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.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | Kubernetes | 1.15; 1.14; 1.13; 1.12; 1.11; 1.10; 1.9; 1.8; 1.7; 1.6; 1.5; 1.4; 1.3; 1.2; 1.1; >= 1.18, < 1.18.6; >= 1.17, < 1.17.9; >= 1.16, < 1.16.13 |
References
- https://github.com/kubernetes/kubernetes/issues/93032Issue Tracking, Patch, Third Party Advisory
- https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200821-0002/Third Party Advisory
- https://github.com/kubernetes/kubernetes/issues/93032Issue Tracking, Patch, Third Party Advisory
- https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200821-0002/Third Party Advisory
Timeline
- Published
- Jul 23, 2020
- Last modified
- Jun 17, 2026
- NVD status
- Modified