SB2024091830 - Externally controlled reference to a resource in another sphere in Kubernetes

Description

This security bulletin contains information about 1 vulnerability.

1) Externally Controlled Reference to a Resource in Another Sphere (CVE-ID: CVE-2020-8561)

CWE-ID: CWE-610 - Externally Controlled Reference to a Resource in Another Sphere

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests is able to redirect kube-apiserver requests to private networks of the apiserver.

Remediation

Install update from vendor's website.

References

• https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY
• https://github.com/kubernetes/kubernetes/issues/104720
• https://security.netapp.com/advisory/ntap-20211014-0002/