CVE-2021-25736
Medium
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.
SeverityMedium
CVSS5.8
Exploit probability—
ProductKubernetes
PublishedOct 30, 2023
First seenOct 30, 2023
Weakness typeCWE-114CWE-114
How to fix
Update
- kubernetes kubernetes1.18.18, 1.19.10, 1.20.6 or later
- k8s.io/kubernetes1.21.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kubernetes kubernetes | 1.18.0 ≤ v < 1.18.18, 1.19.0 ≤ v < 1.19.10, 1.20.0 ≤ v < 1.20.6 | 1.18.18, 1.19.10, 1.20.6 |
| k8s.io/kubernetesGo | v < 1.21.0 | 1.21.0 |
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