CVE-2020-8562
WITHDRAWN: Potential proxy IP restriction bypass in Kubernetes in k8s.io/kubernetes
描述
As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane.
如何修補 CVE-2020-8562
要修補 CVE-2020-8562,請將受影響套件升級到下列已修補版本。
- —升級至 1.20.5+really1.20.2-1 或更新版本
- —未列出修補版本
- —未列出修補版本
CVE-2020-8562 正在被利用嗎?
低 — EPSS 為 1.1%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0, < 1.20.5+really1.20.2-1
- >= 1.21.0, <= 1.21.1
- from 0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |