==========================================================================
Ubuntu Security Notice USN-3623-1
April 09, 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

Summary:

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

Software Description:
- ubuntu-release-upgrader: manage release upgrades

Details:

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

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

References:
  https://usn.ubuntu.com/usn/usn-3623-1
  https://launchpad.net/bugs/1174007

Package Information:
  https://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/1:17.10.11
  https://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/1:16.04.25
  https://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/1:0.220.10