{"id":"CVE-2020-11934","aliases":["DEBIAN-CVE-2020-11934","EUVD-2020-4271","GHSA-8cwp-mjww-pqc2","UBUNTU-CVE-2020-11933","UBUNTU-CVE-2020-11934","USN-4424-1"],"status":"published","title":"Sandbox escape vulnerability via snapctl user-open (xdg-open)","description":"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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00365,"percentile":0.30631,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-668"],"published":"2020-07-15T12:00:00Z","modified":"2026-10-26T12:00:21Z","fixes":[{"ecosystem":"Debian:12","package":"snapd","fixed_in":["2.45.2-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"snapd","fixed_in":["2.45.2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"snapd","fixed_in":["2.45.2-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"snapd","fixed_in":["2.45.1ubuntu0.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"snapd","fixed_in":["2.45.1+18.04.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"snapd","fixed_in":["2.45.1+20.04.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.45.2-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.45.2-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.45.2-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"snapd","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"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"snapd","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"]}],"products":[{"vendor":"canonical","product":"snapd"},{"vendor":"canonical","product":"ubuntu_linux"},{"vendor":"canonical ltd.","product":"snapd"}],"references":[{"url":"https://ubuntu.com/USN-4424-1","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://launchpad.net/bugs/1880085","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11934"},{"url":"https://github.com/advisories/GHSA-8cwp-mjww-pqc2"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-11934","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-11934","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4424-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-11934","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-11933","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-11934","title":"Sandbox escape vulnerability via snapctl user-open (xdg-open)","description":"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.","status":"published","published":"2020-07-29T16:25:26.118Z","modified":"2024-09-17T04:04:04.329Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:57.352161Z"}],"euvd":[{"id":"EUVD-2020-4271","description":"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.","status":"published","published":"2020-07-29T16:25:26Z","modified":"2024-09-17T04:04:04Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-03T00:28:26.623918Z"}],"ghsa":[{"id":"GHSA-8cwp-mjww-pqc2","title":"It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable...","description":"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.","status":"published","published":"2022-05-24T17:24:36Z","modified":"2023-01-29T05:03:26Z","updated_at":"2026-11-02T14:45:19.492424Z"}],"nvd":[{"id":"CVE-2020-11934","description":"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.","status":"published","published":"2020-07-29T17:15:12.967Z","modified":"2026-06-17T02:51:05.153Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":1.9,"vector":"AV:L/AC:M/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:06:10.994748Z"}],"osv":[{"id":"CVE-2020-11934","description":"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.","status":"published","published":"2020-07-29T17:15:12.967Z","modified":"2026-03-14T09:52:02.556996Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:14.034736Z"},{"id":"DEBIAN-CVE-2020-11934","description":"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.","status":"published","published":"2020-07-29T17:15:12.967Z","modified":"2026-10-26T12:00:21.006160454Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:32.862554Z"},{"id":"UBUNTU-CVE-2020-11934","description":"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.","status":"published","published":"2020-07-15T12:00:00Z","modified":"2026-02-04T03:37:20.646164Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:22.212782Z"},{"id":"USN-4424-1","title":"snapd vulnerabilities","description":"It was discovered that cloud-init as managed by snapd on Ubuntu Core 16 and\nUbuntu Core 18 devices ran on every boot without restrictions. A physical\nattacker could exploit this to craft cloud-init user-data/meta-data via\nexternal media to perform arbitrary changes on the device to bypass\nintended security mechanisms such as full disk encryption. This issue did\nnot affect traditional Ubuntu systems. (CVE-2020-11933)\n\nIt was discovered that snapctl user-open allowed altering the XDG_DATA_DIRS \nenvironment variable when calling the system xdg-open. A malicious snap \ncould exploit this to bypass intended access restrictions to control how\nthe host system xdg-open script opens the URL. This issue did not affect \nUbuntu Core systems. (CVE-2020-11934)\n","status":"published","published":"2020-07-15T14:49:53Z","modified":"2026-02-10T04:41:52Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}