Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Neutron | < 16.3.3 |
| Redhat | Openstack Platform | 10.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1934330Issue TrackingPatchThird Party Advisory
- https://security.openstack.org/ossa/OSSA-2021-001.htmlPatchVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1934330Issue TrackingPatchThird Party Advisory
- https://security.openstack.org/ossa/OSSA-2021-001.htmlPatchVendor Advisory
FAQ
What is CVE-2021-20267?
CVE-2021-20267 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 impersonat...
How severe is CVE-2021-20267?
CVE-2021-20267 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-20267?
Check the references section above for vendor advisories and patch information. Affected products include: Openstack Neutron, Redhat Openstack Platform.