GHSA-55qj-gj3x-jq9r
First published: Wed Apr 24 2024(Updated: )
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 | Affected Version | How to fix |
|---|---|---|
| go/k8s.io/kubernetes/pkg/kubelet | >=1.18.0<1.18.6 | 1.18.6 |
| go/k8s.io/kubernetes/pkg/kubelet | >=1.17.0<1.17.9 | 1.17.9 |
| go/k8s.io/kubernetes/pkg/kubelet | >=1.1.0<1.16.13 | 1.16.13 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2020-8557
- https://github.com/kubernetes/kubernetes/issues/93032
- https://github.com/kubernetes/kubernetes/pull/92921
- https://github.com/kubernetes/kubernetes/commit/530f199b6e07cdaab32361e39709ac45f3fdc446
- https://github.com/kubernetes/kubernetes/commit/68750fefd3df76b7b008ef7b18e8acd18d5c2f2e
- https://github.com/kubernetes/kubernetes/commit/7fd849cffa2f93061fbcb0a6ae4efd0539b1e981
- https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ
- https://security.netapp.com/advisory/ntap-20200821-0002
- https://github.com/advisories/GHSA-55qj-gj3x-jq9r (Advisory)
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-55qj-gj3x-jq9r
- alias/CVE-2020-8557
- agent/software-canonical-lookup
- agent/weakness
- agent/references
- agent/last-modified-date
- agent/severity
- agent/softwarecombine
- agent/first-publish-date
- agent/type
- agent/event
- agent/description
- agent/tags
- collector/github-advisory
- package-manager/go