{"schema_version":"1.9.0","id":"GHSA-35c7-w35f-xwgh","published":"2023-10-30T03:30:15Z","modified":"2026-09-10T03:50:03.384919778Z","aliases":["CVE-2021-25736","GO-2023-2159"],"summary":"Kube-proxy may unintentionally forward traffic","details":"Kube-proxy on Windows can unintentionally forward traffic to local processes listening on the same port (`spec.ports[*].port`) as a LoadBalancer Service when the LoadBalancer controller does not set the `status.loadBalancer.ingress[].ip` field. Clusters \nwhere the LoadBalancer controller sets the `status.loadBalancer.ingress[].ip` field are unaffected.","affected":[{"package":{"name":"k8s.io/kubernetes","ecosystem":"Go","purl":"pkg:golang/k8s.io/kubernetes"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.21.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/10/GHSA-35c7-w35f-xwgh/GHSA-35c7-w35f-xwgh.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25736"},{"type":"WEB","url":"https://github.com/kubernetes/kubernetes/pull/99958"},{"type":"WEB","url":"https://github.com/kubernetes/kubernetes/commit/b014610de3e5cf1bb0f7844b5758d29fc18b75e6"},{"type":"PACKAGE","url":"https://github.com/kubernetes/kubernetes"},{"type":"WEB","url":"https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20231221-0003"}],"database_specific":{"cwe_ids":[],"github_reviewed":true,"github_reviewed_at":"2023-10-31T22:23:04Z","nvd_published_at":"2023-10-30T03:15:07Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N"}]}