Name: CVE-2021-4120: Improper Input Validation
Creator: Rapid7
Published: 2022-02-17T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-4120, CWE-20, CVSS 8.2, EPSS 0.00437

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

CVSS Details

CVSS 3.1 Base Score: 8.2
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade snapd	Jul 30, 2024	Feb 17, 2022
Ubuntu	—	Upgrade snapdUpgrade snapd (Ubuntu Pro)Upgrade snap-confineUpgrade snap-confine (Ubuntu Pro)	Feb 18, 2022	Feb 17, 2022

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CVSS Details

Covered by Rapid7

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