{"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\/hr\/blog\/news\/qubes-os-vulnerability-allows-isolation-bypass-and-code-execution-in-dom0","title":{"rendered":"Ranjivost u OS Qubes koja omogu\u0107ava zaobila\u017eenje izolacije i izvr\u0161avanje koda na razini Dom0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Objavljena je informacija o ranjivosti u operativnom sustavu Qubes, koji koristi hipervizor za strogu izolaciju aplikacija i komponenata OS-a (svaka klasa aplikacija i sistemske usluge rade u odvojenim virtualnim ma\u0161inama). Ako napada\u010d kompromitira jednu od virtualnih ma\u0161ina, ranjivost omogu\u0107uje zaobila\u017eenje izolacije, izvr\u0161avanje proizvoljnih komandi u doma\u0107em okru\u017eenju (Dom0) i dobijanje kontrole nad cijelim operativnim sustavom. Problem se javlja kada korisnik koristi alat 'qvm-copy-to-vm' za kopiranje datoteke iz doma\u0107eg okru\u017eenja u virtualnu ma\u0161inu pod kontrolom napada\u010da. Ranjivost je ispravljena u a\u017euriranju paketa qubes-core-dom0-linux 4.3.22. <\/p>\n

Problem se pojavljuje u alatu 'qvm-copy-to-vm' i uzrokovan je nepravilnim rukovanjem gre\u0161kama koje se vra\u0107aju prilikom pristupa virtualnoj ma\u0161ini<\/a>. Su\u0161tina ranjivosti je u tome \u0161to alat qvm-copy-to-vm za prikazivanje informacije o gre\u0161ci pokre\u0107e programe kdialog ili zenity koriste\u0107i funkciju system() i ubacuju\u0107i informacije o neuspje\u0161nom kopiranju datoteke u opcijama komandne linije. U tom procesu \u010di\u0161\u0107enje naziva datoteke ograni\u010deno je na uklanjanje ne-ASCII znakova i dvostrukih navodnika bez provjere prisutnosti specijalnih znakova koje interpretira komandna ljuska, kao \u0161to su '`' i '$'. <\/p>\n

Nakon zavr\u0161etka kopiranja datoteka iz doma\u0107eg sistema, obrada na strani virtualne ma\u0161ine vra\u0107a potvrdu operacije, u kojoj se izme\u0111u ostalog navodi naziv posljednje primljene datoteke. Napad se svodi na vra\u0107anje koda gre\u0161ke umjesto potvrde, uz navo\u0111enje imena datoteke koja nije mogla biti kopirana, uklju\u010duju\u0107i specijalne znakove koji se obra\u0111uju u komandnom interpretoru. Nakon primanja gre\u0161ke, obrada na strani doma\u0107eg okru\u017eenja pokrenut \u0107e alat za prikaz dijaloga s tekstom gre\u0161ke koriste\u0107i komandu system() i proslijediti vra\u0107eno ime datoteke (na primjer, ako se navede 'file`id`', na strani doma\u0107eg okru\u017eenja pokrenut \u0107e se komanda id).
\n
Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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