Bug 2179220 (CVE-2023-28100)

Summary:	CVE-2023-28100 flatpak: TIOCLINUX can send commands outside sandbox if running on a virtual console
Product:	[Other] Security Response	Reporter:	Sandipan Roy <saroy>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	debarshir
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Flatpak, a system for building, distributing, and running sandboxed desktop applications on Linux. It contains a vulnerability similar to CVE-2017-5226 but using the `TIOCLINUX` ioctl command instead of `TIOCSTI.` If a Flatpak app is run on a Linux virtual console such as `/dev/tty1`, it can copy text from the virtual console and paste it into the command buffer, from which the command might be run after the Flatpak app has exited. Ordinary graphical terminal emulators like xterm, gnome-terminal, and Konsole are unaffected. This vulnerability is specific to the Linux virtual consoles `/dev/tty1`, `/dev/tty2`, and others.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2179221, 2179222, 2180311, 2180312
Bug Blocks:	2179174

Description Sandipan Roy 2023-03-17 05:05:05 UTC

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Versions prior to 1.10.8, 1.12.8, 1.14.4, and 1.15.4 contain a vulnerability similar to CVE-2017-5226, but using the `TIOCLINUX` ioctl command instead of `TIOCSTI`. If a Flatpak app is run on a Linux virtual console such as `/dev/tty1`, it can copy text from the virtual console and paste it into the command buffer, from which the command might be run after the Flatpak app has exited. Ordinary graphical terminal emulators like xterm, gnome-terminal and Konsole are unaffected. This vulnerability is specific to the Linux virtual consoles `/dev/tty1`, `/dev/tty2` and so on. A patch is available in versions 1.10.8, 1.12.8, 1.14.4, and 1.15.4. As a workaround, don't run Flatpak on a Linux virtual console. Flatpak is primarily designed to be used in a Wayland or X11 graphical environment.

https://github.com/flatpak/flatpak/security/advisories/GHSA-7qpw-3vjv-xrqp
https://github.com/flatpak/flatpak/commit/8e63de9a7d3124f91140fc74f8ca9ed73ed53be9
https://marc.info/?l=oss-security&m=167879021709955&w=2

Comment 1 Sandipan Roy 2023-03-17 05:06:42 UTC

Created flatpak tracking bugs for this issue:

Affects: fedora-36 [bug 2179221]
Affects: fedora-37 [bug 2179222]

Comment 4 errata-xmlrpc 2023-11-07 08:18:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6518 https://access.redhat.com/errata/RHSA-2023:6518

Comment 5 errata-xmlrpc 2023-11-14 15:19:13 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:7038 https://access.redhat.com/errata/RHSA-2023:7038