USN-6851-1: Netplan vulnerabilities

26 June 2024

Netplan could reveal secrets or execute commands with specially crafted configuration file.

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Releases

Packages

  • netplan.io - YAML network configuration abstraction for various backends

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.

Learn more about Ubuntu Pro

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

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

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Further reading