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Scenario #215
Security
K8s v1.21, GKE
Unrestricted Ingress Access to Sensitive Resources
Sensitive services were exposed to the public internet due to unrestricted ingress rules.
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What Happened
An ingress resource was misconfigured, exposing sensitive internal services such as the Kubernetes dashboard and internal APIs to the public.
Diagnosis Steps
- 1Inspected the ingress rules and found that they allowed traffic from all IPs (host: *).
- 2Confirmed that the services were critical and should not have been exposed to external traffic.
Root Cause
Misconfigured ingress resource allowed unrestricted access to sensitive services.
Fix/Workaround
• Restrict ingress traffic by specifying allowed IP ranges or adding authentication for access to sensitive resources.
• Used a more restrictive ingress controller and verified that access was limited to trusted sources.Lessons Learned
Always secure ingress access to critical resources by applying proper access controls.
How to Avoid
- 1Regularly review and audit ingress configurations to prevent exposing sensitive services.
- 2Implement access control lists (ACLs) and authentication for sensitive endpoints.