Permissions, Privileges, and Access Controls in Flatpak - CVE-2021-43860
Published: January 17, 2022 / Updated: February 3, 2022
Vulnerability identifier: #VU59654
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-43860
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Flatpak
Affected software:
Flatpak
Flatpak
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly validate that the permissions displayed to the user for an app at install time match the actual permissions granted to the app at runtime, which leads to security restrictions bypass and privilege escalation.
How to mitigate CVE-2021-43860
Install updates from vendor's website.
Sources
- https://github.com/flatpak/flatpak/commit/d9a8f9d8ccc0b7c1135d0ecde006a75d25f66aee
- https://github.com/flatpak/flatpak/commit/65cbfac982cb1c83993a9e19aa424daee8e9f042
- https://github.com/flatpak/flatpak/commit/93357d357119093804df05acc32ff335839c6451
- https://github.com/flatpak/flatpak/commit/ba818f504c926baaf6e362be8159cfacf994310e
- https://github.com/flatpak/flatpak/security/advisories/GHSA-qpjc-vq3c-572j
- https://github.com/flatpak/flatpak/commit/54ec1a482dfc668127eaae57f135e6a8e0bc52da
- https://github.com/flatpak/flatpak/releases/tag/1.12.3
- https://github.com/flatpak/flatpak/releases/tag/1.10.6
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APFTBYGJJVJPFVHRXUW5PII5XOAFI4KH/
- https://github.com/flatpak/flatpak/releases/tag/1.8.7