medium4.8
CVE-2021-25737
Incomplete List of Disallowed Inputs in Kubernetes
Impact
A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | k8s.io/kubernetes | >= 1.16.0, < 1.18.19 | 1.18.19 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Kubernetes | Kubernetes | from 1.16.0 before 1.18.19 from 1.19.0 before 1.19.10 from 1.20.0 before 1.20.7 Version 1.21.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/kubernetes/kubernetes/issues/102106
- https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY
- https://security.netapp.com/advisory/ntap-20211004-0004/
- https://github.com/advisories/GHSA-mfv7-gq43-w965
- https://nvd.nist.gov/vuln/detail/CVE-2021-25737