Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS01NXFqLWdqM3gtanE5cs4AA7Sg

Denial of service in Kubernetes

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.

Permalink: https://github.com/advisories/GHSA-55qj-gj3x-jq9r
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS01NXFqLWdqM3gtanE5cs4AA7Sg
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 10 days ago
Updated: 10 days ago

CVSS Score: 5.5
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Identifiers: GHSA-55qj-gj3x-jq9r, CVE-2020-8557
References:

• 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

Repository: https://github.com/kubernetes/kubernetes
Blast Radius: 1.0

Affected Packages