CVE-2024-32462

high

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.

References

https://lists.fedoraproject.org/archives/list/[email protected]/message/ZFNSCFJVMAQK5AF55JBN7OSJP3CREDBD/

https://lists.fedoraproject.org/archives/list/[email protected]/message/IB6VQAF5S2YOBULDHPUKPOEIKONOP5KO/

https://github.com/flatpak/flatpak/security/advisories/GHSA-phv6-cpc2-2fgj

https://github.com/flatpak/flatpak/security/advisories/GHSA-phv6-cpc2-2fgj

https://github.com/flatpak/flatpak/commit/bbab7ed1e672356d1a78b422462b210e8e875931

https://github.com/flatpak/flatpak/commit/bbab7ed1e672356d1a78b422462b210e8e875931

https://github.com/flatpak/flatpak/commit/b7c1a558e58aaeb1d007d29529bbb270dc4ff11e

https://github.com/flatpak/flatpak/commit/b7c1a558e58aaeb1d007d29529bbb270dc4ff11e

https://github.com/flatpak/flatpak/commit/81abe2a37d363f5099c3d0bdcd0caad6efc5bf97

https://github.com/flatpak/flatpak/commit/81abe2a37d363f5099c3d0bdcd0caad6efc5bf97

https://github.com/flatpak/flatpak/commit/72016e3fce8fcbeab707daf4f1a02b931fcc004d

https://github.com/flatpak/flatpak/commit/72016e3fce8fcbeab707daf4f1a02b931fcc004d

http://www.openwall.com/lists/oss-security/2024/04/18/5

Details

Source: Mitre, NVD

Published: 2024-04-18

Updated: 2024-05-01

Risk Information

CVSS v2

Base Score: 6.2

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 8.4

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Severity: High