A Cloud-init regression update has been released for Ubuntu Linux 20.04 LTS.

USN-6042-2: Cloud-init regression

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Ubuntu Security Notice USN-6042-2
May 23, 2023

cloud-init regression
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

USN-6042-1 introduced a regression in Cloud-init.

Software Description:
- cloud-init: initialization and customization tool for cloud instances

Details:

USN-6042-1 fixed a vulnerability in Cloud-init. The update introduced a
regression on Ubuntu 20.04 LTS resulting in a possible loss of networking.
This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

James Golovich discovered that sensitive data could be exposed in logs. An
attacker could use this information to find hashed passwords and possibly
escalate their privilege.

Update instructions:

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

Ubuntu 20.04 LTS:
cloud-init 23.1.2-0ubuntu0~20.04.2

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

References:
https://ubuntu.com/security/notices/USN-6042-2
https://ubuntu.com/security/notices/USN-6042-1
https://launchpad.net/bugs/2020375

Package Information:
https://launchpad.net/ubuntu/+source/cloud-init/23.1.2-0ubuntu0~20.04.2