{"id":"UBUNTU-CVE-2021-3155","details":"snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1","modified":"2026-02-04T03:01:24.421585Z","published":"2021-01-13T00:00:00Z","related":["USN-5292-1","USN-5292-2","USN-5292-3"],"upstream":["CVE-2021-3155"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3155"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5292-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-3155"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5292-3"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5292-2"}],"affected":[{"package":{"name":"snapd","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.54.3+16.04~esm2?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.54.3+16.04~esm2"}]}],"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","2.48.3"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-snapcore-snapd-dev","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"snap-confine","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"snapd","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"snapd-xdg-open","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"ubuntu-core-launcher","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"ubuntu-core-snapd-units","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"ubuntu-snappy","binary_version":"2.54.3+16.04~esm2"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.54.3+16.04~esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3155.json"}},{"package":{"name":"snapd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.54.3+18.04?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.54.3+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","2.48.3+18.04","2.49.2+18.04","2.51.1+18.04","2.54.2+18.04ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-snapcore-snapd-dev","binary_version":"2.54.3+18.04"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.54.3+18.04"},{"binary_name":"snap-confine","binary_version":"2.54.3+18.04"},{"binary_name":"snapd","binary_version":"2.54.3+18.04"},{"binary_name":"snapd-xdg-open","binary_version":"2.54.3+18.04"},{"binary_name":"ubuntu-core-launcher","binary_version":"2.54.3+18.04"},{"binary_name":"ubuntu-core-snapd-units","binary_version":"2.54.3+18.04"},{"binary_name":"ubuntu-snappy","binary_version":"2.54.3+18.04"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.54.3+18.04"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3155.json"}},{"package":{"name":"snapd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.54.3+20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.54.3+20.04.1"}]}],"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","2.48.3+20.04","2.49.2+20.04","2.51.1+20.04ubuntu2","2.54.2+20.04ubuntu2","2.54.3+20.04"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-snapcore-snapd-dev","binary_version":"2.54.3+20.04.1"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.54.3+20.04.1"},{"binary_name":"snap-confine","binary_version":"2.54.3+20.04.1"},{"binary_name":"snapd","binary_version":"2.54.3+20.04.1"},{"binary_name":"snapd-xdg-open","binary_version":"2.54.3+20.04.1"},{"binary_name":"ubuntu-core-launcher","binary_version":"2.54.3+20.04.1"},{"binary_name":"ubuntu-core-snapd-units","binary_version":"2.54.3+20.04.1"},{"binary_name":"ubuntu-snappy","binary_version":"2.54.3+20.04.1"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.54.3+20.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3155.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}