cve.bz

CVE-2020-8557

5.5 mediumEPSS 0.4%

Medium (5.5) in kubernetes kubernetes. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in k8s.io/kubernetes/pkg/kubelet 1.16.13, 1.17.9, 1.18.6.

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.

Severity

CVSS 3.1

5.5 medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-31)
CWE
CWE-400
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-55qj-gj3x-jq9rGok8s.io/kubernetes/pkg/kubelet>=1.1.0 <1.16.131.16.13
GHSA-55qj-gj3x-jq9rGok8s.io/kubernetes/pkg/kubelet>=1.17.0 <1.17.91.17.9
GHSA-55qj-gj3x-jq9rGok8s.io/kubernetes/pkg/kubelet>=1.18.0 <1.18.61.18.6
GO-2024-2753Gok8s.io/kubernetes>=1.1.0 <1.16.13
>=1.17.0 <1.17.9
>=1.18.0 <1.18.6		1.16.13, 1.17.9, 1.18.6

References

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