Resource Exhaustion Affecting kubeadm package, versions <0:1.17.9-1.0.1.el7


Severity

Recommended
high

Based on Oracle Linux security rating

    Threat Intelligence

    EPSS
    0.04% (14th percentile)

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  • Snyk ID SNYK-ORACLE7-KUBEADM-2575624
  • published 10 Apr 2022
  • disclosed 23 Jul 2020

How to fix?

Upgrade Oracle:7 kubeadm to version 0:1.17.9-1.0.1.el7 or higher.
This issue was patched in ELSA-2020-5765.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kubeadm package and not the kubeadm package as distributed by Oracle. See How to fix? for Oracle: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 Scores

version 3.1
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NVD

5.5 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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Red Hat

5.5 medium
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SUSE

5.5 medium