{"id":"UBUNTU-CVE-2020-11934","details":"It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the system xdg-open. OpenURL() in usersession/userd/launcher.go would alter $XDG_DATA_DIRS to append a path to a directory controlled by the calling snap. A malicious snap could exploit this to bypass intended access restrictions to control how the host system xdg-open script opens the URL and, for example, execute a script shipped with the snap without confinement. This issue did not affect Ubuntu Core systems. Fixed in snapd versions 2.45.1ubuntu0.2, 2.45.1+18.04.2 and 2.45.1+20.04.2.","modified":"2026-02-04T03:37:20.646164Z","published":"2020-07-15T12:00:00Z","related":["USN-4424-1"],"upstream":["CVE-2020-11934"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-11934"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4424-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-11934"}],"affected":[{"package":{"name":"snapd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.45.1ubuntu0.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.45.1ubuntu0.2"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.45.1ubuntu0.2","binary_name":"golang-github-snapcore-snapd-dev"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.45.1ubuntu0.2"},{"binary_name":"snap-confine","binary_version":"2.45.1ubuntu0.2"},{"binary_name":"snapd","binary_version":"2.45.1ubuntu0.2"},{"binary_name":"snapd-xdg-open","binary_version":"2.45.1ubuntu0.2"},{"binary_version":"2.45.1ubuntu0.2","binary_name":"ubuntu-core-launcher"},{"binary_version":"2.45.1ubuntu0.2","binary_name":"ubuntu-core-snapd-units"},{"binary_name":"ubuntu-snappy","binary_version":"2.45.1ubuntu0.2"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.45.1ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11934.json"}},{"package":{"name":"snapd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.45.1+18.04.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.45.1+18.04.2"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"golang-github-snapcore-snapd-dev","binary_version":"2.45.1+18.04.2"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.45.1+18.04.2"},{"binary_name":"snap-confine","binary_version":"2.45.1+18.04.2"},{"binary_version":"2.45.1+18.04.2","binary_name":"snapd"},{"binary_name":"snapd-xdg-open","binary_version":"2.45.1+18.04.2"},{"binary_name":"ubuntu-core-launcher","binary_version":"2.45.1+18.04.2"},{"binary_name":"ubuntu-core-snapd-units","binary_version":"2.45.1+18.04.2"},{"binary_name":"ubuntu-snappy","binary_version":"2.45.1+18.04.2"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.45.1+18.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11934.json"}},{"package":{"name":"snapd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/snapd@2.45.1+20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.45.1+20.04.2"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"golang-github-snapcore-snapd-dev","binary_version":"2.45.1+20.04.2"},{"binary_name":"golang-github-ubuntu-core-snappy-dev","binary_version":"2.45.1+20.04.2"},{"binary_name":"snap-confine","binary_version":"2.45.1+20.04.2"},{"binary_name":"snapd","binary_version":"2.45.1+20.04.2"},{"binary_name":"snapd-xdg-open","binary_version":"2.45.1+20.04.2"},{"binary_version":"2.45.1+20.04.2","binary_name":"ubuntu-core-launcher"},{"binary_name":"ubuntu-core-snapd-units","binary_version":"2.45.1+20.04.2"},{"binary_name":"ubuntu-snappy","binary_version":"2.45.1+20.04.2"},{"binary_name":"ubuntu-snappy-cli","binary_version":"2.45.1+20.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11934.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}