AWSGreengrassResourceAccessRolePolicy

Last Modified

Mar 12, 2026

March 12, 2026 at 09:26 PM UTC

Version

Total Versions

Created

Nov 14, 2018

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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 read secrets
Reads Lambda environment variables, where credentials often live, on any resource with no condition.
lambda:GetFunctionConfiguration
Use with caution: Where the holder needs only some secrets, write your own policy scoped to their ARNs or tags, and limit decryption in the KMS key policies.
Medium
Full greengrass access on every resource
Uses greengrass:* with Resource "*" and no condition, so every action AWS adds to that service later is granted too.
greengrass:*
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

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101{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Sid": "AllowGreengrassAccessToShadows",
          "Action": [
            "iot:DeleteThingShadow",
            "iot:GetThingShadow",
            "iot:UpdateThingShadow"
          ],
          "Effect": "Allow",
          "Resource": [
            "arn:aws:iot:*:*:thing/GG_*",
            "arn:aws:iot:*:*:thing/*-gcm",
            "arn:aws:iot:*:*:thing/*-gda",
            "arn:aws:iot:*:*:thing/*-gci"
          ]
        },
        {
          "Sid": "AllowGreengrassToDescribeThings",
          "Action": [
            "iot:DescribeThing"
          ],
          "Effect": "Allow",
          "Resource": "arn:aws:iot:*:*:thing/*"
        },
        {
          "Sid": "AllowGreengrassToDescribeCertificates",
          "Action": [
            "iot:DescribeCertificate"
          ],
          "Effect": "Allow",
          "Resource": "arn:aws:iot:*:*:cert/*"
        },
        {
          "Sid": "AllowGreengrassToCallGreengrassServices",
          "Action": [
            "greengrass:*"
          ],
          "Effect": "Allow",
          "Resource": "*"
        },
        {
          "Sid": "AllowGreengrassToGetLambdaFunctions",
          "Action": [
            "lambda:GetFunction",
            "lambda:GetFunctionConfiguration"
          ],
          "Effect": "Allow",
          "Resource": "*"
        },
        {
          "Sid": "AllowGreengrassToGetGreengrassSecrets",
          "Action": [
            "secretsmanager:GetSecretValue"
          ],
          "Effect": "Allow",
          "Resource": "arn:aws:secretsmanager:*:*:secret:greengrass-*"
        },
        {
          "Sid": "AllowGreengrassAccessToS3Objects",
          "Action": [
            "s3:GetObject"
          ],
          "Effect": "Allow",
          "Resource": [
            "arn:aws:s3:::*Greengrass*",
            "arn:aws:s3:::*GreenGrass*",
            "arn:aws:s3:::*greengrass*",
            "arn:aws:s3:::*Sagemaker*",
            "arn:aws:s3:::*SageMaker*",
            "arn:aws:s3:::*sagemaker*"
          ]
        },
        {
          "Sid": "AllowGreengrassAccessToS3BucketLocation",
          "Action": [
            "s3:GetBucketLocation"
          ],
          "Effect": "Allow",
          "Resource": "*"
        },
        {
          "Sid": "AllowGreengrassAccessToSageMakerTrainingJobs",
          "Action": [
            "sagemaker:DescribeTrainingJob"
          ],
          "Effect": "Allow",
          "Resource": [
            "arn:aws:sagemaker:*:*:training-job/*"
          ]
        }
      ]
    },
    "VersionId": "v5",
    "IsDefaultVersion": true,
    "CreateDate": "2018-11-14T00:35:02+00:00"
  }
}