CVE & CISA-KEV Catalog

CVE-2020-8562

LOW
2.2
CVSS v3
NVD

Description

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.

CWE-367TOCTOU Race Condition

How to fix

Remediation Available
kubernetesDebian
Fixed in:1.20.5+really1.20.2-1CVE-2020-8562
Fixed in:1.20.5+really1.20.2-1CVE-2020-8562
Fixed in:1.20.5+really1.20.2-1CVE-2020-8562
Fixed in:1.20.5+really1.20.2-1CVE-2020-8562

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredHigh
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityLow
IntegrityNone
AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

1.08%probability of exploitation in 30 days
61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Mitigation1
Other references1
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-01.