CVE-2020-8566

Ceph RBD adminSecrets exposed in logs when loglevel >= 4

Description

In Kubernetes clusters using Ceph RBD as a storage provisioner, with logging level of at least 4, Ceph RBD admin secrets can be written to logs. This occurs in kube-controller-manager's logs during provisioning of Ceph RBD persistent claims. This affects < v1.19.3, < v1.18.10, < v1.17.13.

Remediation

Workaround:

  • Do not enable verbose logging in production (log level >= 4), limit access to logs.

Category

4.7
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.17%
Third-Party Advisory github.com Third-Party Advisory google.com Third-Party Advisory netapp.com
Affected: Kubernetes Kubernetes
Published at:
Updated at:

References

Link Tags
https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ mailing list third party advisory patch
https://github.com/kubernetes/kubernetes/issues/95624 third party advisory
https://security.netapp.com/advisory/ntap-20210122-0006/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-8566?
CVE-2020-8566 has been scored as a medium severity vulnerability.
How to fix CVE-2020-8566?
As a workaround for remediating CVE-2020-8566: Do not enable verbose logging in production (log level >= 4), limit access to logs.
Is CVE-2020-8566 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-8566 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-8566?
CVE-2020-8566 affects Kubernetes Kubernetes.
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