USN-4649-2: xdg-utils regression

12 January 2021

USN-4649-1 introduced a regression in xdg-utils.



  • xdg-utils - desktop integration utilities from


USN-4649-1 fixed vulnerabilities in xdg-utils. That update caused a regression
by removing the --attach functionality in thunderbird and others applications.
This update fix the problem by reverting these changes.

Original advisory details:

Jens Mueller discovered that xdg-utils incorrectly handled certain URI.
An attacker could possibly use this issue to expose sensitive information.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.