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6.3
CVSSv3

CVE-2021-25736

Published: 30/10/2023 Updated: 21/12/2023
CVSS v3 Base Score: 6.3 | Impact Score: 4 | Exploitability Score: 1.8
VMScore: 0
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Vulnerability Summary

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.

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Vendor Advisories

Red Hat: CVE-2021-25736
A flaw was found in the Windows kube-proxy component In a cloud environment that does not set the “statusloadBalanceringressip” field in the LoadBalancer service status configuration (for example in AWS) the packets can be misrouted and reach an unintended destination ...

References

NVD-CWE-noinfohttps://github.com/kubernetes/kubernetes/pull/99958https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJhttps://security.netapp.com/advisory/ntap-20231221-0003/https://nvd.nist.govhttps://access.redhat.com/security/cve/cve-2021-25736
CVSSv3
CVSSv2
CVSSv3
VMScore
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