{"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\/sv\/blog\/news\/qubes-os-vulnerability-allows-isolation-bypass-and-code-execution-in-dom0","title":{"rendered":"S\u00e5rbarhet i Qubes OS som m\u00f6jligg\u00f6r omdirigering av isolering och k\u00f6rning av kod p\u00e5 Dom0-niv\u00e5","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Information has been published about a vulnerability in the Qubes operating system, which uses a hypervisor for strict isolation of applications and OS components (each class of applications and system services operates in separate virtual machines). If an attacker compromises one of the virtual machines, the vulnerability allows bypassing the isolation, executing arbitrary commands on the host environment (Dom0), and gaining control over the entire operating system. The issue arises when a user utilizes the utility «qvm-copy-to-vm» to copy a file from the host environment to a virtual machine controlled by the attacker. The vulnerability has been patched in the update for the qubes-core-dom0-linux package version 4.3.22. <\/p>\n

The problem exists in the «qvm-copy-to-vm» utility and is caused by improper error handling returned when accessing en virtuell maskin<\/a>. The essence of the vulnerability is that the qvm-copy-to-vm utility executed the programs kdialog or zenity to display error information by using the system() function, injecting the details of the unsuccessfully copied file as options in the command line. The cleaning of the file name was limited to removing non-ASCII characters and double quotes without checking for the presence of special characters interpreted by the command shell, such as «`» and «$». <\/p>\n

After the file copying from the host system is completed, the handler on the virtual machine side sends back an operation confirmation, which includes the name of the last received file. The attack involves returning an error code instead of a confirmation and specifying a file name with special characters processed by the command interpreter for the file that failed to copy. Upon receiving the error, the handler on the host environment will execute a command using system() to launch the utility to display a dialog with the error text, passing the file name returned by the attacker in the command line (for example, when specifying «file`id`», the id command will be executed on the host environment).
\n
K\u00e4lla: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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