VULNERABILITY INTELLIGENCE
CVE-2021-4120
CVSS score8.2 HIGH
EPSS probability0.44%
CISA KEVNot currently listed
Published2022-02-17
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Description
snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
Weakness classification
- security@ubuntu.com: CWE-20
- nvd@nist.gov: CWE-20
Primary references
- security@ubuntu.com — Exploit, Mailing List, Third Party Advisory
- security@ubuntu.com — Exploit, Issue Tracking, Third Party Advisory
- security@ubuntu.com
- security@ubuntu.com
- security@ubuntu.com — Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory