USN-3623-1: ubuntu-release-upgrader vulnerability

9 April 2018

ubuntu-release-upgrader vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


ubuntu-release-upgrader incorrectly opened as browser as an administrator.

Software Description

  • ubuntu-release-upgrader - manage release upgrades


It was discovered that ubuntu-release-upgrader did not correctly drop permissions before opening a browser to view the release notes. This update fixes the issue.

Update instructions

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

Ubuntu 17.10
python3-distupgrade - 1:17.10.11
Ubuntu 16.04 LTS
python3-distupgrade - 1:16.04.25
Ubuntu 14.04 LTS
python3-distupgrade - 1:0.220.10

To update your system, please follow these instructions:

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