snapd: snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the abil...
CVE-2021-4120 is fixed in 9 products on 1 platform, first by golang-github-snapcore-snapd-dev 2.54.3+18.04, released February 17, 2022. It is not reported as exploited. Patch Radar priority: High.
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
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| golang-github-snapcore-snapd-dev · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | golang-github-snapcore-snapd-dev 2.54.3+18.04 | Feb 17, 2022 |
| golang-github-snapcore-snapd-dev · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | golang-github-snapcore-snapd-dev 2.54.3+20.04.1 | Feb 17, 2022 |
| golang-github-ubuntu-core-snappy-dev · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | golang-github-ubuntu-core-snappy-dev 2.54.3+18.04 | Feb 17, 2022 |
| golang-github-ubuntu-core-snappy-dev · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | golang-github-ubuntu-core-snappy-dev 2.54.3+20.04.1 | Feb 17, 2022 |
| snap-confine · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | snap-confine 2.54.3+18.04 | Feb 17, 2022 |
| snap-confine · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | snap-confine 2.54.3+20.04.1 | Feb 17, 2022 |
| snapd · Debian 12.15 (bookworm) | 2.54.3-1 | DEBIAN-CVE-2021-4120 | Feb 17, 2022 |
| snapd · Debian 13.5 (trixie) | 2.54.3-1 | DEBIAN-CVE-2021-4120 | Feb 17, 2022 |
| snapd · Debian 14 | 2.54.3-1 | DEBIAN-CVE-2021-4120 | Feb 17, 2022 |
| snapd · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | snapd 2.54.3+18.04 | Feb 17, 2022 |
| snapd · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | snapd 2.54.3+20.04.1 | Feb 17, 2022 |
| snapd-xdg-open · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | snapd-xdg-open 2.54.3+18.04 | Feb 17, 2022 |
| snapd-xdg-open · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | snapd-xdg-open 2.54.3+20.04.1 | Feb 17, 2022 |
| ubuntu-core-launcher · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | ubuntu-core-launcher 2.54.3+18.04 | Feb 17, 2022 |
| ubuntu-core-launcher · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | ubuntu-core-launcher 2.54.3+20.04.1 | Feb 17, 2022 |
| ubuntu-core-snapd-units · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | ubuntu-core-snapd-units 2.54.3+18.04 | Feb 17, 2022 |
| ubuntu-core-snapd-units · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | ubuntu-core-snapd-units 2.54.3+20.04.1 | Feb 17, 2022 |
| ubuntu-snappy · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | ubuntu-snappy 2.54.3+18.04 | Feb 17, 2022 |
| ubuntu-snappy · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | ubuntu-snappy 2.54.3+20.04.1 | Feb 17, 2022 |
| ubuntu-snappy-cli · Ubuntu 18.04.6 LTS (bionic) | 2.54.3+18.04 | ubuntu-snappy-cli 2.54.3+18.04 | Feb 17, 2022 |
| ubuntu-snappy-cli · Ubuntu 20.04 LTS (focal) | 2.54.3+20.04.1 | ubuntu-snappy-cli 2.54.3+20.04.1 | Feb 17, 2022 |
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