CVE-2021-25737
Incomplete List of Disallowed Inputs in Kubernetes in k8s.io/kubernetes
4.8
MEDIUM
CVSS 3.1
EPSS 0.38%
Description
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.
How to fix CVE-2021-25737
To remediate CVE-2021-25737, upgrade the affected package to a fixed version below.
- —upgrade to 1.20.5+really1.20.2-1 or later
- —upgrade to 1.18.19 or later
- —upgrade to 1.18.19 or later
Is CVE-2021-25737 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 1.20.5+really1.20.2-1
- >= 1.16.0, < 1.18.19
- >= 1.16.0, < 1.18.19, >= 1.19.0, < 1.19.11, >= 1.20.0, < 1.20.7, >= 1.21.0, < 1.21.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |