Clusternet is a general-purpose system for controlling Kubernetes clusters across different environments. An issue in clusternet prior to version 0.15.2 can be leveraged to lead to a cluster-level privilege escalation. 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, they can leverage the service account to do malicious actions to critical system resources. For example, the malicious user can leverage the service account to get ALL secrets in the entire cluster, resulting in cluster-level privilege escalation. Version 0.15.2 contains a fix for this issue.
Published 2023-04-24 16:15:08
Updated 2023-05-04 12:53:56
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: Gain privilege

Exploit prediction scoring system (EPSS) score for CVE-2023-30622

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 7 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-30622

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
8.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
2.0
6.0
NIST
6.7
MEDIUM CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
0.8
5.3
GitHub, Inc.

CWE ids for CVE-2023-30622

  • The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
    Assigned by: security-advisories@github.com (Primary)

References for CVE-2023-30622

Products affected by CVE-2023-30622

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