Published: 28 May 2021
A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the IPv6 addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations. Only deployments using the Open vSwitch driver are affected. Source: OpenStack project. Versions before openstack-neutron 15.3.3, openstack-neutron 16.3.1 and openstack-neutron 17.1.1 are affected.
CVSS 3 base score: 7.1
Launchpad, Ubuntu, Debian
|Ubuntu 21.10 (Impish Indri)||
|Ubuntu 21.04 (Hirsute Hippo)||
|Ubuntu 20.04 LTS (Focal Fossa)||
|Ubuntu 18.04 LTS (Bionic Beaver)||
|Ubuntu 16.04 ESM (Xenial Xerus)||
|Ubuntu 14.04 ESM (Trusty Tahr)||
Does not exist
per upstream Affects: <15.3.3, >=16.0.0 <16.3.1, >=17.0.0 <17.1.1 as of 2021-05-13, patch has been flagged as possibly incomplete see comment #17 in upstream bug. addditional patch: https://review.opendev.org/c/openstack/neutron/+/783743 This issue is fixed in (2:16.4.0-0ubuntu2) in focal-updates and (2:18.1.0-0ubuntu2) in hirsute-updates, but they have not yet been released to -security.