CVE-2020-8562

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.

Link	Resource
https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY	Mailing List Third Party Advisory
https://github.com/kubernetes/kubernetes/issues/101493	Issue Tracking Mitigation
https://security.netapp.com/advisory/ntap-20220225-0002/	Third Party Advisory

Configuration 1

cpe:2.3:a:kubernetes:kubernetes:1.21.0:*:*:*:*:*:*:* cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*

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Published : 2022-02-01 11:15

Updated : 2022-03-29 04:35

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NVD link : CVE-2020-8562

Mitre link : CVE-2020-8562

No products.

CWE-367