GHSA-MXXC-P822-2HX9 Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName

Impact 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. Patches https://github.com/zalando/skipper/releases/tag/v0.24.0...