GHSA-863x-868h-968x
Ingress-nginx `path` sanitization can be bypassed with newline character
At a glance
- Published
- Updated
- CVE
- CVE-2021-25748
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Description
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.
Affected packages
| Package | Versions |
|---|---|
| Go · k8s.io/ingress-nginx | introduced 0, fixed 1.2.1 |
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
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |