Vulnerability Monitor

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CVE-2021-20267

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

2021-05-28T19:15:07.483

Last Modified

2024-11-21T05:46:14.713

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.1 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:P/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

8.0

Impact Score

4.9

Weaknesses
  • Type: Primary
    CWE-345
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application openstack neutron < 16.3.3 Yes
Application openstack neutron < 17.1.3 Yes
Application openstack neutron 18.0.0 Yes
Application redhat openstack_platform 10.0 Yes
Application redhat openstack_platform 13.0 Yes
Application redhat openstack_platform 16.1 Yes
Application redhat openstack_platform 16.2 Yes
References