TLS Private Key Exposure in Self-Hosted Helm Configurations

Executive Summary

Under specific self-hosted Helm configurations, generated TLS private keys may be retained in rendered manifests accessible to highly privileged local users.

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Detection Guidance

Check rendered Helm manifests for retained TLS private keys in directories where Helm charts are deployed. Inspect files for sensitive key material using commands like grep -r 'BEGIN PRIVATE KEY' /path/to/helm/manifests or find / -type f -exec grep -l 'BEGIN PRIVATE KEY' {} \;. Review Helm chart templates for hardcoded key generation or storage.

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Impact Analysis

Highly privileged local users could access TLS private keys, potentially leading to decryption of sensitive communications or impersonation of services.

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Compliance Impact

This vulnerability could violate compliance requirements for data protection and encryption, such as GDPR's encryption standards or HIPAA's safeguards for protected health information.

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Mitigation Strategies

Review Helm configurations to ensure TLS private keys are not retained in rendered manifests. Restrict access to privileged local users and regenerate any exposed keys.

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