TIOCLINUX can send commands outside sandbox if running on a virtual console

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Versions prior to 1.10.8, 1.12.8, 1.14.4, and 1.15.4 contain a vulnerability similar to CVE-2017-5226, but using the `TIOCLINUX` ioctl command instead of `TIOCSTI`. If a Flatpak app is run on a Linux virtual console such as `/dev/tty1`, it can copy text from the virtual console and paste it into the command buffer, from which the command might be run after the Flatpak app has exited. Ordinary graphical terminal emulators like xterm, gnome-terminal and Konsole are unaffected. This vulnerability is specific to the Linux virtual consoles `/dev/tty1`, `/dev/tty2` and so on. A patch is available in versions 1.10.8, 1.12.8, 1.14.4, and 1.15.4. As a workaround, don't run Flatpak on a Linux virtual console. Flatpak is primarily designed to be used in a Wayland or X11 graphical environment.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

输入验证不恰当

Flatpak 输入验证错误漏洞

Flatpak是一套用于Linux桌面应用计算机环境的应用程序虚拟化系统。 Flatpak 1.10.8之前版本、1.12.x版本至1.12.8版本、1.14.x版本至1.14.4版本、1.15.x版本至1.15.4版本存在输入验证错误漏洞。攻击者利用该漏洞从虚拟控制台复制文本并将其粘贴到命令缓冲区中，在Flatpak应用程序退出后可能会从中运行命令。

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