CVE-2020-11934
Sandbox escape vulnerability via snapctl user-open (xdg-open)
- State
- Published
- Severity
- 5.9 Medium
- Published
- Jul 29, 2020
- Updated
- Sep 17, 2024
- Reserved
- Apr 20, 2020
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.9 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N | canonical |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
snapdCanonical |
|
References
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