#VU73835 Input validation error in Flatpak - CVE-2023-28100

Vulnerability identifier: #VU73835

Vulnerability risk: Low

CVSSv4.0: 3.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-28100

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Flatpak
Server applications / Frameworks for developing and running applications

Vendor: Flatpak

Description

The vulnerability allows a malicious application to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input when handling copy/paste operations. 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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Flatpak: 0.1 - 0.99.3, 1.0.0 - 1.0.9, 1.1.0 - 1.15.3, 1.2.0 - 1.2.5, 1.3.0 - 1.3.4, 1.4.0 - 1.4.4, 1.5.0 - 1.5.2, 1.6.0 - 1.6.5, 1.7.1 - 1.7.3, 1.8.0 - 1.8.7, 1.9.1 - 1.9.3

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External links
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

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.