=========================================================================
Ubuntu Security Notice USN-7677-1
July 28, 2025

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

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in cloud-init.

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

Details:

Harry Sintonen discovered that the hotplugd socket in cloud-init was world
writable. An attacker could possibly use this issue to send hotplug-hook
commands. (CVE-2024-11584)

It was discovered that cloud-init granted root access to a hardcoded URL
with a local IP address when a non-x86 platform is detected. An attacker
could possibly impersonate an OpenStack endpoint and provide root
configuration data. (CVE-2024-6174)

Update instructions:

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

Ubuntu 25.04
  cloud-init                      25.1.4-0ubuntu0~25.04.1
  cloud-init-base                 25.1.4-0ubuntu0~25.04.1

Ubuntu 24.04 LTS
  cloud-init                      25.1.4-0ubuntu0~24.04.1

Ubuntu 22.04 LTS
  cloud-init                      25.1.4-0ubuntu0~22.04.1

Ubuntu 20.04 LTS
  cloud-init                      24.4.1-0ubuntu0~20.04.3+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  cloud-init                      23.1.2-0ubuntu0~18.04.1+esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  cloud-init                      21.1-19-gbad84ad4-0ubuntu1~16.04.4+esm2
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7677-1
  CVE-2024-11584, CVE-2024-6174

Package Information:
  https://launchpad.net/ubuntu/+source/cloud-init/25.1.4-0ubuntu0~25.04.1
  https://launchpad.net/ubuntu/+source/cloud-init/25.1.4-0ubuntu0~24.04.1
  https://launchpad.net/ubuntu/+source/cloud-init/25.1.4-0ubuntu0~22.04.1