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.
Published: 2021-05-28
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-4983-1 neutron security update
EUVD EUVD EUVD-2021-0142 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.
Github GHSA Github GHSA GHSA-w8hx-f868-pvch Openstack Neutron has Insufficient Verification of IPv6 addresses
Ubuntu USN Ubuntu USN USN-6067-1 OpenStack Neutron vulnerabilities
History

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Subscriptions

Openstack Neutron
Redhat Openstack Platform
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-03T17:37:23.213Z

Reserved: 2020-12-17T00:00:00.000Z

Link: CVE-2021-20267

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-05-28T19:15:07.483

Modified: 2024-11-21T05:46:14.713

Link: CVE-2021-20267

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-11-05T00:00:00Z

Links: CVE-2021-20267 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses