Cilium is a networking, observability, and security solution. From 1.19.0 to 1.19.4, standard Kubernetes NetworkPolicy specifications using CIDR-based ipBlock rules without pod or namespace selectors erroneously generate a wildcard namespace allow rule when Cilium is configured with a custom clusterName rather than the default any value. The parser incorrectly instantiates a pod selector on selectorless peer definitions, allowing traffic from other workloads in the same namespace as the subject of the policy. This issue is fixed in version 1.19.5.
| Vendor | Product | Versions |
|---|---|---|
| cilium | cilium | >= 1.19.0, < 1.19.5 |
Updated severity to HIGH, CVSS estimate to 7.0, marked as actively exploited, and confirmed patch available in version 1.19.5.
Initial creation
