Symlink Attack Affecting github.com/kubernetes/kubernetes/pkg/kubelet Open this link in a new tab package, versions >=1.3.0 <1.7.14 >=1.8.0 <1.8.9 >=1.9.0 <1.9.4


0.0
medium
  • Attack Complexity

    Low

  • Availability

    High

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  • snyk-id

    SNYK-GOLANG-GITHUBCOMKUBERNETESKUBERNETESPKGKUBELET-2826200

  • published

    17 May 2022

  • disclosed

    17 May 2022

  • credit

    Joel Smith of Red Hat

How to fix?

Upgrade github.com/kubernetes/kubernetes/pkg/kubelet to version 1.7.14, 1.8.9, 1.9.4 or higher.

Overview

github.com/kubernetes/kubernetes/pkg/kubelet is a kubelet package.

Affected versions of this package are vulnerable to Symlink Attack due to a symlink race. Every synchronization iteration, the Atomic Writer is looking for files that shouldn't be in a volume, and when it finds it is added to a list. When the search is done it deletes the files in the list. Because the deletion doesn't occur during the finding of the file, a malicious container can set up conditions to change the file selected for deletion with a symlink leading to a different file, which will be deleted.