CVE-2020-8561

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 v3 4.1 MEDIUM
CVSS v2.0 4.0 MEDIUM

4.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:N/A:N

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/kubernetes/kubernetes/issues/104720	Mitigation Third Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY	Mailing List Mitigation
https://security.netapp.com/advisory/ntap-20211014-0002/	Third Party Advisory
https://github.com/kubernetes/kubernetes/issues/104720	Mitigation Third Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY	Mailing List Mitigation
https://security.netapp.com/advisory/ntap-20211014-0002/	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:kubernetes:kubernetes:1.20.11:-::::::
	cpe:2.3:a:kubernetes:kubernetes:1.21.5:-::::::
	cpe:2.3:a:kubernetes:kubernetes:1.22.2:-::::::

History

No history.

Information

Published : 2021-09-20 17:15

Updated : 2024-11-21 05:39

NVD link : CVE-2020-8561

Mitre link : CVE-2020-8561

CVE.ORG link : CVE-2020-8561

JSON object : View

Products Affected

kubernetes

kubernetes

CWE

CWE-441

Unintended Proxy or Intermediary ('Confused Deputy')

CWE-610

Externally Controlled Reference to a Resource in Another Sphere

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