CVE-2020-8561

Published on: 09/20/2021 12:00:00 AM UTC

Last Modified on: 10/14/2021 09:15:00 AM UTC

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

Certain versions of Kubernetes from Kubernetes contain the following vulnerability:

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.

  • CVE-2020-8561 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 4.1 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW HIGH NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
CHANGED LOW NONE NONE

CVSS2 Score: 4 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK LOW SINGLE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL NONE NONE

CVE References

Description Tags Link
[Security Advisory] CVE-2020-8561: Webhook redirect in kube-apiserver groups.google.com
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URL Logo MISC groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY
CVE-2020-8561: Webhook redirect in kube-apiserver · Issue #104720 · kubernetes/kubernetes · GitHub github.com
text/html
URL Logo MISC github.com/kubernetes/kubernetes/issues/104720
CVE-2020-8561 Kubernetes Vulnerability in NetApp Products | NetApp Product Security security.netapp.com
text/html
URL Logo CONFIRM security.netapp.com/advisory/ntap-20211014-0002/

Exploit/POC from Github

PoC for exploiting CVE-2020-8561 : A security issue was discovered in Kubernetes where actors that control the respon…

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationKubernetesKubernetes1.20.11-AllAll
ApplicationKubernetesKubernetes1.21.5-AllAll
ApplicationKubernetesKubernetes1.22.2-AllAll
  • 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:-:*:*:*:*:*:*:

Discovery Credit

QiQi Xu

Social Mentions

Source Title Posted (UTC)
Twitter Icon @oss_security [kubernetes] CVE-2020-8561: Webhook redirect in kube-apiserver: Posted by Hausler, Micah on Sep 15Hello Kubernetes… twitter.com/i/web/status/1… 2021-09-16 07:13:03
Twitter Icon @CVEreport CVE-2020-8561 : A security issue was discovered in Kubernetes where actors that control the responses of MutatingWe… twitter.com/i/web/status/1… 2021-09-20 17:10:50
Reddit Logo Icon /r/kubernetes Two new Security Updates 2021-09-17 06:06:22
© CVE.report 2021 Twitter Nitter Twitter Viewer |

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