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Scenario #202
Security
K8s v1.19, AWS EKS
Insecure Network Policies Leading to Pod Exposure
Pods intended to be isolated were exposed to unauthorized traffic due to misconfigured network policies.
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What Happened
A network policy was meant to block communication between pods in different namespaces, but it was misconfigured, allowing unauthorized access between pods.
Diagnosis Steps
- 1Used kubectl get networkpolicy to check existing network policies.
- 2Observed that the network policy’s podSelector was incorrectly configured, allowing access between pods from different namespaces.
Root Cause
Misconfigured NetworkPolicy selectors allowed unwanted access between pods.
Fix/Workaround
• Corrected the NetworkPolicy by refining podSelector and applying stricter isolation.
• Tested the updated policy to confirm proper isolation between namespaces.Lessons Learned
Network policies must be carefully crafted to prevent unauthorized access between pods.
How to Avoid
- 1Implement and test network policies in a staging environment before applying to production.
- 2Regularly audit network policies to ensure they align with security requirements.