CVE-2021-20267 describes a flaw in OpenStack Neutron's default Open vSwitch firewall rules, allowing server instances to impersonate IPv6 addresses of other systems. This vulnerability affects deployments utilizing the Open vSwitch driver in OpenStack Neutron versions prior to 15.3.3, 16.3.1, and 17.1.1, as well as Red Hat OpenStack Platform. With a CVSS score of 7.1 (HIGH), the vulnerability can be exploited remotely with low complexity, potentially leading to denial of service or traffic interception. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 16.3.3CPE matchmatch criteria | cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* | ||
>= 17.0.0, < 17.1.3CPE matchmatch criteria | cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* | ||
18.0.0CPE matchmatch criteria | cpe:2.3:a:openstack:neutron:18.0.0:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:* | ||
13.0CPE matchmatch criteria | cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.