USN-5191-1: Flatpak vulnerability

Releases

• Ubuntu 21.10
• Ubuntu 21.04
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• flatpak - Application deployment framework for desktop apps

Details

It was discovered that Flatpak incorrectly handled certain AF_UNIX sockets.
An attacker could use this to specially craft a Flatpak application that
could escape sandbox confinement.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.10

• libflatpak0 - 1.10.2-3ubuntu0.1
• flatpak - 1.10.2-3ubuntu0.1

Ubuntu 21.04

• libflatpak0 - 1.10.2-1ubuntu1.1
• flatpak - 1.10.2-1ubuntu1.1

Ubuntu 20.04

• libflatpak0 - 1.6.5-0ubuntu0.4
• flatpak - 1.6.5-0ubuntu0.4

Ubuntu 18.04

• libflatpak0 - 1.0.9-0ubuntu0.4
• flatpak - 1.0.9-0ubuntu0.4

In general, a standard system update will make all the necessary changes.

References

• CVE-2021-41133