CVE-2020-8562
lowpriority · track · 12EPSS 0.012 · 68 %ileDEEUFRRUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (17)
Products and version ranges known to be affected.
advisories (4)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2024-1488IBM InfoSphere Information Server: Mehrere SchwachstellenDeutsch2024-06-30csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen in IBM InfoSphere Information Server ausnutzen, um beliebigen Programmcode auszuführen, einen Cross-Site-Scripting-Angriff durchzuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand zu erzeugen und vertrauliche Informationen offenzulegen.
- GHSA-qh36-44jv-c8xjPotential proxy IP restriction bypass in Kubernetes2022-02-02ghsa · osvUS
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. All versions of Kubernetes are impacted, and there is no fix in place.
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
- GO-2022-0617WITHDRAWN: Potential proxy IP restriction bypass in Kubernetes in k8s.io/kubernetes2024-08-21vendor · osvUS
(This report has been withdrawn from the Go vulnerability database with reason: "Low severity issue with no fix available or planned. Likely to cause false positives.").
also known as (5)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (15)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2020-8562cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=1954914Patchcnnvd
- https://github.com/kubernetes/kubernetes/issues/101493cnnvd
- https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOYcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-8562cnnvd
- https://security.netapp.com/advisory/ntap-20220225-0002/cnnvd
- https://vigilance.fr/vulnerability/Kubernetes-privilege-escalation-35243cnnvd
- https://github.com/kubernetes/kubernetes/issues/101493enisa_euvd
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