Privilege Escalation via Secret Copy in Multicloud Operators Subscription

Executive Summary

This vulnerability in multicloud-operators-subscription allows a privileged namespace administrator to copy sensitive Secret contents from other namespaces into their own by manipulating the Channel.Spec.SecretRef.Namespace field. This leads to unauthorized information disclosure.

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Detection Guidance

To detect this vulnerability, review Kubernetes cluster audit logs for unauthorized Secret access attempts. Check for namespace administrators creating Channel or Subscription resources with manipulated Channel.Spec.SecretRef.Namespace fields. Use commands like 'kubectl get channels -A' and 'kubectl get subscriptions -A' to inspect resource configurations. Monitor for Secrets copied to unexpected namespaces.

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Impact Analysis

If you are a namespace administrator with permissions to create Channel and Subscription resources, an attacker could exploit this to access sensitive data from other namespaces. Even if you are not an administrator, your data could be exposed if an untrusted admin misuses this flaw.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements such as GDPR and HIPAA. It may result in data breaches, unauthorized disclosure, and failure to meet confidentiality obligations.

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Mitigation Strategies

Immediately restrict namespace administrator permissions to prevent creation of Channel and Subscription resources. Review and revoke any untrusted administrator access. Monitor for unauthorized Secret copies across namespaces. Consider isolating sensitive namespaces until patches are applied. Red Hat has not provided official mitigation options meeting their criteria.

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