CVE-2021-20267
Openstack Neutron has Insufficient Verification of IPv6 addresses
7.1
HIGH
CVSS 3.1
EPSS 1.0%
描述
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.
如何修補 CVE-2021-20267
要修補 CVE-2021-20267,請將受影響套件升級到下列已修補版本。
- —升級至 2:17.1.1-5 或更新版本
- —升級至 16.3.1 或更新版本
- —升級至 15.3.3 或更新版本
CVE-2021-20267 正在被利用嗎?
低 — EPSS 為 1.0%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0, < 2:17.1.1-5
- >= 16.0.0, < 16.3.1
- from 0, < 15.3.3, >= 16.0.0, < 16.3.1, >= 17.0.0, < 17.1.1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H |