Source: Tenable Blog Author: Lior Zatlavi URL: https://www.tenable.com/blog/creating-elegant-azure-custom-roles-putting-notactions-into-action
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ONE SENTENCE SUMMARY: Using Azure’s “NotActions” and “NotDataActions” attributes simplifies custom Role creation, making them more manageable, secure, and efficient.
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MAIN POINTS:
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Azure RBAC enables assigning permissions via built-in or custom Roles using JSON-based role definitions.
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“Actions” and “DataActions” define allowed control plane and data plane operations, respectively.
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“NotActions” and “NotDataActions” exclude specific permissions from those granted in “Actions” and “DataActions.”
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Wildcards (*) help simplify permission definitions by grouping multiple related actions.
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“NotActions” is not a deny rule; permissions excluded here can still be granted in other assignments.
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Tenable Cloud Security analyzes permissions and suggests least-privileged custom Roles based on actual usage.
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Automatically generated least-privileged Roles reduce security risks by limiting unnecessary permissions.
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Using “NotActions” significantly reduces Role definition size, improving readability and manageability.
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Compact, structured Roles make debugging and auditing permissions much easier.
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Testing in a lower environment before applying custom Roles in production is crucial for security.
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TAKEAWAYS:
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Leveraging “NotActions” and “NotDataActions” streamlines custom Role creation and enhances security.
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Wildcards simplify permission management by avoiding lengthy, repetitive role definitions.
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Least-privileged Roles mitigate security risks by restricting unnecessary access.
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Tenable Cloud Security automates permission analysis and generates optimized Role suggestions.
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Properly structured custom Roles improve operational efficiency and ease of maintenance.