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Ubuntu Security Notice USN-3807-1
November 05, 2018

network-manager vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

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

Software Description:
- network-manager: Network connection manager

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.

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

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

References:
  https://usn.ubuntu.com/usn/usn-3807-1
  CVE-2018-15688

Package Information:
  https://launchpad.net/ubuntu/+source/network-manager/1.12.4-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/network-manager/1.10.6-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/network-manager/1.2.6-0ubuntu0.16.04.3