AmazonECSServiceRolePolicy

Last Modified

Apr 23, 2026

April 23, 2026 at 12:03 AM UTC

Version

v24

Total Versions

Created

Apr 22, 2026

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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 take over existing resources that run as another role
Grants the actions of 1 documented escalation path, but only on named resources or under a condition. Review that scope before trusting it.
- ssm-001ssm:StartSessionscoped
  - ssm:StartSession: on arn:aws:ecs:*:*:task/*, arn:aws:ssm:*:*:document/AmazonECS-ExecuteInteractiveCommand
Use with caution: Check which roles, users or policies fall inside the scope shown above. Within it the escalation works as documented, so keep privileged principals out of it.
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.

IAM Access Analyzer (1)

Suggestion / EQUIVALENT_TO_NULL_FALSE
We recommend replacing the key aws:RequestTag/AmazonECSManaged in the condition block of StringLike with {aws:RequestTag/AmazonECSManaged: false} to ensure better enforcement of the condition. AWS docs

Policy Document

View on GitHub

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249{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Sid": "ECSTaskManagement",
          "Effect": "Allow",
          "Action": [
            "ec2:AttachNetworkInterface",
            "ec2:AssociateTrunkInterface",
            "ec2:CreateNetworkInterface",
            "ec2:CreateNetworkInterfacePermission",
            "ec2:DeleteNetworkInterface",
            "ec2:DeleteNetworkInterfacePermission",
            "ec2:Describe*",
            "ec2:DetachNetworkInterface",
            "ec2:DisassociateTrunkInterface",
            "elasticloadbalancing:DeregisterInstancesFromLoadBalancer",
            "elasticloadbalancing:DeregisterTargets",
            "elasticloadbalancing:Describe*",
            "elasticloadbalancing:RegisterInstancesWithLoadBalancer",
            "elasticloadbalancing:RegisterTargets",
            "route53:ChangeResourceRecordSets",
            "route53:CreateHealthCheck",
            "route53:DeleteHealthCheck",
            "route53:Get*",
            "route53:List*",
            "route53:UpdateHealthCheck",
            "servicediscovery:DeregisterInstance",
            "servicediscovery:Get*",
            "servicediscovery:List*",
            "servicediscovery:RegisterInstance",
            "servicediscovery:UpdateInstanceCustomHealthStatus"
          ],
          "Resource": "*"
        },
        {
          "Sid": "AutoScaling",
          "Effect": "Allow",
          "Action": [
            "autoscaling:Describe*"
          ],
          "Resource": "*"
        },
        {
          "Sid": "AutoScalingManagement",
          "Effect": "Allow",
          "Action": [
            "autoscaling:DeletePolicy",
            "autoscaling:PutScalingPolicy",
            "autoscaling:SetInstanceProtection",
            "autoscaling:UpdateAutoScalingGroup",
            "autoscaling:PutLifecycleHook",
            "autoscaling:DeleteLifecycleHook",
            "autoscaling:CompleteLifecycleAction",
            "autoscaling:RecordLifecycleActionHeartbeat",
            "autoscaling:TerminateInstanceInAutoScalingGroup"
          ],
          "Resource": "*",
          "Condition": {
            "Null": {
              "autoscaling:ResourceTag/AmazonECSManaged": "false"
            }
          }
        },
        {
          "Sid": "AutoScalingPlanManagement",
          "Effect": "Allow",
          "Action": [
            "autoscaling-plans:CreateScalingPlan",
            "autoscaling-plans:DeleteScalingPlan",
            "autoscaling-plans:DescribeScalingPlans",
            "autoscaling-plans:DescribeScalingPlanResources"
          ],
          "Resource": "*"
        },
        {
          "Sid": "EventBridge",
          "Effect": "Allow",
          "Action": [
            "events:DescribeRule",
            "events:ListTargetsByRule"
          ],
          "Resource": "arn:aws:events:*:*:rule/ecs-managed-*"
        },
        {
          "Sid": "EventBridgeRuleManagement",
          "Effect": "Allow",
          "Action": [
            "events:PutRule",
            "events:PutTargets"
          ],
          "Resource": "*",
          "Condition": {
            "StringEquals": {
              "events:ManagedBy": "ecs.amazonaws.com"
            }
          }
        },
        {
          "Sid": "CWAlarmManagement",
          "Effect": "Allow",
          "Action": [
            "cloudwatch:DeleteAlarms",
            "cloudwatch:DescribeAlarms",
            "cloudwatch:PutMetricAlarm"
          ],
          "Resource": "arn:aws:cloudwatch:*:*:alarm:*"
        },
        {
          "Sid": "ECSTagging",
          "Effect": "Allow",
          "Action": [
            "ec2:CreateTags"
          ],
          "Resource": "arn:aws:ec2:*:*:network-interface/*"
        },
        {
          "Sid": "CWLogGroupManagement",
          "Effect": "Allow",
          "Action": [
            "logs:CreateLogGroup",
            "logs:DescribeLogGroups",
            "logs:PutRetentionPolicy"
          ],
          "Resource": "arn:aws:logs:*:*:log-group:/aws/ecs/*"
        },
        {
          "Sid": "CWLogStreamManagement",
          "Effect": "Allow",
          "Action": [
            "logs:CreateLogStream",
            "logs:DescribeLogStreams",
            "logs:PutLogEvents"
          ],
          "Resource": "arn:aws:logs:*:*:log-group:/aws/ecs/*:log-stream:*"
        },
        {
          "Sid": "ExecuteCommandSessionManagement",
          "Effect": "Allow",
          "Action": [
            "ssm:DescribeSessions"
          ],
          "Resource": "*"
        },
        {
          "Sid": "ExecuteCommand",
          "Effect": "Allow",
          "Action": [
            "ssm:StartSession"
          ],
          "Resource": [
            "arn:aws:ecs:*:*:task/*",
            "arn:aws:ssm:*:*:document/AmazonECS-ExecuteInteractiveCommand"
          ]
        },
        {
          "Sid": "OpenDataChannel",
          "Effect": "Allow",
          "Action": [
            "ssmmessages:OpenDataChannel"
          ],
          "Resource": [
            "arn:aws:ssm:*:*:session/*"
          ],
          "Condition": {
            "StringEquals": {
              "aws:PrincipalAccount": "${aws:ResourceAccount}"
            }
          }
        },
        {
          "Sid": "CloudMapResourceCreation",
          "Effect": "Allow",
          "Action": [
            "servicediscovery:CreateHttpNamespace",
            "servicediscovery:CreateService"
          ],
          "Resource": "*",
          "Condition": {
            "ForAllValues:StringEquals": {
              "aws:TagKeys": [
                "AmazonECSManaged"
              ]
            }
          }
        },
        {
          "Sid": "CloudMapResourceTagging",
          "Effect": "Allow",
          "Action": "servicediscovery:TagResource",
          "Resource": "*",
          "Condition": {
            "StringLike": {
              "aws:RequestTag/AmazonECSManaged": "*"
            }
          }
        },
        {
          "Sid": "CloudMapResourceDeletion",
          "Effect": "Allow",
          "Action": [
            "servicediscovery:DeleteService"
          ],
          "Resource": "*",
          "Condition": {
            "Null": {
              "aws:ResourceTag/AmazonECSManaged": "false"
            }
          }
        },
        {
          "Sid": "CloudMapResourceDiscovery",
          "Effect": "Allow",
          "Action": [
            "servicediscovery:DiscoverInstances",
            "servicediscovery:DiscoverInstancesRevision"
          ],
          "Resource": "*"
        },
        {
          "Sid": "CloudMapResourceAttributeManagement",
          "Effect": "Allow",
          "Action": [
            "servicediscovery:UpdateServiceAttributes"
          ],
          "Resource": "*",
          "Condition": {
            "Null": {
              "aws:ResourceTag/AmazonECSManaged": "false"
            }
          }
        },
        {
          "Sid": "ReadOnlyPermissionsForInstanceEventWindows",
          "Effect": "Allow",
          "Action": [
            "ec2:DescribeInstanceEventWindows"
          ],
          "Resource": "*"
        }
      ]
    },
    "VersionId": "v24",
    "IsDefaultVersion": true,
    "CreateDate": "2026-04-22T23:12:09+00:00"
  }
}

Version History (22 recorded)

Raw history

v24updated

1 action added

Apr 23, 2026

4bbd3a1

AmazonECSServiceRolePolicy - Policy Version v23