An APT security update has been released for Ubuntu Linux 20.04 LTS, 19.10, 18.04 LTS, and 16.04 LTS.

USN-4359-1: APT vulnerability

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Ubuntu Security Notice USN-4359-1
May 14, 2020

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

- Ubuntu 20.04 LTS
- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

APT could be made to crash if it opened a specially crafted file.

Software Description:
- apt: Advanced front-end for dpkg

Details:

It was discovered that APT incorrectly handled certain filenames during
package installation. If an attacker could provide a specially crafted
package to be installed by the system administrator, this could cause APT
to crash.

Update instructions:

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

Ubuntu 20.04 LTS:
apt 2.0.2ubuntu0.1

Ubuntu 19.10:
apt 1.9.4ubuntu0.1

Ubuntu 18.04 LTS:
apt 1.6.12ubuntu0.1

Ubuntu 16.04 LTS:
apt 1.2.32ubuntu0.1

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

References:
  https://usn.ubuntu.com/4359-1
CVE-2020-3810

Package Information:
  https://launchpad.net/ubuntu/+source/apt/2.0.2ubuntu0.1
  https://launchpad.net/ubuntu/+source/apt/1.9.4ubuntu0.1
  https://launchpad.net/ubuntu/+source/apt/1.6.12ubuntu0.1
  https://launchpad.net/ubuntu/+source/apt/1.2.32ubuntu0.1