Enforcing Least Privilege Access Using Parameter Store IAM Policies.

Introduction

In this solution, we will demonstrate how to enforce least privilege access using AWS Systems Manager Parameter Store and IAM policies with Pulumi in TypeScript. The key services involved in this solution are AWS Systems Manager Parameter Store, AWS Identity and Access Management (IAM), and Pulumi. AWS Systems Manager Parameter Store is a secure storage for configuration data management and secrets management. IAM policies allow you to manage access to AWS services and resources securely. Pulumi is an infrastructure as code tool that allows you to define and manage cloud resources using programming languages.

Step-by-Step Explanation

Step 1: Set Up Pulumi Project

1. Initialize a new Pulumi project in TypeScript.
2. Configure your AWS credentials.

Step 2: Create Parameter Store Parameters

1. Define the parameters you want to store in AWS Systems Manager Parameter Store.
2. Use Pulumi to create these parameters in your AWS account.

Step 3: Define IAM Policies

1. Create IAM policies that grant least privilege access to the parameters in Parameter Store.
2. Use Pulumi to define these IAM policies.

Step 4: Attach IAM Policies to Roles or Users

1. Create IAM roles or users that need access to the parameters.
2. Attach the IAM policies to these roles or users using Pulumi.

Key Points

• AWS Systems Manager Parameter Store is used to store configuration data and secrets securely.
• IAM policies should follow the principle of least privilege, granting only the necessary permissions to access the parameters.
• Pulumi allows you to define and manage cloud resources using familiar programming languages, making it easier to enforce best practices.

Conclusion

By following this solution, you can enforce least privilege access to your configuration data and secrets stored in AWS Systems Manager Parameter Store using IAM policies and Pulumi. This approach ensures that your resources are secure and only accessible by authorized entities, following the best practices of cloud security.

Full Code Example

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Create a new SSM Parameter
const parameter = new aws.ssm.Parameter("myParameter", {
    name: "/my/parameter",
    type: "String",
    value: "myParameterValue",
});

// Create an IAM Policy for least privilege access to the parameter
const policy = new aws.iam.Policy("myPolicy", {
    description: "Policy to allow access to SSM Parameter",
    policy: parameter.arn.apply(arn => JSON.stringify({
        Version: "2012-10-17",
        Statement: [
            {
                Effect: "Allow",
                Action: "ssm:GetParameter",
                Resource: arn,
            },
        ],
    })),
});

// Create an IAM Role
const role = new aws.iam.Role("myRole", {
    assumeRolePolicy: JSON.stringify({
        Version: "2012-10-17",
        Statement: [
            {
                Effect: "Allow",
                Principal: {
                    Service: "ec2.amazonaws.com",
                },
                Action: "sts:AssumeRole",
            },
        ],
    }),
});

// Attach the policy to the role
new aws.iam.RolePolicyAttachment("myRolePolicyAttachment", {
    role: role.name,
    policyArn: policy.arn,
});

// Create an IAM User
const user = new aws.iam.User("myUser", {});

// Attach the policy to the user
new aws.iam.UserPolicyAttachment("myUserPolicyAttachment", {
    user: user.name,
    policyArn: policy.arn,
});

// Export the ARNs
export const parameterArn = parameter.arn;
export const roleArn = role.arn;
export const userArn = user.arn;