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AWS STS Multiple Cross-Account Access Generator Using Boto3

This script provides a simple Python tool (main.py) for accessing AWS resources in multiple accounts using AWS Security Token Service (STS) to assume cross-account roles. The tool utilizes the boto3 library and includes configurations in the config.py file.

Prerequisites

Before using the script, make sure you have set up the necessary IAM roles in your source and destination AWS accounts to allow cross-account access. Follow these URLs to create an IAM role for assuming in the destination account:

Ensure that you have the required Python libraries installed by running:

pip install -r requirements.txt

Configuration

config.py

Edit the config.py file to include details about your AWS accounts and the roles you want to assume. Here is a sample configuration:

accountList = ['Account1']

accountConfig = {
    "Account1": {
        "id": "123456789012",
        "iamRoleArn": "arn:aws:iam::123456789012:role/role_access_account2",
        "regionList": ['us-east-1', 'us-east-2', 'us-west-1', 'us-west-2'],
    },
    "Account2": {
        "id": "1234567890XX",
        "iamRoleArn": "arn:aws:iam::1234567890XX:role/role_access_account2",
        "regionList": ['us-east-1', 'us-east-2', 'us-west-1', 'us-west-2'],
    }
}

Make sure to replace the placeholder values with your actual AWS account IDs, IAM role ARNs, and region lists.

Usage

Running the Script

Execute the main.py script to assume roles and access resources in the specified AWS accounts. The script will loop through the configured accounts and print information about EC2 instances:

python3 main.py

Notes

  • The script assumes the role specified in the iamRoleArn for each account.
  • AWS region defaults to 'us-east-1' but can be configured for each account in accountConfig.
  • The script uses AWS SDK's boto3 library, version 1.34.14.

Dependencies

  • boto3 - AWS SDK for Python
  • botocore - Low-level, data-driven core of boto3

License

This project is licensed under the MIT License - see the LICENSE file for details.

Usage Disclaimer and Considerations

  • This tool is a basic example and may need modifications based on specific use cases or security considerations.
  • Refer to the boto3 documentation for more information on AWS SDK for Python.
  • Important: Do not deploy this script in a production environment without thorough testing. Always ensure that the script meets your specific requirements and does not cause any unintended consequences.

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