CVE ID:	CVE-2021-4120
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
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-4120 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ https://bugs.launchpad.net/snapd/+bug/1949368 https://bugs.launchpad.net/snapd/+bug/1949368 https://ubuntu.com/security/notices/USN-5292-1 https://ubuntu.com/security/notices/USN-5292-1 http://www.openwall.com/lists/oss-security/2022/02/18/2