EC2 Image Builder identity-based policy examples - EC2 Image Builder

EC2 Image Builder identity-based policy examples

By default, IAM users and roles don't have permission to create or modify Image Builder resources. They also can't perform tasks using the AWS Management Console, AWS CLI, or AWS API. An IAM administrator must create IAM policies that grant users and roles permission to perform specific API operations on the specified resources they need. The administrator must then attach those policies to the IAM users or groups that require those permissions.

To learn how to create an IAM identity-based policy using JSON policy documents, see Creating Policies on the JSON Tab in the IAM User Guide.

Policy best practices

Identity-based policies are very powerful. They determine whether someone can create, access, or delete EC2 Image Builder resources in your account. These actions can incur costs for your AWS account. When you create or edit identity-based policies, follow these guidelines and recommendations:

  • Get Started Using AWS Managed Policies – To start using EC2 Image Builder quickly, use AWS managed policies to give your employees the permissions they need. These policies are already available in your account and are maintained and updated by AWS. For more information, see Get Started Using Permissions With AWS Managed Policies in the IAM User Guide.

  • Grant Least Privilege – When you create custom policies, grant only the permissions required to perform a task. Start with a minimum set of permissions and grant additional permissions as necessary. Doing so is more secure than starting with permissions that are too lenient and then trying to tighten them later. For more information, see Grant Least Privilege in the IAM User Guide.

  • Enable MFA for Sensitive Operations – For extra security, require IAM users to use multi-factor authentication (MFA) to access sensitive resources or API operations. For more information, see Using Multi-Factor Authentication (MFA) in AWS in the IAM User Guide.

  • Use Policy Conditions for Extra Security – To the extent that it's practical, define the conditions under which your identity-based policies allow access to a resource. For example, you can write conditions to specify a range of allowable IP addresses that a request must come from. You can also write conditions to allow requests only within a specified date or time range, or to require the use of SSL or MFA. For more information, see IAM JSON Policy Elements: Condition in the IAM User Guide.

Using the Image Builder console

To access the EC2 Image Builder console, you must have a minimum set of permissions. These permissions must allow you to list and view details about the Image Builder resources in your AWS account. If you create an identity-based policy that is more restrictive than the minimum required permissions, the console won't function as intended for entities (IAM users or roles) with that policy.

To ensure that those entities can still use the Image Builder console, also attach one of the following AWS managed policies to the entities. For more information, see Adding Permissions to a User in the IAM User Guide:

AWSImageBuilderReadOnlyAccess

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "imagebuilder:Get*", "imagebuilder:List*" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "iam:GetRole" ], "Resource": "arn:aws:iam::*:role/aws-service-role/imagebuilder.amazonaws.com/AWSServiceRoleForImageBuilder" } ] }

AWSImageBuilderFullAccess

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "imagebuilder:*" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "sns:ListTopics" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "sns:Publish" ], "Resource": "arn:aws:sns:*:*:*imagebuilder*" }, { "Effect": "Allow", "Action": [ "license-manager:ListLicenseConfigurations", "license-manager:ListLicenseSpecificationsForResource" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "iam:GetRole" ], "Resource": "arn:aws:iam::*:role/aws-service-role/imagebuilder.amazonaws.com/AWSServiceRoleForImageBuilder" }, { "Effect": "Allow", "Action": [ "iam:GetInstanceProfile" ], "Resource": "arn:aws:iam::*:instance-profile/*imagebuilder*" }, { "Effect": "Allow", "Action": [ "iam:ListInstanceProfiles", "iam:ListRoles" ], "Resource": "*" }, { "Effect": "Allow", "Action": "iam:PassRole", "Resource": [ "arn:aws:iam::*:instance-profile/*imagebuilder*", "arn:aws:iam::*:role/*imagebuilder*" ], "Condition": { "StringEquals": { "iam:PassedToService": "ec2.amazonaws.com" } } }, { "Effect": "Allow", "Action": [ "s3:ListAllMyBuckets", "s3:GetBucketLocation" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "s3:ListBucket" ], "Resource": "arn:aws:s3::*:*imagebuilder*" }, { "Action": "iam:CreateServiceLinkedRole", "Effect": "Allow", "Resource": "arn:aws:iam::*:role/aws-service-role/imagebuilder.amazonaws.com/AWSServiceRoleForImageBuilder", "Condition": { "StringLike": { "iam:AWSServiceName": "imagebuilder.amazonaws.com" } } }, { "Effect": "Allow", "Action": [ "ec2:DescribeImages", "ec2:DescribeVpcs", "ec2:DescribeRegions", "ec2:DescribeVolumes", "ec2:DescribeSubnets", "ec2:DescribeKeyPairs", "ec2:DescribeSecurityGroups" ], "Resource": "*" } ] }
Important

In addition to the AWSImageBuilderFullAccess policy, you must attach the following custom policy and include the resources you want to use that do not have "imagebuilder" in the resource name:

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "sns:Publish" ], "Resource": "sns topic arn" }, { "Effect": "Allow", "Action": [ "iam:GetInstanceProfile" ], "Resource": "instance profile role arn" }, { "Effect": "Allow", "Action": "iam:PassRole", "Resource": "instance profile role arn" "Condition": { "StringEquals": { "iam:PassedToService": "ec2.amazonaws.com" } } }, { "Effect": "Allow", "Action": [ "s3:ListBucket" ], "Resource": "bucket arn" } ] }

You don't need to allow minimum console permissions for users that are making calls to only the AWS CLI or the AWS API. Instead, allow access to only the actions that match the API operation that you're trying to perform.