CVE-2023-22645
📋 TL;DR
This vulnerability allows attackers with access to the kubewarden-controller ServiceAccount to read arbitrary Kubernetes secrets. It affects SUSE kubewarden deployments with kubewarden-controller versions prior to 1.6.0, potentially exposing sensitive cluster data.
💻 Affected Systems
- SUSE kubewarden
📦 What is this software?
Kubewarden Controller by Linuxfoundation
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all Kubernetes secrets in the cluster, leading to credential theft, data exfiltration, and lateral movement across the entire environment.
Likely Case
Unauthorized access to specific secrets that could contain API keys, passwords, certificates, or other sensitive configuration data.
If Mitigated
Limited impact if proper RBAC controls and network segmentation prevent unauthorized access to the kubewarden-controller ServiceAccount.
🎯 Exploit Status
Exploitation requires access to the kubewarden-controller ServiceAccount, which could be obtained through other vulnerabilities or misconfigurations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.0
Vendor Advisory: https://bugzilla.suse.com/show_bug.cgi?id=1210218
Restart Required: Yes
Instructions:
1. Update kubewarden-controller to version 1.6.0 or later. 2. Use kubectl apply with the updated manifests. 3. Verify the new version is running with kubectl get pods -n kubewarden.
🔧 Temporary Workarounds
Restrict ServiceAccount Access
linuxApply strict RBAC controls to limit which entities can access the kubewarden-controller ServiceAccount.
kubectl create rolebinding restricted-kubewarden --clusterrole=view --serviceaccount=kubewarden:kubewarden-controller --namespace=kubewarden
🧯 If You Can't Patch
- Implement network policies to isolate kubewarden-controller pods from other sensitive workloads.
- Regularly rotate all Kubernetes secrets and monitor for unauthorized access attempts.
🔍 How to Verify
Check if Vulnerable:
Check kubewarden-controller version with: kubectl get deployment -n kubewarden kubewarden-controller -o jsonpath='{.spec.template.spec.containers[0].image}'Check Version:
kubectl get deployment -n kubewarden kubewarden-controller -o jsonpath='{.spec.template.spec.containers[0].image}' | grep -o ':[0-9.]*'Verify Fix Applied:
Confirm version is 1.6.0 or higher with: kubectl get pods -n kubewarden -l app=kubewarden-controller -o jsonpath='{.items[*].spec.containers[*].image}'📡 Detection & Monitoring
Log Indicators:
- Unusual secret access patterns from kubewarden-controller ServiceAccount
- Failed RBAC authorization attempts for secret resources
Network Indicators:
- Unexpected outbound connections from kubewarden-controller pods to external services
SIEM Query:
source="kubernetes" AND (resource="secrets" AND user="system:serviceaccount:kubewarden:kubewarden-controller")