cbcvebase.
CVE-2022-21682
published 2022-01-13

CVE-2022-21682: Flatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6…

medium6.5CVSS 3.1
AVNACLPRLUINSUCNIHAN
Flatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6. flatpak-builder applies `finish-args` last in the build. At this point the build directory will have the full access that is specified in the manifest, so running `flatpak build` against it will gain those permissions. Normally this will not be done, so this is not problem. However, if `--mirror-screenshots-url` is specified, then flatpak-builder will launch `flatpak build --nofilesystem=host appstream-utils mirror-screenshots` after finalization, which can lead to issues even with the `--nofilesystem=host` protection. In normal use, the only issue is that these empty directories can be created wherever the user has write permissions. However, a malicious application could replace the `appstream-util` binary and potentially do something more hostile. This has been resolved in Flatpak 1.12.3 and 1.10.6 by changing the behaviour of `--nofilesystem=home` and `--nofilesystem=host`.

Affected

15 ranges
VendorProductVersion rangeFixed in
debiandebian_linux
debiandebian_linux
debiandebian_linux
debianflatpak< flatpak 1.12.3-1 (bookworm)flatpak 1.12.3-1 (bookworm)
fedoraprojectfedora
flatpakflatpak< 1.10.61.10.6
flatpakflatpak< 1.10.71.10.7
flatpakflatpak
flatpakflatpak>= 0 < 1.10.7-0+deb11u11.10.7-0+deb11u1
flatpakflatpak>= 0 < 1.12.3-11.12.3-1
flatpakflatpak>= 0 < 1.12.3-11.12.3-1
flatpakflatpak>= 0 < 1.12.3-11.12.3-1
flatpakflatpak>= 1.11.1 < 1.12.41.12.4
flatpakflatpak-builder< 1.2.21.2.2
redhatenterprise_linux

CVSS provenance

nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
osv6.5MEDIUM