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`.
References
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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Configuration 4 (hide)
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History
23 Dec 2023, 10:15
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07 Nov 2023, 03:43
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Information
Published : 2022-01-13 21:15
Updated : 2024-02-28 18:48
NVD link : CVE-2022-21682
Mitre link : CVE-2022-21682
CVE.ORG link : CVE-2022-21682
JSON object : View
Products Affected
debian
- debian_linux
redhat
- enterprise_linux
flatpak
- flatpak
- flatpak-builder
fedoraproject
- fedora
CWE
CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')