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A critical vulnerability dubbed #IngressNightmare (CVE-2025-1097) has been discovered in Ingress-NGINX, a core Kubernetes component. This unauthenticated Remote Code Execution (RCE) flaw enables attackers to escalate from zero permissions to full cluster takeover.
🔗 Reference: Wiz Research Blog
You Should Know:
1. Patch Immediately
Upgrade Ingress-NGINX to the latest patched version:
kubectl get deployments -n ingress-nginx kubectl set image deployment/ingress-nginx-controller -n ingress-nginx \ ingress-nginx-controller=registry.k8s.io/ingress-nginx/controller:v1.10.0
#### **2. Verify Mitigation**
Check if your cluster is exposed:
kubectl get ingressclasses -A kubectl describe ingressclass nginx
If `controller` field points to an outdated version, you are vulnerable.
#### **3. Restrict Ingress Access**
Apply **Network Policies** to limit ingress exposure:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: restrict-ingress
namespace: default
spec:
podSelector: {}
policyTypes:
- Ingress
ingress:
- from:
- namespaceSelector:
matchLabels:
role: trusted
#### **4. Monitor Suspicious Activity**
Use **Falco** or **KubeAudit** for real-time detection:
falco -r /etc/falco/falco_rules.yaml kubeaudit all --namespace ingress-nginx
#### **5. Harden Kubernetes RBAC**
Revoke unnecessary permissions:
kubectl auth can-i --list --as=system:anonymous kubectl delete clusterrolebinding permissive-binding
### **What Undercode Say**
This exploit highlights the risks of default configurations in Kubernetes. Always:
– Patch promptly
– Enforce least privilege
– Monitor ingress controllers
– Use admission controllers (e.g., OPA Gatekeeper)
🔧 **Critical Commands Recap:**
<h1>Check ingress-nginx version</h1> kubectl describe pod -n ingress-nginx | grep Image <h1>Block unauthorized access</h1> kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/cloud/deploy.yaml <h1>Log inspection</h1> journalctl -u kubelet --no-pager | grep "unexpected request"
### **Expected Output:**
A secure Kubernetes cluster with Ingress-NGINX patched, RBAC tightened, and continuous monitoring in place.
🔗 **Further Reading:**
References:
Reported By: Activity 7310365621492326401 – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
