GHSA-35c7-w35f-xwgh

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    GHSA-35c7-w35f-xwgh

    Published: 30 Oct 2023Last Modified: 10 Sept 2026

    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 where the LoadBalancer controller sets the `status.loadBalancer.ingress[].ip` field are unaffected.

    References: https://nvd.nist.gov/vuln/detail/CVE-2021-25736, https://github.com/kubernetes/kubernetes/pull/99958, https://github.com/kubernetes/kubernetes/commit/b014610de3e5cf1bb0f7844b5758d29fc18b75e6, https://github.com/kubernetes/kubernetes, https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ, https://security.netapp.com/advisory/ntap-20231221-0003

    Affected packages

    Package

    Name: k8s.io/kubernetes

    Purl: pkg:golang/k8s.io/kubernetes

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.21.0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-35c7-w35f-xwgh | CVE-DB