CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
AI Score
Confidence
Low
EPSS
Percentile
13.0%
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.
www.openwall.com/lists/oss-security/2024/04/18/5
github.com/flatpak/flatpak/commit/72016e3fce8fcbeab707daf4f1a02b931fcc004d
github.com/flatpak/flatpak/commit/81abe2a37d363f5099c3d0bdcd0caad6efc5bf97
github.com/flatpak/flatpak/commit/b7c1a558e58aaeb1d007d29529bbb270dc4ff11e
github.com/flatpak/flatpak/commit/bbab7ed1e672356d1a78b422462b210e8e875931
github.com/flatpak/flatpak/security/advisories/GHSA-phv6-cpc2-2fgj
lists.fedoraproject.org/archives/list/[email protected]/message/IB6VQAF5S2YOBULDHPUKPOEIKONOP5KO/
lists.fedoraproject.org/archives/list/[email protected]/message/ZFNSCFJVMAQK5AF55JBN7OSJP3CREDBD/