AmazonS3FilesFullAccess

Last Modified

Apr 7, 2026

April 7, 2026 at 01:04 PM UTC

Version

v1

Total Versions

1

Created

Apr 7, 2026

Actions

20

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Risk

Medium

The same capabilities in a scoped form, resource policy writes, reads across all data, or full access to a whole service. Read from this policy document alone: trust policies, boundaries and SCPs in your account still decide what actually succeeds. How this is assessed

  • Medium

    Can rewrite resource policies and sharing

    Grants 2 permissions management actions across 1 service (s3files) on any resource, enough to share resources outside the account.

    s3files:deletefilesystempolicys3files:putfilesystempolicy

    Use with caution: Turn on IAM Access Analyzer external access findings, and keep account-level guards like S3 Block Public Access enabled.

  • Medium

    Full s3files access on every resource

    Uses s3files:* with Resource "*" and no condition, so every action AWS adds to that service later is granted too.

    s3files:*

    Use with caution: The grant grows every time the service does. For long-lived access, prefer a policy that lists the actions you actually need.

Policy Document

View on GitHub
{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Sid": "S3FilesPermissions",
          "Effect": "Allow",
          "Action": "s3files:*",
          "Resource": "*"
        },
        {
          "Sid": "EC2NetworkingPermissions",
          "Effect": "Allow",
          "Action": [
            "ec2:DescribeSubnets",
            "ec2:DescribeNetworkInterfaces",
            "ec2:DescribeNetworkInterfaceAttribute",
            "ec2:CreateNetworkInterface",
            "ec2:DeleteNetworkInterface",
            "ec2:ModifyNetworkInterfaceAttribute",
            "ec2:DescribeSecurityGroups",
            "ec2:DescribeVpcs",
            "ec2:DescribeAvailabilityZones"
          ],
          "Resource": "*"
        },
        {
          "Sid": "S3BucketPermissions",
          "Effect": "Allow",
          "Action": [
            "s3:GetBucketNotification",
            "s3:PutBucketNotification"
          ],
          "Resource": "arn:aws:s3:::*"
        },
        {
          "Sid": "EventBridgeManage",
          "Effect": "Allow",
          "Action": [
            "events:DeleteRule",
            "events:PutRule",
            "events:PutTargets",
            "events:RemoveTargets"
          ],
          "Condition": {
            "StringEquals": {
              "events:ManagedBy": "elasticfilesystem.amazonaws.com"
            }
          },
          "Resource": [
            "arn:aws:events:*:*:rule/DO-NOT-DELETE-S3-Files*"
          ]
        },
        {
          "Sid": "EventBridgeRead",
          "Effect": "Allow",
          "Action": [
            "events:DescribeRule",
            "events:ListRules",
            "events:ListTargetsByRule"
          ],
          "Resource": [
            "arn:aws:events:*:*:rule/*"
          ]
        },
        {
          "Sid": "IAMPassRoleForS3Files",
          "Effect": "Allow",
          "Action": "iam:PassRole",
          "Resource": "arn:aws:iam::*:role/*",
          "Condition": {
            "StringEquals": {
              "iam:PassedToService": "elasticfilesystem.amazonaws.com"
            }
          }
        }
      ]
    },
    "VersionId": "v1",
    "IsDefaultVersion": true,
    "CreateDate": "2026-04-07T12:42:08+00:00"
  }
}

Version History (1 recorded)

Raw history
v1new policy

19 actions added

44a2f38
Permissions management: iam:PassRole: iam:PassRole