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Ubuntu: (Multiple Advisories) (CVE-2021-4120): snapd regression

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Ubuntu: (Multiple Advisories) (CVE-2021-4120): snapd regression

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
02/17/2022
Created
03/25/2022
Added
02/18/2022
Modified
03/28/2022

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

Solution(s)

  • ubuntu-upgrade-snap-confine
  • ubuntu-upgrade-snapd

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