Authorino, Uncontrolled Resource Consumption, CVE-2025-XXXX (Moderate)

How the CVE Works:

This vulnerability in Authorino arises due to improper handling of resource allocation when processing AuthPolicy evaluations. An attacker with developer-level access can craft malicious AuthPolicy configurations containing excessive or recursive rules, overwhelming the service’s CPU and memory. The lack of rate-limiting or input validation leads to uncontrolled resource consumption, causing a denial-of-service (DoS) condition. This disrupts authentication for all services relying on Authorino, effectively bypassing security policies cluster-wide.

DailyCVE Form:

Platform: Kubernetes (Authorino)
Version: <= v0.10.0
Vulnerability: Resource exhaustion via AuthPolicy
Severity: Moderate
Date: Jun 9, 2025

Prediction: Patch by Jul 15, 2025

What Undercode Say:

Exploitation:

1. Craft malicious `AuthPolicy` YAML with nested `when` conditions:

   spec:
   rules:</li>
   </ol>
   
   - when:
   - condition: "true"
   rules:
   - when: [...]
   

   2. Deploy policy via `kubectl`:

   kubectl apply -f malicious_policy.yaml -n authorino
   

   3. Monitor CPU/memory spikes:

   kubectl top pods -n authorino
   

   Mitigation:

   1. Apply temporary rate-limiting:

   // Authorino patch snippet
   func EvaluatePolicy(policy AuthPolicy) error {
   if len(policy.Rules) > 100 {
   return errors.New("rule limit exceeded")
   }
   }
   

   2. Restrict RBAC:

   kubectl create clusterrole authorino-edit --verb=update --resource=authpolicies
   

   3. Network-level throttling:

   istioctl apply -f - <<EOF
   apiVersion: networking.istio.io/v1alpha3
   kind: EnvoyFilter
   metadata:
   name: authorino-throttle
   spec:
   filters:
   - name: envoy.filters.http.local_ratelimit
   EOF
   

   Detection:

   1. Log analysis for policy loops:

   kubectl logs -n authorino -l app=authorino | grep -i "deep recursion"
   

   2. Prometheus alert for high CPU:

   alert: AuthorinoDoS
   expr: rate(container_cpu_usage_seconds_total{namespace="authorino"}[bash]) > 10
   

   Post-Patch:

   1. Upgrade command:

   helm upgrade authorino --version 0.10.1
   

   2. Verify fixes:

   kubectl get crd authpolicies.authorino.kubernetes.io -o jsonpath='{.spec.versions[].name}'
   

   Sources:

   Reported By: github.com
   Extra Source Hub:
   Undercode

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