[USN-7046-1] Flatpak and Bubblewrap vulnerability

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-7046-1
September 30, 2024

bubblewrap, flatpak vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Flatpak could be made to read and write files in locations it
would not normally have access to.

Software Description:
- bubblewrap: utility for unprivileged chroot and namespace manipulation
- flatpak: Application deployment framework for desktop apps

Details:

It was discovered that Flatpak incorrectly handled certain persisted
directories. An attacker could possibly use this issue to read
and write files in locations it would not normally have access to.
A patch was also needed to Bubblewrap in order to avoid race
conditions caused by this fix.

Update instructions:

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

Ubuntu 24.04 LTS
  bubblewrap                      0.9.0-1ubuntu0.1
  flatpak                         1.14.6-1ubuntu0.1
  libflatpak0                     1.14.6-1ubuntu0.1

Ubuntu 22.04 LTS
  bubblewrap                      0.6.1-1ubuntu0.1
  flatpak                         1.12.7-1ubuntu0.1
  libflatpak0                     1.12.7-1ubuntu0.1

Ubuntu 20.04 LTS
  bubblewrap                      0.4.0-1ubuntu4.1
  flatpak                         1.6.5-0ubuntu0.5
  libflatpak0                     1.6.5-0ubuntu0.5

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

References:
  https://ubuntu.com/security/notices/USN-7046-1
  CVE-2024-42472, https://launchpad.net/bugs/2077087

Package Information:
  https://launchpad.net/ubuntu/+source/bubblewrap/0.9.0-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/flatpak/1.14.6-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/bubblewrap/0.6.1-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/flatpak/1.12.7-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/bubblewrap/0.4.0-1ubuntu4.1
  https://launchpad.net/ubuntu/+source/flatpak/1.6.5-0ubuntu0.5

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