CVE-2021-20267

7.1HIGH

Key Information

Vendor
Openstack
Status
Openstack-neutron
Vendor
CVE Published:
28 May 2021

Summary

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 Version(s)

openstack-neutron = openstack-neutron 15.3.3, openstack-neutron 16.3.1, openstack-neutron 17.1.1

References

https://bugzilla.redhat.com/show_bug.cgi?id=1934330
x_refsource_MISC
https://security.openstack.org/ossa/OSSA-2021-001.html
x_refsource_CONFIRM

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database
.