Nel kernel Linux sono state scoperte due vulnerabilit\u00e0 (CVE-2023-1281, CVE-2023-1829) che consentono a un utente locale di elevare i propri privilegi all'interno del sistema. Per eseguire l'attacco sono necessarie le autorizzazioni per creare e modificare classificatori di traffico, disponibili con i diritti CAP_NET_ADMIN, che possono essere ottenuti attraverso la creazione di spazi dei nomi degli identificatori utente (user namespace). I problemi si manifestano a partire dal kernel 4.14 e sono stati risolti nella versione 6.2. <\/p>\n
Le vulnerabilit\u00e0 sono causate dall'accesso alla memoria dopo che \u00e8 stata liberata (use-after-free) nel codice del classificatore di traffico tcindex, parte del sottosistema QoS (Quality of service) del kernel Linux. La prima vulnerabilit\u00e0 si verifica a causa di una condizione di gara durante l'aggiornamento di filtri hash non ottimali, mentre la seconda vulnerabilit\u00e0 si verifica durante la rimozione di un filtro hash ottimale. \u00c8 possibile seguire le correzioni nelle distribuzioni sulle seguenti pagine: Debian, Ubuntu, Gentoo, RHEL, SUSE, Fedora, Gentoo, Arch. Per bloccare l'esploitazione della vulnerabilit\u00e0 in modo alternativo, \u00e8 possibile disattivare la creazione di spazi dei nomi da parte di utenti non privilegiati (\"sudo sysctl -w kernel.unprivileged_userns_clone=0\"). \u0412 \u044f\u0434\u0440\u0435 Linux \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2023-1281, CVE-2023-1829), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \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. \u0414\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0442\u0440\u0435\u0431\u0443\u044e\u0442\u0441\u044f \u043f\u043e\u043b\u043d\u043e\u043c\u043e\u0447\u0438\u044f \u043d\u0430 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0438 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043a\u043b\u0430\u0441\u0441\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u0432 \u0442\u0440\u0430\u0444\u0438\u043a\u0430, \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0435 \u043f\u0440\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u043f\u0440\u0430\u0432 CAP_NET_ADMIN, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432 \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\u044f (user namespace). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u044f\u0434\u0440\u0430 4.14 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u0432\u0435\u0442\u043a\u0435 6.2. […]<\/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-107817","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\udd47Vulnerabilit\u00e0 nel sottosistema QoS del kernel Linux che consentono di elevare i propri privilegi all'interno del sistema | ProHoster","description":"Nel kernel Linux sono state scoperte due vulnerabilit\u00e0 (CVE-2023-1281, CVE-2023-1829) che consentono a un utente locale di elevare i propri privilegi all'interno del sistema.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimosti-v-qos-podsisteme-yadra-linux-pozvolyayushhie-podnyat-svoi-privilegii-v-sisteme","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","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\u0438 \u0432 QoS-\u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u044f\u0434\u0440\u0430 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \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 | ProHoster","og:description":"\u0412 \u044f\u0434\u0440\u0435 Linux \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2023-1281, CVE-2023-1829), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \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.","og:url":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimosti-v-qos-podsisteme-yadra-linux-pozvolyayushhie-podnyat-svoi-privilegii-v-sisteme","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2023-04-12T16:48:17+00:00","article:modified_time":"2023-04-13T06:25:12+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/107817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/comments?post=107817"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/107817\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media?parent=107817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/categories?post=107817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/tags?post=107817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"