USN-3806-1: systemd vulnerability

5 November 2018

systemd vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


systemd-networkd could be made to crash or run programs if it received specially crafted network traffic.

Software Description

  • systemd - system and service manager


Felix Wilhelm discovered that the systemd-networkd DHCPv6 client incorrectly handled certain DHCPv6 messages. In configurations where systemd-networkd is being used, an attacker on the same network could use this issue to cause systemd-networkd to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 18.10
systemd - 239-7ubuntu10.1
Ubuntu 18.04 LTS
systemd - 237-3ubuntu10.4
Ubuntu 16.04 LTS
systemd - 229-4ubuntu21.6

To update your system, please follow these instructions:

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