Bug 2000366 (CVE-2020-8561) - CVE-2020-8561 kubernetes: Webhook redirect in kube-apiserver
Summary: CVE-2020-8561 kubernetes: Webhook redirect in kube-apiserver
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-8561
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2000368
Blocks: 2000367
TreeView+ depends on / blocked
 
Reported: 2021-09-02 01:13 UTC by Sam Fowler
Modified: 2021-10-06 12:21 UTC (History)
14 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in Kubernetes. This flaw allows an actor that controls the responses of the MutatingWebhookConfiguration or the ValidatingWebhookConfiguration requests to redirect kube-apiserver requests to the private network 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, potentially revealing sensitive information in its responses.
Clone Of:
Environment:
Last Closed: 2021-10-06 12:21:15 UTC


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Description Sam Fowler 2021-09-02 01:13:41 UTC
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.

Comment 3 Sam Fowler 2021-09-15 23:19:13 UTC
Upstream issue:

https://github.com/kubernetes/kubernetes/issues/104720

Comment 7 Product Security DevOps Team 2021-10-06 12:21:15 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-8561


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