An Aptdaemon security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, and 20.04 LTS.

USN-4537-1: Aptdaemon vulnerability

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Ubuntu Security Notice USN-4537-1
September 24, 2020

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Aptdaemon could be made to expose sensitive information.

Software Description:
- aptdaemon: transaction based package management service

Details:

Vaisha Bernard discovered that Aptdaemon incorrectly handled the Locale
property. A local attacker could use this issue to test for the presence of
local files.

Update instructions:

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

Ubuntu 20.04 LTS:
aptdaemon 1.1.1+bzr982-0ubuntu32.2

Ubuntu 18.04 LTS:
aptdaemon 1.1.1+bzr982-0ubuntu19.4

Ubuntu 16.04 LTS:
aptdaemon 1.1.1+bzr982-0ubuntu14.4

After a standard system update you need to reboot your computer to make all
the necessary changes.

References:
  https://usn.ubuntu.com/4537-1
CVE-2020-15703

Package Information:
  https://launchpad.net/ubuntu/+source/aptdaemon/1.1.1+bzr982-0ubuntu32.2
  https://launchpad.net/ubuntu/+source/aptdaemon/1.1.1+bzr982-0ubuntu19.4
  https://launchpad.net/ubuntu/+source/aptdaemon/1.1.1+bzr982-0ubuntu14.4