{"id":"USN-4728-1","summary":"snapd vulnerability","details":"Gilad Reti and Nimrod Stoler discovered that snapd did not correctly specify cgroup\ndelegation when generating systemd service units for various container\nmanagement snaps. This could allow a local attacker to escalate privileges\nvia access to arbitrary devices of the container host from within a\ncompromised or malicious container.\n","modified":"2026-02-10T04:42:03Z","published":"2021-02-10T01:14:00Z","related":["UBUNTU-CVE-2020-27352"],"upstream":["CVE-2020-27352","UBUNTU-CVE-2020-27352"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4728-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-27352"}],"affected":[{"package":{"name":"snapd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.48.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.48.3"}]}],"versions":["1.9","1.9.1.1","1.9.2","2.0","2.0.1","2.0.2","2.0.3","2.0.5","2.0.8","2.0.9","2.0.10","2.11+0.16.04","2.12+0.16.04","2.13","2.14.2~16.04","2.15.2ubuntu1","2.16ubuntu3","2.17.1ubuntu1","2.20.1ubuntu1","2.21","2.22.2","2.22.3","2.22.6","2.23.1","2.24.1","2.25","2.26.10","2.27.5","2.28.5","2.29.4.2","2.32.3.2","2.32.9","2.33.1ubuntu2","2.34.2","2.34.2ubuntu0.1","2.37.4","2.37.4ubuntu0.1","2.38","2.39.2","2.39.2ubuntu0.2","2.40","2.42.1","2.45.1","2.45.1ubuntu0.2","2.46.1","2.47.1","2.48"],"ecosystem_specific":{"binaries":[{"binary_version":"2.48.3","binary_name":"golang-github-snapcore-snapd-dev"},{"binary_version":"2.48.3","binary_name":"golang-github-ubuntu-core-snappy-dev"},{"binary_version":"2.48.3","binary_name":"snap-confine"},{"binary_version":"2.48.3","binary_name":"snapd"},{"binary_version":"2.48.3","binary_name":"snapd-xdg-open"},{"binary_version":"2.48.3","binary_name":"ubuntu-core-launcher"},{"binary_version":"2.48.3","binary_name":"ubuntu-core-snapd-units"},{"binary_version":"2.48.3","binary_name":"ubuntu-snappy"},{"binary_version":"2.48.3","binary_name":"ubuntu-snappy-cli"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4728-1.json","cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-27352"}]}}},{"package":{"name":"snapd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.48.3+18.04?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.48.3+18.04"}]}],"versions":["2.28.5+17.10","2.29.4.1+18.04","2.29.4.2+18.04","2.31.1+18.04","2.32+18.04~pre5","2.32+18.04~pre6","2.32+18.04","2.32.3.2+18.04","2.32.5+18.04","2.32.8+18.04","2.32.9+18.04","2.33.1+18.04ubuntu2","2.34.2+18.04","2.34.2+18.04.1","2.37.1+18.04","2.37.1.1+18.04","2.37.4+18.04","2.37.4+18.04.1","2.38+18.04","2.39.2+18.04","2.40+18.04","2.42.1+18.04","2.45.1+18.04","2.45.1+18.04.2","2.46.1+18.04","2.47.1+18.04","2.48+18.04"],"ecosystem_specific":{"binaries":[{"binary_version":"2.48.3+18.04","binary_name":"golang-github-snapcore-snapd-dev"},{"binary_version":"2.48.3+18.04","binary_name":"golang-github-ubuntu-core-snappy-dev"},{"binary_version":"2.48.3+18.04","binary_name":"snap-confine"},{"binary_version":"2.48.3+18.04","binary_name":"snapd"},{"binary_version":"2.48.3+18.04","binary_name":"snapd-xdg-open"},{"binary_version":"2.48.3+18.04","binary_name":"ubuntu-core-launcher"},{"binary_version":"2.48.3+18.04","binary_name":"ubuntu-core-snapd-units"},{"binary_version":"2.48.3+18.04","binary_name":"ubuntu-snappy"},{"binary_version":"2.48.3+18.04","binary_name":"ubuntu-snappy-cli"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4728-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-27352"}]}}},{"package":{"name":"snapd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.48.3+20.04?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.48.3+20.04"}]}],"versions":["2.41+19.10.1","2.42.1+20.04","2.43.3+git1.8109f8","2.44~pre1+20.04","2.44+20.04","2.44.2+20.04","2.44.3+20.04","2.45.1+20.04","2.45.1+20.04.2","2.46.1+20.04","2.47.1+20.04","2.48+20.04"],"ecosystem_specific":{"binaries":[{"binary_version":"2.48.3+20.04","binary_name":"golang-github-snapcore-snapd-dev"},{"binary_version":"2.48.3+20.04","binary_name":"golang-github-ubuntu-core-snappy-dev"},{"binary_version":"2.48.3+20.04","binary_name":"snap-confine"},{"binary_version":"2.48.3+20.04","binary_name":"snapd"},{"binary_version":"2.48.3+20.04","binary_name":"snapd-xdg-open"},{"binary_version":"2.48.3+20.04","binary_name":"ubuntu-core-launcher"},{"binary_version":"2.48.3+20.04","binary_name":"ubuntu-core-snapd-units"},{"binary_version":"2.48.3+20.04","binary_name":"ubuntu-snappy"},{"binary_version":"2.48.3+20.04","binary_name":"ubuntu-snappy-cli"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4728-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2020-27352"}]}}}],"schema_version":"1.7.3"}