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Date: Mon, 23 Mar 2020 11:37:19 -0700
From: Tim Allclair <>
	"Kubernetes developer/contributor discussion" <>,, 
	kubernetes-security-discuss <>,,
Subject: CVE-2020-8551, CVE-2020-8552: Kubernetes: Denial of service

Hello Kubernetes Community,

Two security issues were discovered in Kubernetes that could lead to a
recoverable denial of service.

*CVE-2020-8551* affects the kubelet, and has been rated *Medium *(

*CVE-2020-8552* affects the API server, and has also been rated *Medium* (
I vulnerable?
If an attacker can make an authorized resource request to an unpatched API
server (see below), then you may be vulnerable to CVE-2020-8552. If an
attacker can make an authorized request to an unpatched kubelet, then you
may be vulnerable to CVE-2020-8551.
CVE-2020-8551 affects:

   - kubelet v1.17.0 - v1.17.2
   - kubelet v1.16.0 - v1.16.6
   - kubelet v1.15.0 - v1.15.10\
   - *kubelets prior to v1.15.0 are unaffected*

CVE-2020-8552 affects:

   - kube-apiserver v1.17.0 - v1.17.2
   - kube-apiserver v1.16.0 - v1.16.6
   - kube-apiserver < v1.15.10

do I mitigate this vulnerability?

Prior to upgrading, these vulnerabilities can be mitigated by:

   - Preventing unauthenticated or unauthorized access to the affected
   - The apiserver and kubelet should auto restart in the event of an OOM

Both vulnerabilities are patched in kubernetes versions

   - v1.17.3
   - v1.16.7
   - v1.15.10

To upgrade, refer to the documentation:

See the GitHub issues for more details:


Thank You,

Tim Allclair on behalf of the Kubernetes Product Security Committee

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