OpenShift, Credential Exposure, CVE-2025-1234 (High)

How the CVE Works:

The vulnerability in OpenShift Hive, a component of Multicluster Engine (MCE) and Advanced Cluster Management (ACM), allows VCenter credentials to be exposed in the ClusterProvision object after provisioning a VSphere cluster. When a VSphere cluster is provisioned, sensitive credentials are stored in the ClusterProvision object. Users with read access to this object can extract these credentials, even without direct access to Kubernetes Secrets. This flaw enables unauthorized access to VCenter, potentially leading to cluster management and privilege escalation. The issue arises due to improper handling of sensitive data during the provisioning process, leaving credentials accessible to users with minimal permissions.

DailyCVE Form:

Platform: OpenShift Hive
Version: Multicluster Engine (MCE), Advanced Cluster Management (ACM)
Vulnerability: Credential Exposure
Severity: High
Date: Mar 17, 2025

What Undercode Say:

Exploitation:

1. Exploit Command:

Use `kubectl get clusterprovision -o yaml` to extract credentials from the ClusterProvision object.

kubectl get clusterprovision <provision-name> -o yaml | grep -i "credentials"

2. Exploit Code:

Automate credential extraction using Python:

import subprocess
output = subprocess.check_output([bash])
if "credentials" in output.decode():
print("Credentials found:", output.decode())

3. Impact:

Unauthorized users can access VCenter, manipulate clusters, and escalate privileges.

Protection:

1. Patch: Apply the latest OpenShift Hive patch addressing CVE-2025-1234.

   oc adm upgrade --to-latest
   

2. Access Control: Restrict read access to ClusterProvision objects using RBAC.

   apiVersion: rbac.authorization.k8s.io/v1
   kind: Role
   metadata:
   namespace: hive
   name: restricted-role
   rules:</li>
   </ol>
   
   - apiGroups: [bash]
   resources: [bash]
   verbs: [bash]
   

   3. Monitoring: Use Kubernetes audit logs to detect unauthorized access attempts.

   kubectl logs -n kube-system -l component=kube-apiserver --tail=100 | grep "clusterprovision"
   

   4. Credential Rotation: Rotate VCenter credentials immediately after patching.

   vcenter-cli rotate-credentials --cluster <cluster-name>
   

   5. Network Policies: Implement network policies to restrict access to VCenter.

   apiVersion: networking.k8s.io/v1
   kind: NetworkPolicy
   metadata:
   name: restrict-vcenter
   spec:
   podSelector:
   matchLabels:
   app: vcenter
   ingress:
   - from:
   - namespaceSelector:
   matchLabels:
   role: admin
   egress: []
   

   6. Security Best Practices:

   • Regularly review RBAC policies.
   • Encrypt sensitive data at rest and in transit.
   • Use Kubernetes Secrets for credential storage.
     By following these steps, organizations can mitigate the risks associated with CVE-2025-1234 and secure their OpenShift Hive environments.

   References:

   Reported By: https://github.com/advisories/GHSA-c339-mwfc-fmr2
   Extra Source Hub:
   Undercode

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