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Scenario #260
Security
K8s v1.24, GKE
Unrestricted Ingress Controller Allowing External Attacks
The ingress controller was misconfigured, allowing external attackers to bypass network security controls and exploit internal services.
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What Happened
The ingress controller was configured without proper access controls, allowing external users to directly access internal services. Attackers were able to target unprotected services within the cluster.
Diagnosis Steps
- 1Inspected the ingress configuration and found that it was accessible from any IP without authentication.
- 2Observed attack attempts to access internal services that were supposed to be restricted.
Root Cause
Ingress controller misconfiguration allowed external access to internal services without proper authentication or authorization.
Fix/Workaround
• Reconfigured the ingress controller to restrict access to trusted IPs or users via IP whitelisting or authentication.
• Enabled role-based access control (RBAC) to limit access to sensitive services.Lessons Learned
Always configure ingress controllers with proper access control mechanisms to prevent unauthorized access to internal services.
How to Avoid
- 1Use authentication and authorization mechanisms with ingress controllers to protect internal services.
- 2Regularly audit and update ingress configurations to ensure they align with security policies.