AWSSSOMasterAccountAdministrator

Last Modified

Mar 12, 2026

March 12, 2026 at 09:26 PM UTC

Version

v13

Total Versions

Created

Feb 12, 2026

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Risk

High

An unrestricted escalation path, identity administration, secret reads or the power to switch off security monitoring. Read from this policy document alone: trust policies, boundaries and SCPs in your account still decide what actually succeeds. How this is assessed

High
Can change identities and their permissions
Grants 46 permissions management actions on IAM, IAM Identity Center or Organizations, on any resource with no condition.
sso-directory:addmembertogroupsso-directory:createaliassso-directory:creategroupsso-directory:createusersso-directory:deletegroupsso-directory:deleteusersso-directory:disableusersso-directory:enableusersso-directory:removememberfromgroupsso-directory:updategroupsso-directory:updatepasswordsso-directory:updateuserand 34 more
Use with caution: Grant it only to identity administrators, and protect your admin roles and SCPs with a permissions boundary or an SCP of their own.
Medium
Full access to 4 services on every resource
Uses identitystore:*, identitystore-auth:*, sso:*, sso-directory:* with Resource "*" and no condition, so every action AWS adds to those services later is granted too.
identitystore:*identitystore-auth:*sso:*sso-directory:*
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.

IAM Access Analyzer (2)

Suggestion / EQUIVALENT_TO_NULL_FALSE
We recommend replacing the key kms:EncryptionContext:aws:sso:instance-arn in the condition block of StringLike with {kms:EncryptionContext:aws:sso:instance-arn: false} to ensure better enforcement of the condition. AWS docs
Suggestion / EQUIVALENT_TO_NULL_FALSE
We recommend replacing the key kms:EncryptionContext:aws:identitystore:identitystore-arn in the condition block of StringLike with {kms:EncryptionContext:aws:identitystore:identitystore-arn: false} to ensure better enforcement of the condition. AWS docs

Policy Document

View on GitHub

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129{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Sid": "AWSSSOCreateSLR",
          "Effect": "Allow",
          "Action": "iam:CreateServiceLinkedRole",
          "Resource": "arn:aws:iam::*:role/aws-service-role/sso.amazonaws.com/AWSServiceRoleForSSO",
          "Condition": {
            "StringLike": {
              "iam:AWSServiceName": "sso.amazonaws.com"
            }
          }
        },
        {
          "Sid": "AWSSSOMasterAccountAdministrator",
          "Effect": "Allow",
          "Action": "iam:PassRole",
          "Resource": "arn:aws:iam::*:role/aws-service-role/sso.amazonaws.com/AWSServiceRoleForSSO",
          "Condition": {
            "StringLike": {
              "iam:PassedToService": "sso.amazonaws.com"
            }
          }
        },
        {
          "Sid": "AWSSSOMemberAccountAdministrator",
          "Effect": "Allow",
          "Action": [
            "ds:DescribeTrusts",
            "ds:UnauthorizeApplication",
            "ds:DescribeDirectories",
            "ds:AuthorizeApplication",
            "iam:ListPolicies",
            "organizations:EnableAWSServiceAccess",
            "organizations:ListRoots",
            "organizations:ListAccounts",
            "organizations:ListOrganizationalUnitsForParent",
            "organizations:ListAccountsForParent",
            "organizations:DescribeOrganization",
            "organizations:ListChildren",
            "organizations:DescribeAccount",
            "organizations:ListParents",
            "organizations:ListDelegatedAdministrators",
            "sso:*",
            "sso-directory:*",
            "identitystore:*",
            "identitystore-auth:*",
            "ds:CreateAlias",
            "access-analyzer:ValidatePolicy",
            "signin:CreateTrustedIdentityPropagationApplicationForConsole",
            "signin:ListTrustedIdentityPropagationApplicationsForConsole"
          ],
          "Resource": "*"
        },
        {
          "Sid": "AWSSSOManageDelegatedAdministrator",
          "Effect": "Allow",
          "Action": [
            "organizations:RegisterDelegatedAdministrator",
            "organizations:DeregisterDelegatedAdministrator"
          ],
          "Resource": "*",
          "Condition": {
            "StringEquals": {
              "organizations:ServicePrincipal": "sso.amazonaws.com"
            }
          }
        },
        {
          "Sid": "AllowDeleteSyncProfile",
          "Effect": "Allow",
          "Action": [
            "identity-sync:DeleteSyncProfile"
          ],
          "Resource": [
            "arn:aws:identity-sync:*:*:profile/*"
          ]
        },
        {
          "Sid": "AllowKMSKeyUseViaAWSIAMIdentityCenterService",
          "Effect": "Allow",
          "Action": [
            "kms:GenerateDataKeyWithoutPlaintext",
            "kms:Encrypt",
            "kms:Decrypt"
          ],
          "Resource": "*",
          "Condition": {
            "StringLike": {
              "kms:ViaService": "sso.*.amazonaws.com",
              "kms:EncryptionContext:aws:sso:instance-arn": "*"
            }
          }
        },
        {
          "Sid": "AllowKMSKeyUseViaAWSIdentityStoreService",
          "Effect": "Allow",
          "Action": [
            "kms:GenerateDataKeyWithoutPlaintext",
            "kms:Encrypt",
            "kms:Decrypt"
          ],
          "Resource": "*",
          "Condition": {
            "StringLike": {
              "kms:ViaService": "identitystore.*.amazonaws.com",
              "kms:EncryptionContext:aws:identitystore:identitystore-arn": "*"
            }
          }
        },
        {
          "Sid": "AllowKMSKeyDiscovery",
          "Effect": "Allow",
          "Action": [
            "kms:ListAliases",
            "kms:DescribeKey"
          ],
          "Resource": "*"
        }
      ]
    },
    "VersionId": "v13",
    "IsDefaultVersion": true,
    "CreateDate": "2026-02-12T18:01:23+00:00"
  }
}