A Libtasn1 security update has been released for Ubuntu Linux 16.04 ESM.

USN-5352-1: Libtasn1 vulnerability

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Ubuntu Security Notice USN-5352-1
March 28, 2022

libtasn1-6 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

Libtasn1 could be made to crash if it opened a specially crafted
file.

Software Description:
- libtasn1-6: Library to manage ASN.1 structures

Details:

It was discovered that Libtasn1 incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 16.04 ESM:
libtasn1-6 4.7-3ubuntu0.16.04.3+esm2
libtasn1-bin 4.7-3ubuntu0.16.04.3+esm2

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

References:
https://ubuntu.com/security/notices/USN-5352-1
CVE-2018-1000654