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CVE-2020-8561

MEDIUM
Published 2021-09-20T17:05:16.328714Z
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CVSS Score

V3.1
4.1
/10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.003
probability
of exploitation in the wild

There is a 0.3% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.508
Higher than 50.8% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED

Impact Metrics

Confidentiality
LOW
Integrity
NONE
Availability
NONE

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Kubernetes

Kubernetes

Affected Versions:

unspecified next of 1.20.11 unspecified next of 1.21.5 unspecified next of 1.22.2

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Confused Deputy in Kubernetes

GHSA-74j8-88mm-7496

Advisory Details

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.

Affected Packages

Go k8s.io/kubernetes
ECOSYSTEM: ≥0 ≤1.22.2

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-8561
WEB https://github.com/kubernetes/kubernetes/issues/104720
PACKAGE https://github.com/kubernetes/kubernetes
WEB https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY
WEB https://security.netapp.com/advisory/ntap-20211014-0002

Advisory provided by GitHub Security Advisory Database. Published: September 21, 2021, Modified: September 21, 2021

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/
Published: 2021-09-20T17:05:16.328714Z
Last Modified: 2024-09-16T22:29:49.855Z
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