{"id":183295,"date":"2026-09-08T22:53:24","date_gmt":"2026-09-08T20:53:24","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/uyazvimost-v-os-qubes-pozvolyayushhaya-obojti-izolyacziyu-i-vypolnit-kod-na-urovne-dom0"},"modified":"2026-09-08T22:53:29","modified_gmt":"2026-09-08T20:53:29","slug":"qubes-os-vulnerability-allows-isolation-bypass-and-code-execution-in-dom0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/qubes-os-vulnerability-allows-isolation-bypass-and-code-execution-in-dom0","title":{"rendered":"Sebezhet\u0151s\u00e9g a Qubes OS-ben, amely lehet\u0151v\u00e9 teszi az elszigetel\u00e9s megker\u00fcl\u00e9s\u00e9t \u00e9s k\u00f3d v\u00e9grehajt\u00e1s\u00e1t a Dom0 szinten","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Megjelent egy hiba\u00fczenet a Qubes oper\u00e1ci\u00f3s rendszerben, amely hipervizort haszn\u00e1l az alkalmaz\u00e1sok \u00e9s az OS komponensek szigor\u00fa elszigetel\u00e9s\u00e9re (minden alkalmaz\u00e1skateg\u00f3ria \u00e9s rendszer- szolg\u00e1ltat\u00e1s k\u00fcl\u00f6n virtu\u00e1lis g\u00e9peken fut). Ha a t\u00e1mad\u00f3 megszerzi az ir\u00e1ny\u00edt\u00e1st egy virtu\u00e1lis g\u00e9p felett, a hiba lehet\u0151v\u00e9 teszi az elszigetel\u00e9s megker\u00fcl\u00e9s\u00e9t, tetsz\u0151leges parancsok v\u00e9grehajt\u00e1s\u00e1t a gazda k\u00f6rnyezet (Dom0) oldal\u00e1n, \u00e9s a teljes oper\u00e1ci\u00f3s rendszer ir\u00e1ny\u00edt\u00e1s\u00e1t. A probl\u00e9ma akkor jelentkezik, amikor a felhaszn\u00e1l\u00f3 az «qvm-copy-to-vm» seg\u00e9dprogramot haszn\u00e1lja f\u00e1jl m\u00e1sol\u00e1s\u00e1ra a gazda k\u00f6rnyezetb\u0151l a t\u00e1mad\u00f3 \u00e1ltal ir\u00e1ny\u00edtott virtu\u00e1lis g\u00e9pbe. A hib\u00e1t a qubes-core-dom0-linux 4.3.22 csomag friss\u00edt\u00e9se jav\u00edtotta. <\/p>\n

A probl\u00e9ma a «qvm-copy-to-vm» seg\u00e9dprogramban tal\u00e1lhat\u00f3, \u00e9s a hib\u00e1k helytelen kezel\u00e9s\u00e9b\u0151l ad\u00f3dik, amelyeket a k\u00f6vetkez\u0151 c\u00edmre t\u00f6rt\u00e9n\u0151 h\u00edv\u00e1sn\u00e1l visszaadnak virtu\u00e1lis g\u00e9pben<\/a>. A hiba l\u00e9nyege, hogy a qvm-copy-to-vm seg\u00e9dprogram a hibainform\u00e1ci\u00f3k megjelen\u00edt\u00e9s\u00e9hez a kdialog vagy zenity programokat h\u00edvta meg a system() f\u00fcggv\u00e9ny haszn\u00e1lat\u00e1val, \u00e9s a hib\u00e1san m\u00e1solt f\u00e1jl adatait opci\u00f3k form\u00e1j\u00e1ban helyezte el a parancssorban. Ek\u00f6zben a f\u00e1jlnevek tiszt\u00edt\u00e1sa a nem-ASCII karakterek \u00e9s a dupla id\u00e9z\u0151jelek elt\u00e1vol\u00edt\u00e1s\u00e1ra korl\u00e1toz\u00f3dott, an\u00e9lk\u00fcl, hogy ellen\u0151rizt\u00e9k volna a speci\u00e1lis karakterek, mint a «`» \u00e9s «$» megl\u00e9t\u00e9t, amelyeket a parancs\u00e9rtelmez\u0151 \u00e9rtelmez. <\/p>\n

A f\u00e1jlok m\u00e1sol\u00e1s\u00e1nak befejez\u00e9se ut\u00e1n a virtu\u00e1lis g\u00e9p oldal\u00e1n l\u00e9v\u0151 kezel\u0151 visszaigazol\u00e1st k\u00fcld az m\u0171veletr\u0151l, amelyben t\u00f6bbek k\u00f6z\u00f6tt az utols\u00f3 megkapott f\u00e1jl neve is szerepel. A t\u00e1mad\u00e1s l\u00e9nyege, hogy ahelyett, hogy meger\u0151s\u00edt\u00e9st \u00e9s a m\u00e1solt f\u00e1jl nev\u00e9t k\u00f6z\u00f6ln\u00e9, amelyben a parancs\u00e9rtelmez\u0151 speci\u00e1lis karakterei vannak, hiba\u00fczenetet ad vissza. A hiba k\u00f3dj\u00e1nak megkap\u00e1sa ut\u00e1n a gazda k\u00f6rnyezet kezel\u0151je a system() parancsot haszn\u00e1lva elind\u00edtja a hibadi\u00e1loz\u00f3t, \u00e9s a t\u00e1mad\u00f3 \u00e1ltal visszaadott f\u00e1jlnevet a parancssorban \u00e1tadja (p\u00e9ld\u00e1ul ha «file`id`» szerepel a gazda k\u00f6rnyezetben, akkor az id parancsot fogja futtatni).
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 Qubes, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0435\u0439 \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440 \u0434\u043b\u044f \u0441\u0442\u0440\u043e\u0433\u043e\u0439 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u041e\u0421 (\u043a\u0430\u0436\u0434\u044b\u0439 \u043a\u043b\u0430\u0441\u0441 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0435 \u0441\u0435\u0440\u0432\u0438\u0441\u044b 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\u043d\u0430 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u0445\u043e\u0441\u0442\u043e\u0432\u043e\u0433\u043e \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f (Dom0) \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043d\u0430\u0434 \u0432\u0441\u0435\u0439 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-183295","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\n","aioseo_head_json":{"title":"\ud83e\udd47A Qubes OS sebezhet\u0151s\u00e9g, amely lehet\u0151v\u00e9 teszi az elszigetelts\u00e9g 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