Ubuntu 24.04 LTS: USN-6851-2 Regression Fix for Netplan Update

ubuntu

July 2, 2024

USN-6851-1 caused systemctl enable to fail

Summary

USN-6851-1 caused systemctl enable to fail

Software Description:

- netplan.io: Declarative network configuration for various backends

Details:

USN-6851-1 fixed vulnerabilities in Netplan. The update lead to the

discovery of

a regression in netplan which caused systemctl enable to fail on systems

without

dbus. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Andreas Hasenack discovered that netplan incorrectly handled the permissions

for netdev files containing wireguard configuration. An attacker could use

this to obtain wireguard secret keys.

It was discovered that netplan configuration could be manipulated into

injecting

arbitrary commands while setting up network interfaces. An attacker could

use this to execute arbitrary commands or escalate privileges.

Topics Covered

security advisory security fix Ubuntu system update network configuration regression netplan.io

Update Instructions

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

Ubuntu 24.04 LTS
   libnetplan1                     1.0-2ubuntu1.2
   netplan-generator               1.0-2ubuntu1.2
   netplan.io                      1.0-2ubuntu1.2

Ubuntu 23.10
   libnetplan0                     0.107-5ubuntu0.4
   netplan-generator               0.107-5ubuntu0.4
   netplan.io                      0.107-5ubuntu0.4

Ubuntu 22.04 LTS
   libnetplan0                     0.106.1-7ubuntu0.22.04.4
   netplan.io                      0.106.1-7ubuntu0.22.04.4

Ubuntu 20.04 LTS
   libnetplan0                     0.104-0ubuntu2~20.04.6
   netplan.io                      0.104-0ubuntu2~20.04.6

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