Vulnerability CVE-2021-4120: Information
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
Severity: HIGH (7.8) Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| snapd | sisyphus | 2.54.3-alt1 | 2.61.3-alt1.1 | ALT-PU-2022-1345-1 | 295710 | Fixed |
| snapd | p10 | 2.54.3-alt1 | 2.56-alt1 | ALT-PU-2022-1765-1 | 299035 | Fixed |
| snapd | c10f1 | 2.54.3-alt1 | 2.56-alt1 | ALT-PU-2022-1765-1 | 299035 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| https://ubuntu.com/security/notices/USN-5292-1 |
|
| FEDORA-2022-5df8b52ba4 | |
| FEDORA-2022-82bea71e5a | |
| [oss-security] 20220218 CVE-2021-4120: Insufficient validation of snap content interface and layout paths |
|
| https://bugs.launchpad.net/snapd/+bug/1949368 |
|