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ALSA-2022:1792 — Moderate: flatpak security and bug fix update

Affected: AlmaLinux:8: flatpak, AlmaLinux:8: flatpak-devel, AlmaLinux:8: flatpak-libs, AlmaLinux:8: flatpak-selinux, AlmaLinux:8: flatpak-session-helper

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.

Security Fix(es):

* flatpak: Permissions granted to applications can be hidden from the user at install time (CVE-2021-43860)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

CLEANSTART-2024-YF10316 — Flatpak is a Linux application sandboxing and distribution framework

Affected: CleanStart: flatpak

Security vulnerability affects the flatpak package. Flatpak is a Linux application sandboxing and distribution framework.

EUVD-2026-32751

fkie_cve-2021-43860

Flatpak is a Linux application sandboxing and distribution framework. Prior to versions 1.12.3 and 1.10.6, Flatpak doesn't properly validate that the permissions displayed to the user for an app at install time match the actual permissions granted to the app at runtime, in the case that there's a null byte in the metadata file of an app. Therefore apps can grant themselves permissions without the consent of the user. Flatpak shows permissions to the user during install by reading them from the "xa.metadata" key in the commit metadata. This cannot contain a null terminator, because it is an untrusted GVariant. Flatpak compares these permissions to the *actual* metadata, from the "metadata" file to ensure it wasn't lied to. However, the actual metadata contents are loaded in several places where they are read as simple C-style strings. That means that, if the metadata file includes a null terminator, only the content of the file from *before* the terminator gets compared to xa.metadata. Thus, any permissions that appear in the metadata file after a null terminator are applied at runtime but not shown to the user. So maliciously crafted apps can give themselves hidden permissions. Users who have Flatpaks installed from untrusted sources are at risk in case the Flatpak has a maliciously crafted metadata file, either initially or in an update. This issue is patched in versions 1.12.3 and 1.10.6. As a workaround, users can manually check the permissions of installed apps by checki…

gsd-2021-43860

OESA-2022-1520 — flatpak security update

Affected: openEuler:20.03-LTS-SP1: flatpak, openEuler:20.03-LTS-SP2: flatpak, openEuler:20.03-LTS-SP3: flatpak

Application deployment framework for desktop apps. Security Fix(es): Flatpak is a Linux application sandboxing and distribution framework. Prior to versions 1.12.3 and 1.10.6, Flatpak doesn't properly validate that the permissions displayed to the user for an app at install time match the actual permissions granted to the app at runtime, in the case that there's a null byte in the metadata file of an app. Therefore apps can grant themselves permissions without the consent of the user. Flatpak shows permissions to the user during install by reading them from the "xa.metadata" key in the commit metadata. This cannot contain a null terminator, because it is an untrusted GVariant. Flatpak compares these permissions to the *actual* metadata, from the "metadata" file to ensure it wasn't lied to. However, the actual metadata contents are loaded in several places where they are read as simple C-style strings. That means that, if the metadata file includes a null terminator, only the content of the file from *before* the terminator gets compared to xa.metadata. Thus, any permissions that appear in the metadata file after a null terminator are applied at runtime but not shown to the user. So maliciously crafted apps can give themselves hidden permissions. Users who have Flatpaks installed from untrusted sources are at risk in case the Flatpak has a maliciously crafted metadata file, either initially or in an update. This issue is patched in ver…

openSUSE-SU-2022:0712-1 — Security update for flatpak

Security update for flatpak

SUSE-SU-2022:0712-1 — Security update for flatpak

Security update for flatpak

UBUNTU-CVE-2021-43860

Affected: Ubuntu:Pro:18.04:LTS: flatpak, Ubuntu:Pro:20.04:LTS: flatpak, Ubuntu:Pro:22.04:LTS: flatpak

WID-SEC-W-2022-1447 — Red Hat Enterprise Linux (flatpak): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux in flatpak ausnutzen, um Sicherheitsvorkehrungen zu umgehen.