| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/zalando/skipper | < 0.24.0 | 0.24.0 |
| skipper | < 0.24.0 | 0.24.0 |
When running Skipper as an Ingress controller, users with permissions to create an Ingress and a Service of type ExternalName can create routes that enable them to use Skipper's network access to reach internal services.
https://github.com/zalando/skipper/releases/tag/v0.24.0 disables Kubernetes ExternalName by default.
Developers can allow list targets of an ExternalName by using -kubernetes-only-allowed-external-names=true and allow list via regular expressions -kubernetes-allowed-external-name '^[a-z][a-z0-9-.]+[.].allowed.example$'
https://kubernetes.io/docs/concepts/services-networking/service/#externalname
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free