aws-iam-best-practices

# AWS IAM Best Practices Review and harden IAM policies following AWS security best practices and least privilege principles. ## When to Use Use this skill when you need to review IAM policies, implement least privilege access, or harden IAM security. ## Core Principles **Least Privilege** - Grant minimum permissions needed - Use managed policies when possible - Avoid wildcard (*) permissions - Regular access reviews **Defense in Depth** - Enable MFA for all users - Use IAM roles instead of access keys - Implement service control policies (SCPs) - Enable CloudTrail for audit **Separation of Duties** - Separate admin and user roles - Use different roles for different environments - Implement approval workflows - Regular permission audits ## IAM Security Checks ### Find Overly Permissive Policies ```bash # List policies with full admin access aws iam list-policies --scope Local \ --query 'Policies[*].[PolicyName,Arn]' --output table | \ grep -i admin # Find policies with wildcard actions aws iam list-policies --scope Local --query 'Policies[*].Arn' --output text | \ while read arn; do version=$(aws iam get-policy --policy-arn "$arn" \ --query 'Policy.DefaultVersionId' --output text) doc=$(aws iam get-policy-version --policy-arn "$arn" \ --version-id "$version" --query 'PolicyVersion.Document') if echo "$doc" | grep -q '"Action": "\*"'; then echo "Wildcard action in: $arn" fi done # Find inline policies (should use managed policies) aws iam lis...