# Authorization Models in IAM Role based Attributed based AWS Identity and Access Management (IAM) supports different **authorization models** to control how users and services access AWS resources. SecureCart follows AWS best practices by implementing **role-based access control (RBAC), attribute-based access control (ABAC), and permission boundaries** to enforce **least privilege access** across multiple accounts. βœ” **Why SecureCart Needs IAM Authorization Models?** * **Ensures fine-grained access control across AWS environments.** * **Implements scalable access management using roles and policies.** * **Prevents privilege escalation and enforces security compliance.** * **Simplifies permissions management across multiple AWS accounts.** *** ### **πŸ”Ή Step 1: Understanding IAM Authorization Models** βœ” **AWS provides multiple authorization models for managing access control. SecureCart selects the right model based on security and scalability needs.** | **Authorization Model** | **Purpose** | **Key AWS Components** | **SecureCart Implementation** | | ----------------------------------------- | -------------------------------------------------------------------------------- | ---------------------------------------------------- | ------------------------------------------------------------------------------------------------------------ | | **Role-Based Access Control (RBAC)** | Grants access based on job roles and responsibilities. | IAM Roles, IAM Groups, IAM Policies | **SecureCart assigns IAM roles to Developers, Admins, and Security teams with predefined permission sets.** | | **Attribute-Based Access Control (ABAC)** | Grants access based on user attributes (e.g., department, project, environment). | IAM Policies with Tags, IAM Roles, AWS Organizations | **SecureCart tags IAM roles with attributes like `environment=prod` to restrict access dynamically.** | | **Permission Boundaries** | Defines the maximum permissions an IAM identity can have. | IAM Policies, IAM Roles | **SecureCart enforces permission boundaries to ensure developers cannot grant themselves admin privileges.** | | **Service Control Policies (SCPs)** | Restricts permissions across AWS accounts in an organization. | AWS Organizations, SCPs | **SecureCart applies SCPs to prevent root user access and restrict actions in production accounts.** | βœ… **Best Practices:**\ βœ” **Use RBAC for standard role-based permissions (e.g., Developer, Security Analyst).**\ βœ” **Leverage ABAC to dynamically assign permissions based on user attributes.**\ βœ” **Apply permission boundaries to prevent excessive privilege assignments.**\ βœ” **Use SCPs in AWS Organizations to enforce security policies across accounts.** *** ### **πŸ”Ή Step 2: Implementing Role-Based Access Control (RBAC) in SecureCart** βœ” **SecureCart grants access based on job roles using IAM roles and permission sets.** | **Role** | **Permissions** | **SecureCart Implementation** | | -------------------- | ------------------------------------------------- | --------------------------------------------------------------------------------------------------------- | | **Developer** | Read/write access to non-production environments. | **SecureCart developers assume an IAM role with `ReadOnlyAccess` to Production and `FullAccess` to Dev.** | | **Security Analyst** | Full access to AWS security services. | **SecureCart security teams have IAM roles with full access to AWS Security Hub, GuardDuty, and IAM.** | | **Admin** | Full access to all AWS services. | **SecureCart’s Cloud Administrators have elevated privileges through IAM roles.** | βœ… **Best Practices:**\ βœ” **Use IAM roles instead of IAM users to grant permissions.**\ βœ” **Apply least privilege by assigning only necessary permissions.**\ βœ” **Use permission sets in IAM Identity Center for cross-account RBAC.**\ βœ” **Monitor IAM role usage using AWS CloudTrail.** *** ### **πŸ”Ή Step 3: Implementing Attribute-Based Access Control (ABAC) in SecureCart** βœ” **SecureCart uses IAM policies with tags to enforce dynamic access control.** | **ABAC Strategy** | **Purpose** | **SecureCart Implementation** | | -------------------------------------------------------------- | ------------------------------------------ | -------------------------------------------------------------------------------------------------------- | | **Tag IAM roles with `environment=prod` or `environment=dev`** | Restricts access based on the environment. | **SecureCart allows only developers with `environment=dev` tags to deploy to Dev accounts.** | | **Use `department` tags to enforce permissions** | Assigns permissions based on department. | **SecureCart assigns IAM roles dynamically based on `department=engineering` or `department=security`.** | | **Combine ABAC with RBAC for granular control** | Provides flexible access management. | **SecureCart combines role-based IAM policies with ABAC to fine-tune permissions.** | βœ… **Best Practices:**\ βœ” **Use tags to manage permissions dynamically across multiple AWS accounts.**\ βœ” **Combine ABAC with RBAC to provide fine-grained access control.**\ βœ” **Restrict access based on attributes like `project`, `department`, or `environment`.**\ βœ” **Use IAM Access Analyzer to detect unintended public access.** *** ### **πŸ”Ή Step 4: Enforcing Permission Boundaries for SecureCart’s IAM Roles** βœ” **SecureCart prevents privilege escalation using permission boundaries.** | **Permission Boundary Strategy** | **Purpose** | **SecureCart Implementation** | | --------------------------------------------- | ------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ | | **Limit IAM Role Creation Privileges** | Prevents users from creating overly permissive roles. | **SecureCart enforces a permission boundary that prevents developers from assigning `AdministratorAccess`.** | | **Restrict Actions for Temporary Roles** | Ensures temporary credentials don’t exceed predefined permissions. | **SecureCart applies permission boundaries to AWS STS session policies.** | | **Apply Boundaries for Cross-Account Access** | Controls max permissions for assumed roles. | **SecureCart enforces permission boundaries to limit DevOps cross-account access.** | βœ… **Best Practices:**\ βœ” **Use permission boundaries to prevent users from escalating their own privileges.**\ βœ” **Combine permission boundaries with SCPs for multi-account governance.**\ βœ” **Restrict temporary session permissions using session policies.**\ βœ” **Monitor permission boundary violations using AWS IAM Access Analyzer.** *** ### **πŸ”Ή Step 5: Enforcing Multi-Account Governance with SCPs** βœ” **SecureCart applies SCPs to enforce security controls across all AWS accounts.** | **SCP Strategy** | **Purpose** | **SecureCart Implementation** | | -------------------------------------------------- | ----------------------------------------------------- | ------------------------------------------------------------------------ | | **Prevent IAM User Creation in Workload Accounts** | Ensures only IAM Identity Center (SSO) is used. | **SecureCart blocks IAM user creation in non-management accounts.** | | **Restrict Unapproved AWS Regions** | Ensures resources are deployed in approved locations. | **SecureCart limits deployments to `us-east-1` and `eu-west-1`.** | | **Deny CloudTrail Log Deletion** | Protects security logs from unauthorized changes. | **SecureCart prevents security logs from being deleted in any account.** | βœ… **Best Practices:**\ βœ” **Apply SCPs at the Organizational Unit (OU) level for centralized policy enforcement.**\ βœ” **Use SCPs to restrict critical actions like disabling CloudTrail and IAM changes.**\ βœ” **Regularly review and update SCPs to align with security best practices.**\ βœ” **Ensure SCPs do not override necessary permissions for required workflows.** *** ### **πŸ”Ή Step 6: Monitoring & Auditing IAM Authorization Models** βœ” **SecureCart ensures access security through continuous monitoring and auditing.** | **AWS Monitoring Tool** | **Purpose** | **SecureCart Implementation** | | --------------------------- | --------------------------------------------------------------- | ----------------------------------------------------------------------- | | **AWS IAM Access Analyzer** | Detects unintended public access and cross-account permissions. | **SecureCart scans IAM policies for overly permissive configurations.** | | **AWS CloudTrail** | Logs all IAM role assumptions and API calls. | **SecureCart tracks IAM role usage across accounts.** | | **AWS Config** | Monitors compliance with IAM best practices. | **SecureCart flags non-compliant IAM policy changes.** | | **AWS Security Hub** | Aggregates security findings across multiple accounts. | **SecureCart centralizes security monitoring for IAM-related threats.** | βœ… **Best Practices:**\ βœ” **Use IAM Access Analyzer to detect unintended public and cross-account access.**\ βœ” **Monitor CloudTrail logs to track IAM role assumptions and API calls.**\ βœ” **Enable AWS Config to detect unauthorized IAM policy modifications.**\ βœ” **Use AWS Security Hub to centralize IAM security alerts.** *** ### **πŸš€ Summary** βœ” **Use RBAC to assign permissions based on roles and job functions.**\ βœ” **Leverage ABAC to grant dynamic permissions based on user attributes and tags.**\ βœ” **Apply permission boundaries to prevent privilege escalation.**\ βœ” **Use SCPs to enforce security guardrails across AWS accounts.**\ βœ” **Continuously monitor IAM authorization models using AWS IAM Access Analyzer, CloudTrail, and AWS Config.**