Resource Exhaustion Affecting openshift-hyperkube package, versions <0:4.4.0-202008250319.p0.git.0.d653415.el7


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.5% (39th percentile)

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  • Snyk IDSNYK-RHEL7-OPENSHIFTHYPERKUBE-3376409
  • published26 Mar 2023
  • disclosed15 Jul 2020

Introduced: 15 Jul 2020

CVE-2020-8557  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade RHEL:7 openshift-hyperkube to version 0:4.4.0-202008250319.p0.git.0.d653415.el7 or higher.
This issue was patched in RHSA-2020:3579.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshift-hyperkube package and not the openshift-hyperkube package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1