VDB
CVE-2021-20267
CVE-2021-20267
PUBLISHED
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.
EPSS 0.13% · 31.5th percentile
Risk Scores
EPSS Score
0.13%
31.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | neutron | 0, *, * |
| Ubuntu:18.04:LTS | neutron | *, 0, 2:11.0.1-0ubuntu1 |
| Ubuntu:20.04:LTS | neutron | 2:16.0.0~b2~git2020020712.d5b33ffc77-0ubuntu1, 2:16.0.0~b1~git2019121613.3e8abb9a8f-0ubuntu1, 2:15.0.0-0ubuntu1 |
Exploit Intelligence
Timeline
- May 28, 2021 CVE Published
- May 29, 2021 EPSS Score
- Jul 13, 2021 EPSS Score
- Jul 31, 2021 EPSS Score
- Dec 1, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Jan 31, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Apr 2, 2022 EPSS Score
- Aug 3, 2022 EPSS Score
- Oct 3, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20267 third-party-advisory
- https://review.opendev.org/c/openstack/neutron/+/776599 third-party-advisory
- https://ubuntu.com/security/notices/USN-6067-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20267 third-party-advisory