MEDIUM6.5
GHSA-863x-868h-968x
Ingress-nginx `path` sanitization can be bypassed with newline character
Quick fix
GHSA-863x-868h-968x — k8s.io/ingress-nginx: upgrade to the fixed version with the command below.
go get k8s.io/ingress-nginx@v1.2.1Details
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the `spec.rules[].http.paths[].path` field of an Ingress object (in the `networking.k8s.io` or `extensions` API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-25748[ADVISORY]
- https://github.com/kubernetes/ingress-nginx/issues/8686[WEB]
- https://github.com/kubernetes/ingress-nginx/pull/8623[WEB]
- https://github.com/kubernetes/ingress-nginx[PACKAGE]
- https://github.com/kubernetes/ingress-nginx/releases/tag/controller-v1.2.1[WEB]
- https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8[WEB]