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Red Hat OpenShift: CVE-2021-25736: kubernetes: LoadBalancer Service type don't create a HNS policy for empty or invalid external loadbalancer IP, what could lead to MITM

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Red Hat OpenShift: CVE-2021-25736: kubernetes: LoadBalancer Service type don't create a HNS policy for empty or invalid external loadbalancer IP, what could lead to MITM

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
06/24/2021
Created
06/25/2021
Added
06/24/2021
Modified
11/20/2023

Description

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.

Solution(s)

  • linuxrpm-upgrade-openshift4-wincw-windows-machine-config-rhel8-operator

References

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