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Scenario #210
Security
K8s v1.20, Google Cloud
Insufficient Container Image Signing Leading to Unverified Deployments
Unverified container images were deployed due to the lack of image signing, exposing the cluster to potential malicious code.
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What Happened
Malicious code was deployed when a container image was pulled from a public registry without being properly signed or verified.
Diagnosis Steps
- 1Checked the image pull policies and found that image signing was not enabled for the container registry.
- 2Inspected the container image and found that it had not been signed.
Root Cause
Lack of image signing led to the deployment of unverified images.
Fix/Workaround
• Enabled image signing in the container registry and integrated it with Kubernetes for secure image verification.
• Re-pulled and deployed only signed images to the cluster.Lessons Learned
Always use signed images to ensure the integrity and authenticity of containers being deployed.
How to Avoid
- 1Implement image signing as part of the container build and deployment pipeline.
- 2Regularly audit deployed container images to verify their integrity.