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Amazon Linux 2023: CVE-2024-32462: Important priority package update for flatpak

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Amazon Linux 2023: CVE-2024-32462: Important priority package update for flatpak

Severity
6
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:N)
Published
04/18/2024
Created
02/14/2025
Added
02/14/2025
Modified
02/14/2025

Description

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. in versions before 1.10.9, 1.12.9, 1.14.6, and 1.15.8, a malicious or compromised Flatpak app could execute arbitrary code outside its sandbox. Normally, the `--command` argument of `flatpak run` expects to be given a command to run in the specified Flatpak app, optionally along with some arguments. However it is possible to instead pass `bwrap` arguments to `--command=`, such as `--bind`. It's possible to pass an arbitrary `commandline` to the portal interface `org.freedesktop.portal.Background.RequestBackground` from within a Flatpak app. When this is converted into a `--command` and arguments, it achieves the same effect of passing arguments directly to `bwrap`, and thus can be used for a sandbox escape. The solution is to pass the `--` argument to `bwrap`, which makes it stop processing options. This has been supported since bubblewrap 0.3.0. All supported versions of Flatpak require at least that version of bubblewrap. xdg-desktop-portal version 1.18.4 will mitigate this vulnerability by only allowing Flatpak apps to create .desktop files for commands that do not start with --. The vulnerability is patched in 1.15.8, 1.10.9, 1.12.9, and 1.14.6. A flaw was found in Flatpak, a system for building, distributing, and running sandboxed desktop applications on Linux. Normally, the "--command" argument of "flatpak run" expects being given a command to run in the specified Flatpak app, along with optional arguments. However, it is possible to pass bwrap arguments to "--command=" instead, such as "--bind". It is possible to pass an arbitrary "commandline" to the portal interface "org.freedesktop.portal.Background.RequestBackground" within the Flatpak app. This is normally safe because it can only specify a command that exists inside the sandbox. When a crafted "commandline" is converted into a "--command" and arguments, the app could achieve the same effect of passing arguments directly to bwrap to achieve sandbox escape.

Solution(s)

  • amazon-linux-2023-upgrade-flatpak
  • amazon-linux-2023-upgrade-flatpak-debuginfo
  • amazon-linux-2023-upgrade-flatpak-debugsource
  • amazon-linux-2023-upgrade-flatpak-devel
  • amazon-linux-2023-upgrade-flatpak-libs
  • amazon-linux-2023-upgrade-flatpak-libs-debuginfo
  • amazon-linux-2023-upgrade-flatpak-selinux
  • amazon-linux-2023-upgrade-flatpak-session-helper
  • amazon-linux-2023-upgrade-flatpak-session-helper-debuginfo
  • amazon-linux-2023-upgrade-flatpak-tests
  • amazon-linux-2023-upgrade-flatpak-tests-debuginfo

References

  • https://attackerkb.com/topics/cve-2024-32462
  • CVE - 2024-32462
  • https://alas.aws.amazon.com/AL2023/ALAS-2024-611.html
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