AmazonVPCCrossAccountNetworkInterfaceOperations

Last Modified

Mar 12, 2026

March 12, 2026 at 09:28 PM UTC

Version

Total Versions

Created

Sep 25, 2023

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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 (ec2) on any resource, enough to share resources outside the account.
ec2:createnetworkinterfacepermissionec2:deletenetworkinterfacepermission
Use with caution: Turn on IAM Access Analyzer external access findings, and keep account-level guards like S3 Block Public Access enabled.

Policy Document

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64{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Action": [
            "ec2:DescribeRouteTables",
            "ec2:CreateRoute",
            "ec2:DeleteRoute",
            "ec2:ReplaceRoute"
          ],
          "Resource": [
            "*"
          ]
        },
        {
          "Effect": "Allow",
          "Action": [
            "ec2:DescribeNetworkInterfaces",
            "ec2:CreateNetworkInterface",
            "ec2:DeleteNetworkInterface",
            "ec2:CreateNetworkInterfacePermission",
            "ec2:DeleteNetworkInterfacePermission",
            "ec2:DescribeNetworkInterfacePermissions",
            "ec2:ModifyNetworkInterfaceAttribute",
            "ec2:DescribeNetworkInterfaceAttribute",
            "ec2:DescribeAvailabilityZones",
            "ec2:DescribeRegions",
            "ec2:DescribeVpcs",
            "ec2:DescribeSubnets"
          ],
          "Resource": [
            "*"
          ]
        },
        {
          "Effect": "Allow",
          "Action": [
            "ec2:AssignPrivateIpAddresses",
            "ec2:UnassignPrivateIpAddresses"
          ],
          "Resource": [
            "*"
          ]
        },
        {
          "Effect": "Allow",
          "Action": [
            "ec2:AssignIpv6Addresses",
            "ec2:UnassignIpv6Addresses"
          ],
          "Resource": [
            "*"
          ]
        }
      ]
    },
    "VersionId": "v5",
    "IsDefaultVersion": true,
    "CreateDate": "2023-09-25T15:12:17+00:00"
  }
}