Directory Traversal Affecting flatpak-zsh-completion package, versions <1.10.7-4.12.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
1.68% (75th percentile)

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  • Snyk IDSNYK-SLES152-FLATPAKZSHCOMPLETION-2641682
  • published14 Apr 2022
  • disclosed4 Mar 2022

Introduced: 4 Mar 2022

CVE-2022-21682  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade SLES:15.2 flatpak-zsh-completion to version 1.10.7-4.12.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream flatpak-zsh-completion package and not the flatpak-zsh-completion package as distributed by SLES. See How to fix? for SLES:15.2 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1