish","format-standard","hentry","category-news"],"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\u00ebsi n\u00eb kernelin Linux q\u00eb lejon ndryshimin e p\u00ebrmbajtjes s\u00eb tmpfs dhe memories s\u00eb p\u00ebrbashk\u00ebt | ProHoster","description":"N\u00eb kernelin Linux \u00ebsht\u00eb zbuluar nj\u00eb dob\u00ebsi (CVE-2022-2590) q\u00eb i lejon nj\u00eb p\u00ebrdoruesi pa privilegje t\u00eb ndryshoj\u00eb skedar\u00ebt e mapuar n\u00eb memorie (mmap) dhe skedar\u00ebt n\u00eb tmpfs pa pasur t\u00eb drejta shkrimi mbi to, si edhe t\u00eb rris\u00eb privilegjet e veta n\u00eb.","canonical_url":"https:\/\/prohoster.info\/sq\/blog\/news\/uyazvimost-v-yadre-linux-pozvolyayushhaya-izmenit-soderzhimoe-tmpfs-i-razdelyaemoj-pamyati","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\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 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