USN-6851-2: Netplan regression

28 June 2024

USN-6851-1 caused systemctl enable to fail

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Releases

Packages

  • netplan.io - YAML network configuration abstraction 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 where
systemd is not running. 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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 24.04
Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04

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

References

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