CVE-2021-25742 Ingress-nginx custom snippets allows retrieval of ingress-nginx serviceaccount token and secrets across all namespaces

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster...

Kubernetes: Authenticated kubernetes principal with restricted permissions can retrieve ingress-nginx serviceaccount token and secrets across all namespaces

Summary: Retrieving ingress-nginx serviceaccount token ingress-nginx allows adding custom snippets of nginx configuration to Kubernetes ingress objects. These snippets can be applied to either the relevant location or server blocks with the following annotations, respectively...