CVE-2020-11934
It was discovered that snapctl user-open allowed altering the $XDG_DATA_DIRS environment variable when calling the system xdg-open.
Does this matter?
Lower severity and a low EPSS score (0.36%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
- EPSS
- 0.36% probability · 30th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-668
- Affected
- canonical/ubuntu linux
- Source
- security@ubuntu.com
References
- https://launchpad.net/bugs/1880085Third Party Advisory
- https://ubuntu.com/USN-4424-1Vendor Advisory
- https://launchpad.net/bugs/1880085Third Party Advisory
- https://ubuntu.com/USN-4424-1Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.