CVE - CVE-2020-8557

CVE-ID
CVE-2020-8557	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://security.netapp.com/advisory/ntap-20200821-0002/ CONFIRM:https://github.com/kubernetes/kubernetes/issues/93032 URL:https://github.com/kubernetes/kubernetes/issues/93032 MLIST:[Security Advisory] CVE-2020-8557: Node disk DOS by writing to container /etc/hosts URL:https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ
Assigning CNA
Kubernetes
Date Record Created
20200203	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20200203)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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