GHSA-863x-868h-968x
Ingress-nginx `path` sanitization can be bypassed with newline character
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | k8s.io/ingress-nginx | < 1.2.1 | 1.2.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
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.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2021-25748
- https://github.com/kubernetes/ingress-nginx/issues/8686
- https://github.com/kubernetes/ingress-nginx/pull/8623
- https://github.com/kubernetes/ingress-nginx
- https://github.com/kubernetes/ingress-nginx/releases/tag/controller-v1.2.1
- https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8