CVE-2020-8561
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-8561
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | affected | | |
| debian | bookworm | fixed | 1.20.5+really1.20.2-1 |
| debian | bullseye | fixed | 1.20.5+really1.20.2-1 |
| debian | forky | fixed | 1.20.5+really1.20.2-1 |
| debian | sid | fixed | 1.20.5+really1.20.2-1 |
| debian | trixie | fixed | 1.20.5+really1.20.2-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | k8s.io/kubernetes | <=1.22.2 | |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-8561
- https://github.com/kubernetes/kubernetes/issues/104720
- https://github.com/kubernetes/kubernetes
- https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY
- https://security.netapp.com/advisory/ntap-20211014-0002
- https://security-tracker.debian.org/tracker/CVE-2020-8561
Verify integrity in audit chain (admin only). AS-IS.