CVE-2020-8561 — MEDIUM (4.1)

Vulnerability 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.

CVSS Score

4.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Kubernetes	Kubernetes	1.20.11

Related Weaknesses (CWE)

CWE-441 CWE-610

References

https://github.com/kubernetes/kubernetes/issues/104720MitigationThird Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsYMailing ListMitigation
https://security.netapp.com/advisory/ntap-20211014-0002/Third Party Advisory
https://github.com/kubernetes/kubernetes/issues/104720MitigationThird Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsYMailing ListMitigation
https://security.netapp.com/advisory/ntap-20211014-0002/Third Party Advisory

FAQ

What is CVE-2020-8561?

CVE-2020-8561 is a vulnerability with a CVSS score of 4.1 (MEDIUM). A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver req...

How severe is CVE-2020-8561?

CVE-2020-8561 has been rated MEDIUM with a CVSS base score of 4.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-8561?

Check the references section above for vendor advisories and patch information. Affected products include: Kubernetes Kubernetes.