{"id":"CVE-2021-4120","details":"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","modified":"2026-08-27T03:48:39.580147660Z","published":"2022-02-17T23:15:07.550Z","database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"18.04"},{"last_affected":"18.04"},{"introduced":"20.04"},{"last_affected":"20.04"},{"introduced":"21.10"},{"last_affected":"21.10"}],"source":"CPE_STRING","vendor_product":"canonical:ubuntu_linux"},{"vendor_product":"fedoraproject:fedora","cpes":["cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"34"},{"last_affected":"34"},{"introduced":"35"},{"last_affected":"35"}],"source":"CPE_STRING"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/"},{"type":"REPORT","url":"https://bugs.launchpad.net/snapd/+bug/1949368"},{"type":"FIX","url":"https://ubuntu.com/security/notices/USN-5292-1"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2022/02/18/2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/canonical/snapd","events":[{"introduced":"0"},{"last_affected":"f6ff602cae4755eb38d1bbb20fa15752cb3b763a"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"2.54.2"}]}}],"versions":["2.54.2","2.54.1","2.54","untagged-ec50ee5bfb45daefc236","2.15.2","2.15","2.14.2.16.04","2.14.1","2.14","2.13","2.12","2.11","2.0.10","2.0.9","2.0.8","2.0.7","2.0.6","2.0.5","2.0.4","2.0.3","2.0","1.9.4","1.9.3","1.9.2","1.9.1","1.9","ppa","1.7.3+20160310ubuntu1","1.7.3+20160308ubuntu1","1.7.3+20160303ubuntu4","1.7.3+20160303ubuntu3","1.7.3+20160303ubuntu2","1.7.3+20160303ubuntu1","1.7.3+20160225ubuntu1","1.7.2+20160223ubuntu1","1.7.2+20160204ubuntu1","1.7.2+20160113ubuntu1","1.7.2ubuntu1","1.7ubuntu1","1.6ubuntu1","1.5ubuntu1","1.4ubuntu1","1.3ubuntu1","1.2-0ubuntu1","1.1.2-0ubuntu1","1.1.1-0ubuntu1","1.1-0ubuntu1","1.0.1-0ubuntu1","1.0-0ubuntu1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4120.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}