A Flatpak security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.04, and 21.10.
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Ubuntu Security Notice USN-5191-1
December 14, 2021
flatpak vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
A system hardening measure could be bypassed.
Software Description:
- 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:
flatpak 1.10.2-3ubuntu0.1
libflatpak0 1.10.2-3ubuntu0.1
Ubuntu 21.04:
flatpak 1.10.2-1ubuntu1.1
libflatpak0 1.10.2-1ubuntu1.1
Ubuntu 20.04 LTS:
flatpak 1.6.5-0ubuntu0.4
libflatpak0 1.6.5-0ubuntu0.4
Ubuntu 18.04 LTS:
flatpak 1.0.9-0ubuntu0.4
libflatpak0 1.0.9-0ubuntu0.4
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5191-1
CVE-2021-41133
Package Information:
https://launchpad.net/ubuntu/+source/flatpak/1.10.2-3ubuntu0.1
https://launchpad.net/ubuntu/+source/flatpak/1.10.2-1ubuntu1.1
https://launchpad.net/ubuntu/+source/flatpak/1.6.5-0ubuntu0.4
https://launchpad.net/ubuntu/+source/flatpak/1.0.9-0ubuntu0.4
