USN-3807-1: NetworkManager vulnerability

Publication date

5 November 2018

Overview

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


Packages

Details

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.10 cosmic network-manager –  1.12.4-1ubuntu1.1
18.04 bionic network-manager –  1.10.6-2ubuntu1.1
16.04 xenial network-manager –  1.2.6-0ubuntu0.16.04.3

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