Vulnerability · Published May 6, 2022 · Assigned by kubernetes
CVE-2021-25745Ingress-nginx path can be pointed to service account token file
High 7.6
In plain English
A high-severity improper input validation in Kubernetes ingress-nginx from Kubernetes. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use 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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | k8s.io/ingress-nginx | 1.2.0 | GHSA-pvmg-xgmx-9mxh |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | Kubernetes ingress-nginx | unspecified – before 1.2.0 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
References
- https://groups.google.com/g/kubernetes-security-announce/c/7vQrpDZeBlc x_refsource_MISC
- https://github.com/kubernetes/ingress-nginx/issues/8502 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220609-0006/ x_refsource_CONFIRM