CVE-2023-28100

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.

Bugs

• <https://bugs.launchpad.net/ubuntu/+source/flatpak/+bug/2063035&gt;