#VU32022 Security features bypass in Flatpak - CVE-2019-10063

Vulnerability identifier: #VU32022

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10063

CWE-ID: CWE-254

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 bypass implemented security restrictions.

The vulnerability exists due to improper input validation. If Flatpak runs from a terminal emulator containing an interactive shell, a malicious Flatpak app could inject input into the interactive shell by using the TIOCSTI ioctl.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Flatpak: 1.0.0 - 1.0.7, 1.2.0 - 1.2.3

---

External links
https://access.redhat.com/errata/RHSA-2019:1024
https://access.redhat.com/errata/RHSA-2019:1143
https://github.com/flatpak/flatpak/issues/2782
https://github.com/flatpak/flatpak/security/advisories/GHSA-7gfv-rvfx-h87x

---

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.