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  5. GMS-2023-1177

GMS-2023-1177: A potential risk in clusternet which can be leveraged to make a cluster-level privilege escalation

April 21, 2023 (updated April 24, 2023)

Summary:

A potential risk in clusternet which can be leveraged to make a cluster-level privilege escalation.

Detailed analysis:

The clusternet has a deployment called cluster-hub inside the clusternet-system Kubernetes namespace, which runs on worker nodes randomly. The deployment has a service account called clusternet-hub, which has a cluster role called clusternet:hub via cluster role binding. The clusternet:hub cluster role has “” verbs of “.*” resources. Thus, if a malicious user can access the worker node which runs the clusternet, he/she can leverage the service account to do malicious actions to critical system resources. For example, he/she can leverage the service account to get ALL secrets in the entire cluster, resulting in cluster-level privilege escalation.

References

  • github.com/advisories/GHSA-833c-xh79-p429
  • github.com/clusternet/clusternet/releases/tag/v0.15.2
  • github.com/clusternet/clusternet/security/advisories/GHSA-833c-xh79-p429

Code Behaviors & Features

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Affected versions

All versions before 0.15.2

Fixed versions

  • v0.15.2

Solution

Upgrade to version 0.15.2 or above.

Weakness

  • CWE-269: Improper Privilege Management

Source file

go/github.com/clusternet/clusternet/GMS-2023-1177.yml

Spotted a mistake? Edit the file on GitLab.

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