CVEvulnerability

CVE-2021-20267

7.1 HIGH Published 2021-05-28 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-05-28
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
CVSS 2.0 ([email protected])
5.5 MEDIUM — AV:N/AC:L/Au:S/C:P/I:N/A:P
Weaknesses
CWE-345

Description

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.

Affected configurations

• openstack neutron (< 16.3.3) • openstack neutron (>= 17.0.0 < 17.1.3) • openstack neutron 18.0.0 • redhat openstack platform 10.0 • redhat openstack platform 13.0 • redhat openstack platform 16.1 • redhat openstack platform 16.2

Related

Weakness · CWE (1)

  • CWE-345 Insufficient Verification of Data Authenticity weakness

References