An APT security update has been released for Ubuntu 14.04 ESM.

USN-4667-2: APT vulnerability

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Ubuntu Security Notice USN-4667-2
January 11, 2021

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

- Ubuntu 14.04 ESM

Summary:

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

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

Details:

USN-4667-1 fixed a vulnerability in APT. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Kevin Backhouse discovered that APT incorrectly handled certain packages.
A local attacker could possibly use this issue to cause APT to crash or
stop responding, resulting in a denial of service.

Update instructions:

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

Ubuntu 14.04 ESM:
apt 1.0.1ubuntu2.24+esm3

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

References:
  https://usn.ubuntu.com/4667-2
  https://usn.ubuntu.com/4667-1
CVE-2020-27350

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