Symlink Attack Affecting package, versions >=1.22.0 <1.22.2 >=1.21.0 <1.21.5 >=1.20.0 <1.20.11 <1.19.15



    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High
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8.1 high

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  • published 8 Oct 2021
  • disclosed 8 Oct 2021
  • credit Fabricio Voznika and Mark Wolters of Google

How to fix?

Upgrade to version 1.22.2, 1.21.5, 1.20.11, 1.19.15 or higher.

Overview is a package that contains the libraries that drive the Kubelet binary. The kubelet is responsible for node level pod management. It runs on each worker in the cluster.

Affected versions of this package are vulnerable to Symlink Attack. A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.