GHSA-35c7-w35f-xwgh

Kube-proxy may unintentionally forward traffic

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-25736

Packages

Ecosystem	Package	Affected	Fixed in
Go	k8s.io/kubernetes	< 1.21.0	1.21.0

Details

As written in the advisory (Markdown source, shown as plain text).

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

External links from the advisory. They lead to third-party sites.

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