Privilege escalation in flatpak



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-41133
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Flatpak
Server applications / Frameworks for developing and running applications

Vendor Flatpak

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Security restrictins bypass

EUVDB-ID: #VU57176

Risk: Low

CVSSv4.0: 5.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-41133

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an error in the VFS-manipulating syscalls implementation. A local user can bypass sandbox restrictions and escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Flatpak: 1.8.0 - 1.12.0

CPE2.3 External links

https://github.com/flatpak/flatpak/releases/tag/1.12.1
https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q
https://github.com/flatpak/flatpak/releases/tag/1.10.5


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.



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