USN-3807-1: NetworkManager vulnerability

5 November 2018

network-manager vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


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

Software Description

  • network-manager - Network connection manager


Felix Wilhelm discovered that the NetworkManager internal DHCPv6 client incorrectly handled certain DHCPv6 messages. In non-default configurations where the internal DHCP client is enabled, an attacker on the same network could use this issue to cause NetworkManager 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
network-manager - 1.12.4-1ubuntu1.1
Ubuntu 18.04 LTS
network-manager - 1.10.6-2ubuntu1.1
Ubuntu 16.04 LTS
network-manager - 1.2.6-0ubuntu0.16.04.3

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.