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CVE-2021-4120

Publication date 17 February 2022

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.2 · High

Score breakdown

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

Status

Package Ubuntu Release Status
snapd 21.10 impish
Fixed 2.54.3+21.10.1
21.04 hirsute Ignored end of life
20.04 LTS focal
Fixed 2.54.3+20.04
18.04 LTS bionic
Fixed 2.54.3+18.04
16.04 LTS xenial
14.04 LTS trusty

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Severity score breakdown

Parameter Value
Base score 8.2 · High
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction Required
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-5292-1
    • snapd vulnerabilities
    • 17 February 2022
    • USN-5292-2
    • snapd vulnerabilities
    • 18 February 2022
    • USN-5292-3
    • snapd vulnerabilities
    • 18 February 2022

Other references