{"id":"AZL-89318","summary":"CVE-2020-8562 affecting package kubernetes 1.30.10-27","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.","modified":"2026-08-30T05:26:50Z","published":"2022-02-01T11:15:10Z","upstream":["CVE-2020-8562"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8562"}],"affected":[{"package":{"name":"kubernetes","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kubernetes"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.30.10-27"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-89318.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}