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.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: canonical

Published: 2020-07-29T16:25:26.118479Z

Updated: 2024-09-17T04:04:04.329Z

Reserved: 2020-04-20T00:00:00

Link: CVE-2020-11934

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2020-07-29T17:15:12.967

Modified: 2020-08-05T18:46:07.417

Link: CVE-2020-11934

cve-icon Redhat

No data.