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WS-2023-0110
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Date: April 21, 2023
A potential risk in clusternet which can be leveraged to make a cluster-level privilege escalation in clusternet prior to 0.15.2. 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.
Language: Go
Severity Score
Severity Score
Weakness Type (CWE)
Improper Privilege Management
CWE-269Top Fix
CVSS v3.1
Base Score: |
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Attack Vector (AV): | LOCAL |
Attack Complexity (AC): | HIGH |
Privileges Required (PR): | HIGH |
User Interaction (UI): | NONE |
Scope (S): | CHANGED |
Confidentiality (C): | HIGH |
Integrity (I): | LOW |
Availability (A): | LOW |