USN-4036-1: OpenStack Neutron vulnerability

25 June 2019

neutron vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 16.04 LTS


A system hardening measure could be bypassed.

Software Description

  • neutron - OpenStack Virtual Network Service


Erik Olof Gunnar Andersson discovered that OpenStack Neutron incorrectly handled certain security group rules in the iptables firewall module. An authenticated attacker could possibly use this issue to block further application of security group rules for other instances.

Update instructions

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

Ubuntu 18.10
python-neutron - 2:13.0.2-0ubuntu3.4
python3-neutron - 2:13.0.2-0ubuntu3.4
Ubuntu 16.04 LTS
python-neutron - 2:8.4.0-0ubuntu7.4

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.