An EC2 hibagent update has been released for Ubuntu Linux 16.04 LTS.

[USN-6519-2] EC2 hibagent update

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Ubuntu Security Notice USN-6519-2
November 29, 2023

ec2-hibinit-agent update
==========================================================================

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

- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

A security improvement was added to EC2 hibagent.

Software Description:
- ec2-hibinit-agent: Amazon EC2 hibernation agent

Details:

USN-6519-1 added IMDSv2 support to EC2 hibagent. This update provides
the corresponding update for Ubuntu 16.04 LTS.

Original advisory details:

The EC2 hibagent package has been updated to add IMDSv2 support, as IMDSv1
uses an insecure protocol and is no longer recommended.

Update instructions:

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

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
ec2-hibinit-agent 1.0.0-0ubuntu4~16.04.4+esm1

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

References:
https://ubuntu.com/security/notices/USN-6519-2
https://ubuntu.com/security/notices/USN-6519-1
https://launchpad.net/bugs/1941785