{"id":103146,"date":"2022-01-31T15:36:54","date_gmt":"2022-01-31T13:36:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-mehanizme-ucount-yadra-linux-pozvolyayushhaya-povysit-svoi-privilegii"},"modified":"2022-01-31T15:36:54","modified_gmt":"2022-01-31T13:36:54","slug":"uyazvimost-v-mehanizme-ucount-yadra-linux-pozvolyayushhaya-povysit-svoi-privilegii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/uyazvimost-v-mehanizme-ucount-yadra-linux-pozvolyayushhaya-povysit-svoi-privilegii","title":{"rendered":"Vulnerabilitet n\u00eb mekanizmin ucount t\u00eb b\u00ebrtham\u00ebs Linux, i cili lejon rritjen e privilegjeve personale.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00eb b\u00ebrtham\u00ebn e Linux-it, n\u00eb kodin e trajtimit t\u00eb kufizimeve rlimit n\u00eb hap\u00ebsira em\u00ebrtimi t\u00eb identifikuesve t\u00eb p\u00ebrdoruesve (user namespaces) \u00ebsht\u00eb zbuluar nj\u00eb dob\u00ebsi (CVE-2022-24122) q\u00eb lejon rritjen e privilegjeve t\u00eb p\u00ebrdoruesve n\u00eb sistem. Problemi shfaqet q\u00eb nga b\u00ebrthama Linux 5.14 dhe do t\u00eb rregullohet n\u00eb p\u00ebrdit\u00ebsimet 5.16.5 dhe 5.15.19. Deg\u00ebt stabile t\u00eb Debian, Ubuntu, SUSE\/openSUSE dhe RHEL nuk preken, por problemi shfaqet n\u00eb b\u00ebrthamat e reja t\u00eb Fedora dhe Arch Linux. <\/p>\n

Nj\u00eb gabim u regjistrua n\u00eb ndryshimin e b\u00ebr\u00eb ver\u00ebn e vitit 2021, q\u00eb kalonte zbatimin e disa num\u00ebruesve RLIMIT p\u00ebr t\u00eb p\u00ebrdorur struktur\u00ebn \"ucounts\". Objekti \"ucounts\" i krijuar p\u00ebr RLIMIT vazhdoi t\u00eb p\u00ebrdorej pas \u00e7lirimit t\u00eb memories s\u00eb alokuar p\u00ebr t\u00eb (use-after-free) gjat\u00eb fshirjes s\u00eb hap\u00ebsir\u00ebs s\u00eb lidhur me t\u00eb, gj\u00eb q\u00eb lejonte ekzekutimin e kodit t\u00eb tij n\u00eb nivelin e b\u00ebrtham\u00ebs. <\/p>\n

Eksplorimi i dob\u00ebsis\u00eb nga nj\u00eb p\u00ebrdorues jo privilegjuar \u00ebsht\u00eb i mundur vet\u00ebm n\u00ebse \u00ebsht\u00eb aktivizuar n\u00eb sistem qasje jo privilegjuar n\u00eb hap\u00ebsir\u00ebn em\u00ebrtimore t\u00eb identifikuesve t\u00eb p\u00ebrdoruesve (unprivileged user namespace), q\u00eb \u00ebsht\u00eb aktivizuar si parazgjedhje n\u00eb Ubuntu dhe Fedora, por nuk \u00ebsht\u00eb aktivizuar n\u00eb Debian dhe RHEL. Si nj\u00eb zgjidhje p\u00ebr t\u00eb bllokuar dob\u00ebsin\u00eb, mund t\u00eb \u00e7aktivizohet qasja jo privilegjuar n\u00eb user namespace: sysctl -w kernel.unprivileged_userns_clone=0
\n
Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u044f\u0434\u0440\u0435 Linux \u0432 \u043a\u043e\u0434\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 rlimit \u0432 \u0440\u0430\u0437\u043d\u044b\u0445 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430\u0445 \u0438\u043c\u0451\u043d \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u0432 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 (user namespaces) \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-24122), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u0432\u044b\u0441\u0438\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\u0440\u043e\u0431\u043b\u0435\u043c\u0430 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