AWS managed policies for Amazon S3

An AWS managed policy is a standalone policy that is created and administered by AWS. AWS managed policies are designed to provide permissions for many common use cases so that you can start assigning permissions to users, groups, and roles.

Keep in mind that AWS managed policies might not grant least-privilege permissions for your specific use cases because they're available for all AWS customers to use. We recommend that you reduce permissions further by defining customer managed policies that are specific to your use cases.

You cannot change the permissions defined in AWS managed policies. If AWS updates the permissions defined in an AWS managed policy, the update affects all principal identities (users, groups, and roles) that the policy is attached to. AWS is most likely to update an AWS managed policy when a new AWS service is launched or new API operations become available for existing services.

For more information, see AWS managed policies in the IAM User Guide.

AWS managed policy: AmazonS3FullAccess

You can attach the AmazonS3FullAccess policy to your IAM identities. This policy grants permissions that allow full access to Amazon S3.

To view the permissions for this policy, see AmazonS3FullAccess in the AWS Management Console.

AWS managed policy: AmazonS3ReadOnlyAccess

You can attach the AmazonS3ReadOnlyAccess policy to your IAM identities. This policy grants permissions that allow read-only access to Amazon S3.

To view the permissions for this policy, see AmazonS3ReadOnlyAccess in the AWS Management Console.

AWS managed policy: AmazonS3ObjectLambdaExecutionRolePolicy

Provides AWS Lambda functions the required permissions to send data to S3 Object Lambda when requests are made to an S3 Object Lambda access point. Also grants Lambda permissions to write to Amazon CloudWatch logs.

To view the permissions for this policy, see AmazonS3ObjectLambdaExecutionRolePolicy in the AWS Management Console.

AWS managed policy: S3UnlockBucketPolicy

If you incorrectly configured your bucket policy for a member account to deny all users access to your S3 bucket, you can use this AWS managed policy (S3UnlockBucketPolicy) to unlock the bucket. For more information on how to remove a misconfigured bucket policy that denies all principals from accessing an Amazon S3 bucket, see Perform a privileged task on an AWS Organizations member account in the AWS Identity and Access Management User Guide.

Amazon S3 updates to AWS managed policies

View details about updates to AWS managed policies for Amazon S3 since this service began tracking these changes.

Change	Description	Date
Amazon S3 added S3UnlockBucketPolicy	Amazon S3 added a new AWS-managed policy called S3UnlockBucketPolicy to unlock a bucket and remove a misconfigured bucket policy that denies all principals from accessing an Amazon S3 bucket.	November 1, 2024
Amazon S3 added Describe permissions to AmazonS3ReadOnlyAccess	Amazon S3 added s3:Describe* permissions to AmazonS3ReadOnlyAccess.	August 11, 2023
Amazon S3 added S3 Object Lambda permissions to AmazonS3FullAccess and AmazonS3ReadOnlyAccess	Amazon S3 updated the AmazonS3FullAccess and AmazonS3ReadOnlyAccess policies to include permissions for S3 Object Lambda.	September 27, 2021
Amazon S3 added AmazonS3ObjectLambdaExecutionRolePolicy	Amazon S3 added a new AWS-managed policy called AmazonS3ObjectLambdaExecutionRolePolicy that provides Lambda functions permissions to interact with S3 Object Lambda and write to CloudWatch logs.	August 18, 2021
Amazon S3 started tracking changes	Amazon S3 started tracking changes for its AWS managed policies.	August 18, 2021