{"schema_version":"1.8.0","id":"CVE-2020-8562","published":"2022-02-01T11:15:10.903Z","modified":"2026-08-07T15:14:50.184195Z","aliases":["GHSA-qh36-44jv-c8xj"],"related":["CGA-3jgm-r7fh-whf3","openSUSE-SU-2025:15424-1"],"details":"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.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kubernetes/kubelet","events":[{"introduced":"0"},{"last_affected":"91407aecd4edbe8888bb4648ee46e8dae792a20d"},{"introduced":"1af8853567a0faecc59fbc4d7d2ddc9359ddde83"},{"last_affected":"ea1348bf4a58d089e74ac7def7f855945a2c0bbb"},{"introduced":"30b4cd52c54df86ed93459ba84b3e61877fc28ea"},{"last_affected":"723e5d932a5277a14f5c636330ac445539bf5708"},{"introduced":"2f96697a6b8649844ec80a9bbe6d7cde3b197f5b"},{"last_affected":"2f96697a6b8649844ec80a9bbe6d7cde3b197f5b"}],"database_specific":{"cpe":["cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*","cpe:2.3:a:kubernetes:kubernetes:1.21.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"last_affected":"1.18.18"},{"introduced":"1.19.0"},{"last_affected":"1.19.10"},{"introduced":"1.20.0"},{"last_affected":"1.20.6"},{"introduced":"1.21.0"},{"last_affected":"1.21.0"}],"source":["CPE_RANGE","CPE_STRING"]}}],"versions":["1.21.0","v0.20.6","kubernetes-1.20.6","v0.19.10","kubernetes-1.19.10","v0.18.18","kubernetes-1.18.18","v0.21.0","kubernetes-1.21.0","kubernetes-1.9.0-alpha.3","kubernetes-1.9.0-alpha.2","kubernetes-1.9.0-alpha.1","kubernetes-1.9.0-alpha.0","kubernetes-1.13.0-alpha.0","kubernetes-1.12.0-beta.0","kubernetes-1.12.0-alpha.1","kubernetes-1.12.0-alpha.0","kubernetes-1.11.0-alpha.2","kubernetes-1.11.0-alpha.1","kubernetes-1.11.0-alpha.0","kubernetes-1.10.0-alpha.3","kubernetes-1.10.0-alpha.2","kubernetes-1.10.0-alpha.1","kubernetes-1.10.0-alpha.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8562.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/kubernetes/kubernetes","events":[{"introduced":"0"},{"last_affected":"6f6ce59dc8fefde25a3ba0ef0047f4ec6662ef24"},{"introduced":"e19964183377d0ec2052d1f1fa930c4d7575bd50"},{"last_affected":"98d5dc5d36d34a7ee13368a7893dcb400ec4e566"},{"introduced":"af46c47ce925f4c4ad5cc8d1fca46c7b77d13b38"},{"last_affected":"8a62859e515889f07e3e3be6a1080413f17cf2c3"},{"introduced":"cb303e613a121a29364f75cc67d3d580833a7479"},{"last_affected":"cb303e613a121a29364f75cc67d3d580833a7479"}],"database_specific":{"cpe":["cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*","cpe:2.3:a:kubernetes:kubernetes:1.21.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"last_affected":"1.18.18"},{"introduced":"1.19.0"},{"last_affected":"1.19.10"},{"introduced":"1.20.0"},{"last_affected":"1.20.6"},{"introduced":"1.21.0"},{"last_affected":"1.21.0"}],"source":["CPE_RANGE","CPE_STRING"]}}],"versions":["1.21.0","v1.18.18","v1.19.10","v1.20.6","v1.21.0","v1.18.18-rc.0","v1.20.6-rc.0","v1.19.10-rc.0","v1.20.5","v1.19.9","v1.18.17","v1.20.5-rc.0","v1.20.4","v1.19.9-rc.0","v1.20.4-rc.0","v1.18.17-rc.0","v1.20.3","v1.19.8","v1.18.16","v1.18.16-rc.0","v1.20.3-rc.0","v1.19.8-rc.0","v1.20.2","v1.19.7","v1.18.15","v1.18.15-rc.0","v1.20.2-rc.0","v1.19.7-rc.0","v1.18.14","v1.19.6","v1.20.1","v1.18.14-rc.1","v1.19.6-rc.1","v1.20.1-rc.1","v1.18.14-rc.0","v1.18.13","v1.19.6-rc.0","v1.19.5","v1.20.1-rc.0","v1.20.0","v1.18.13-rc.0","v1.18.12","v1.19.5-rc.0","v1.19.4","v1.18.12-rc.1","v1.18.11-rc.0","v1.18.10","v1.19.4-rc.0","v1.19.3","v1.18.10-rc.0","v1.19.3-rc.0","v1.18.9","v1.19.2","v1.19.2-rc.0","v1.19.1","v1.19.1-rc.0","v1.19.0","v1.18.9-rc.0","v1.18.8","v1.18.8-rc.1","v1.18.7-rc.0","v1.18.6","v1.18.6-rc.0","v1.18.5","v1.18.5-rc.1","v1.18.5-rc.0","v1.18.4","v1.18.4-rc.0","v1.18.3","v1.18.3-beta.0","v1.18.2","v1.18.2-beta.0","v1.18.1","v1.18.1-beta.0","v1.18.0","v1.18.0-rc.1","v1.18.0-beta.2","v1.19.0-alpha.0","v1.18.0-beta.1","v1.18.0-beta.0","v1.18.0-alpha.5","v1.18.0-alpha.4","v1.18.0-alpha.2","v1.18.0-alpha.1","v1.18.0-alpha.0","v1.17.0-alpha.3","v1.17.0-alpha.1","v1.17.0-alpha.2","v1.17.0-alpha.0","v1.16.0-alpha.3","v1.16.0-alpha.2","v1.16.0-alpha.1","v1.16.0-alpha.0","v1.15.0-alpha.3","v1.15.0-alpha.2","v1.15.0-alpha.1","v1.14.0-alpha.3","v1.15.0-alpha.0","v1.14.0-alpha.2","v1.14.0-alpha.1","v1.14.0-alpha.0","v1.13.0-alpha.3","v1.13.0-alpha.2","v1.13.0-alpha.1","v1.13.0-alpha.0","v1.12.0-alpha.1","v1.12.0-alpha.0","v1.11.0-alpha.2","v1.11.0-alpha.1","v1.11.0-alpha.0","v1.10.0-alpha.3","v1.10.0-alpha.2","v1.10.0-alpha.1","v1.9.0-alpha.3","v1.10.0-alpha.0","v1.9.0-alpha.2","v1.9.0-alpha.1","v1.9.0-alpha.0","v1.8.0-alpha.3","v1.8.0-alpha.2","v1.8.0-alpha.0","v1.8.0-alpha.1","v1.7.0-alpha.4","v1.7.0-alpha.3","v1.7.0-alpha.2","v1.7.0-alpha.1","v1.7.0-alpha.0","v1.6.0-alpha.3","v1.6.0-alpha.2","v1.6.0-alpha.1","v1.6.0-alpha.0","v1.5.0-alpha.2","v1.5.0-alpha.1","v1.5.0-alpha.0","v1.4.0-alpha.3","v1.4.0-alpha.1","v1.4.0-alpha.2","v1.3.0-alpha.5","v1.3.0-alpha.4","v1.3.0-alpha.3","v1.3.0-alpha.1","v1.3.0-alpha.2","v1.3.0-alpha.0","v1.2.0-alpha.8","v1.2.0-alpha.7","v1.2.0-alpha.6","v1.2.0-alpha.5","v1.2.0-alpha.4","v1.2.0-alpha.3","v1.2.0-alpha.2","v1.2.0-alpha.1","v1.1.0-alpha.1","v1.1.0-alpha.0","v0.17.0","v0.13.1-dev"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8562.json"}}],"references":[{"type":"ADVISORY","url":"https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20220225-0002/"},{"type":"REPORT","url":"https://github.com/kubernetes/kubernetes/issues/101493"},{"type":"ARTICLE","url":"https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}