CVE-2020-8557
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Kubernetes | Kubernetes | 1.15 | affected |
| Kubernetes | Kubernetes | 1.14 | affected |
| Kubernetes | Kubernetes | 1.13 | affected |
| Kubernetes | Kubernetes | 1.12 | affected |
| Kubernetes | Kubernetes | 1.11 | affected |
| Kubernetes | Kubernetes | 1.10 | affected |
| Kubernetes | Kubernetes | 1.9 | affected |
| Kubernetes | Kubernetes | 1.8 | affected |
| Kubernetes | Kubernetes | 1.7 | affected |
| Kubernetes | Kubernetes | 1.6 | affected |
| Kubernetes | Kubernetes | 1.5 | affected |
| Kubernetes | Kubernetes | 1.4 | affected |
| Kubernetes | Kubernetes | 1.3 | affected |
| Kubernetes | Kubernetes | 1.2 | affected |
| Kubernetes | Kubernetes | 1.1 | affected |
| Kubernetes | Kubernetes | 1.18 < 1.18.6 | affected |
| Kubernetes | Kubernetes | 1.17 < 1.17.9 | affected |
| Kubernetes | Kubernetes | 1.16 < 1.16.13 | affected |
Weaknesses
- CWE-400: CWE-400 Uncontrolled Resource Consumption
ADP Enrichment
CVE Program Container
Additional References
- https://github.com/kubernetes/kubernetes/issues/93032
- https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ
- https://security.netapp.com/advisory/ntap-20200821-0002/
References
- https://github.com/kubernetes/kubernetes/issues/93032
- https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ
- https://security.netapp.com/advisory/ntap-20200821-0002/
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