CVE-2020-8557
MEDIUM5.5EPSS 0.11%Denial of service in Kubernetes in k8s.io/kubernetes
Published: 4/24/2024Modified: 4/28/2026
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.
Affected packages (3)
- Debian/kubernetesfrom 0, < 1.18.5-1
- Go/k8s.io/kubernetes>= 1.1.0, < 1.16.13, >= 1.17.0, < 1.17.9, >= 1.18.0, < 1.18.6
- Go/k8s.io/kubernetes/pkg/kubelet>= 1.1.0, < 1.16.13
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References (12)
- ADVISORYhttps://github.com/advisories/GHSA-55qj-gj3x-jq9r
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-8557
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-8557
- PATCHhttps://github.com/kubernetes/kubernetes
- WEBhttps://github.com/kubernetes/kubernetes/commit/530f199b6e07cdaab32361e39709ac45f3fdc446
- WEBhttps://github.com/kubernetes/kubernetes/commit/68750fefd3df76b7b008ef7b18e8acd18d5c2f2e
- WEBhttps://github.com/kubernetes/kubernetes/commit/7fd849cffa2f93061fbcb0a6ae4efd0539b1e981
- WEBhttps://github.com/kubernetes/kubernetes/issues/93032
- WEBhttps://github.com/kubernetes/kubernetes/pull/92921
- WEBhttps://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ
- WEBhttps://pkg.go.dev/vuln/GO-2024-2753
- WEBhttps://security.netapp.com/advisory/ntap-20200821-0002