{"id":120749,"date":"2024-11-28T21:45:59","date_gmt":"2024-11-28T19:45:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-tuned-pozvolyayushhaya-vypolnit-kod-s-pravami-root"},"modified":"2024-11-28T21:45:59","modified_gmt":"2024-11-28T19:45:59","slug":"uyazvimost-v-tuned-pozvolyayushhaya-vypolnit-kod-s-pravami-root","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-tuned-pozvolyayushhaya-vypolnit-kod-s-pravami-root","title":{"rendered":"Hiba a tuned-ben, amely lehet\u0151v\u00e9 teszi a root jogosults\u00e1ggal val\u00f3 k\u00f3dv\u00e9grehajt\u00e1st.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Red Hat \u00e1ltal kifejlesztett h\u00e1tt\u00e9rfolyamatban, a tuned-ben, amely automatikusan optimaliz\u00e1lja a hardver- \u00e9s kernelbe\u00e1ll\u00edt\u00e1sokat a pillanatnyi terhel\u00e9s szerint, egy s\u00e9r\u00fcl\u00e9kenys\u00e9get fedeztek fel (CVE-2024-52336), amely lehet\u0151v\u00e9 teszi a helyi, nem privilegiz\u00e1lt felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra, hogy b\u00e1rmilyen parancsot root jogosults\u00e1ggal hajtsanak v\u00e9gre. <\/p>\n

A probl\u00e9ma a DBus-m\u00f3dszer «com.redhat.tuned.instance_create» megval\u00f3s\u00edt\u00e1s\u00e1ban rejlik, amely p\u00e9ld\u00e1nyok l\u00e9trehoz\u00e1s\u00e1ra szolg\u00e1l\u00f3 pluginekhez haszn\u00e1lhat\u00f3, amelynek param\u00e9terei «script_pre» \u00e9s «script_post» \u00e1tad\u00e1s\u00e1ra alkalmasak a plugin p\u00e9ld\u00e1ny l\u00e9trehoz\u00e1sa el\u0151tt vagy ut\u00e1n v\u00e9grehajtand\u00f3 szkriptek megad\u00e1s\u00e1ra. A probl\u00e9ma abban \u00e1ll, hogy a Polkit be\u00e1ll\u00edt\u00e1sai lehet\u0151v\u00e9 teszik b\u00e1rmely bejelentkezett helyi felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra, hogy hiteles\u00edt\u00e9s n\u00e9lk\u00fcl DBus-k\u00e9r\u00e9st k\u00fcldj\u00f6n ehhez a m\u00f3dszerhez, m\u00edg a tuned folyamat root jogosults\u00e1gokkal fut, \u00e9s a «script_pre» \u00e9s «script_post» param\u00e9terekben megadott szkripteket is root jogokkal ind\u00edtja el. P\u00e9ld\u00e1ul a \/path\/to\/myscript.sh szkript root jogokkal val\u00f3 futtat\u00e1s\u00e1hoz a felhaszn\u00e1l\u00f3nak el\u00e9g csak kiadnia a k\u00f6vetkez\u0151 parancsot: gdbus call -y -d com.redhat.tuned -o \/Tuned \\ -m com.redhat.tuned.control.instance_create cpu myinstance \\ ‘{«script_pre»: «\/path\/to\/myscript.sh», «devices»: «*»}’ <\/p>\n

A DBus-m\u00f3dszer «com.redhat.tuned.instance_create» eset\u00e9ben egy kev\u00e9sb\u00e9 s\u00falyos sebezhet\u0151s\u00e9g is jelen van (CVE-2024-52337), amely a plugin p\u00e9ld\u00e1ny nev\u00e9nek napl\u00f3ba t\u00f6rt\u00e9n\u0151 ki\u00edr\u00e1sa sor\u00e1n fell\u00e9p\u0151 \u00e9rt\u00e9k t\u00f6rl\u00e9s\u00e9nek hi\u00e1ny\u00e1b\u00f3l ered. A t\u00e1mad\u00f3 olyan nevet adhat hozz\u00e1, amely \u00faj sort \u00e9s escape karaktereket tartalmaz a termin\u00e1lemul\u00e1tor sz\u00e1m\u00e1ra, amelyek a napl\u00f3 szerkezet\u00e9nek megs\u00e9rt\u00e9s\u00e9re \u00e9s a «tuned-adm get_instances» parancs kimenet\u00e9nek megjelen\u00edt\u00e9sekor v\u00e9grehajtott m\u0171veletekhez haszn\u00e1lhat\u00f3k. EVIL=`echo -e «this is\nevil\033[?1047h»` gdbus call -y -d com.redhat.tuned -o \/Tuned -m com.redhat.tuned.control.instance_create cpu «$EVIL» ‘{«devices»: «*»}’ <\/p>\n

A s\u00e9r\u00fcl\u00e9kenys\u00e9gek a tuned 2.23-as verzi\u00f3j\u00e1t\u00f3l kezdve jelentkeznek, amely 2024 j\u00fanius\u00e1nak elej\u00e9n k\u00e9sz\u00fclt, \u00e9s a tuned 2.24.1 kiad\u00e1sban jav\u00edtott\u00e1k \u0151ket. A f\u0151bb terjeszt\u00e9sekben az RHEL 9, Fedora 40, Arch Linux \u00e9s Gentoo kiad\u00e1sokban jav\u00edtott\u00e1k a probl\u00e9m\u00e1kat. Az Ubuntu, Debian \u00e9s SUSE\/openSUSE stabil \u00e1gaiban a s\u00e9r\u00fcl\u00e9kenys\u00e9gek nem jelennek meg, mivel ezek r\u00e9gi verzi\u00f3j\u00fa tuned-ot (<2.23) haszn\u00e1lnak, amelyek nem \u00e9rz\u00e9kenyek a s\u00e9r\u00fcl\u00e9kenys\u00e9gekre.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Red Hat \u0444\u043e\u043d\u043e\u0432\u043e\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 tuned, \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u044e\u0449\u0435\u043c \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044e \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u044f\u0434\u0440\u0430 \u0432 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u0438 \u043e\u0442 \u0442\u0435\u043a\u0443\u0449\u0435\u0439 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-52336), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \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 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043b\u044e\u0431\u044b\u0435 \u043a\u043e\u043c\u0430\u043d\u0434\u044b \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 DBus-\u043c\u0435\u0442\u043e\u0434\u0430 «com.redhat.tuned.instance_create», \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u044d\u043a\u0437\u0435\u043c\u043f\u043b\u044f\u0440\u043e\u0432 \u043f\u043b\u0430\u0433\u0438\u043d\u043e\u0432, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u043d\u043e \u043f\u0435\u0440\u0435\u0434\u0430\u0442\u044c \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b «script_pre» \u0438 «script_post» \u0434\u043b\u044f \u0443\u043a\u0430\u0437\u0430\u043d\u0438\u044f \u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0432, […]<\/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-120749","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\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\udd47Biztons\u00e1gi r\u00e9s a tuned-ben, amely lehet\u0151v\u00e9 teszi a k\u00f3d futtat\u00e1s\u00e1t root jogosults\u00e1ggal | ProHoster","description":"A Red Hat \u00e1ltal fejlesztett tuned h\u00e1tt\u00e9rfolyamatban, amely automatikusan optimaliz\u00e1lja a hardver- \u00e9s kernelbe\u00e1ll\u00edt\u00e1sokat az aktu\u00e1lis terhel\u00e9s f\u00fcggv\u00e9ny\u00e9ben, egy biztons\u00e1gi r\u00e9s (CVE-2024-52336) ker\u00fclt felfed\u00e9sre, amely lehet\u0151v\u00e9 teszi.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-tuned-pozvolyayushhaya-vypolnit-kod-s-pravami-root","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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 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\u0432 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u0438 \u043e\u0442 \u0442\u0435\u043a\u0443\u0449\u0435\u0439 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-52336), 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