AWSCloud9ServiceRolePolicy

Last Modified

Sep 4, 2026

September 4, 2026 at 12:03 AM UTC

Version

Total Versions

Created

Sep 3, 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 launch resources that run as a more privileged role
Grants the actions of 2 documented escalation paths, but only on named resources or under a condition. Review that scope before trusting it.
- cloudformation-001iam:PassRole + cloudformation:CreateStackscoped
  - iam:PassRole: condition iam:PassedToService, on arn:aws:iam::*:role/service-role/AWSCloud9SSMAccessRole
- ec2-001iam:PassRole + ec2:RunInstancesscoped
  - iam:PassRole: condition iam:PassedToService, on arn:aws:iam::*:role/service-role/AWSCloud9SSMAccessRole
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.

Policy Document

View on GitHub

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116{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Action": [
            "ec2:RunInstances",
            "ec2:CreateSecurityGroup",
            "ec2:DescribeVpcs",
            "ec2:DescribeSubnets",
            "ec2:DescribeSecurityGroups",
            "ec2:DescribeInstances",
            "ec2:DescribeInstanceStatus",
            "cloudformation:CreateStack",
            "cloudformation:DescribeStacks",
            "cloudformation:DescribeStackEvents",
            "cloudformation:DescribeStackResources",
            "ec2:TerminateInstances",
            "ec2:DeleteSecurityGroup",
            "ec2:AuthorizeSecurityGroupIngress"
          ],
          "Resource": "*"
        },
        {
          "Effect": "Allow",
          "Action": [
            "cloudformation:DeleteStack"
          ],
          "Resource": "arn:aws:cloudformation:*:*:stack/aws-cloud9-*"
        },
        {
          "Effect": "Allow",
          "Action": [
            "ec2:CreateTags"
          ],
          "Resource": [
            "arn:aws:ec2:*:*:instance/*",
            "arn:aws:ec2:*:*:security-group/*"
          ],
          "Condition": {
            "StringLike": {
              "aws:RequestTag/Name": "aws-cloud9-*"
            }
          }
        },
        {
          "Effect": "Allow",
          "Action": [
            "ec2:StartInstances",
            "ec2:StopInstances"
          ],
          "Resource": "*",
          "Condition": {
            "StringLike": {
              "ec2:ResourceTag/aws:cloudformation:stack-name": "aws-cloud9-*"
            }
          }
        },
        {
          "Effect": "Allow",
          "Action": [
            "ec2:StartInstances",
            "ec2:StopInstances"
          ],
          "Resource": [
            "arn:aws:license-manager:*:*:license-configuration:*"
          ]
        },
        {
          "Effect": "Allow",
          "Action": [
            "iam:ListInstanceProfiles",
            "iam:GetInstanceProfile"
          ],
          "Resource": [
            "arn:aws:iam::*:instance-profile/cloud9/*"
          ]
        },
        {
          "Effect": "Allow",
          "Action": [
            "iam:PassRole"
          ],
          "Resource": [
            "arn:aws:iam::*:role/service-role/AWSCloud9SSMAccessRole"
          ],
          "Condition": {
            "StringLike": {
              "iam:PassedToService": "ec2.amazonaws.com"
            }
          }
        },
        {
          "Sid": "CloudFormationTagOnCreate",
          "Effect": "Allow",
          "Action": [
            "cloudformation:TagResource"
          ],
          "Resource": "*",
          "Condition": {
            "StringEquals": {
              "cloudformation:CreateAction": [
                "CreateStack"
              ]
            }
          }
        }
      ]
    },
    "VersionId": "v9",
    "IsDefaultVersion": true,
    "CreateDate": "2026-09-03T23:17:07+00:00"
  }
}

Version History (17 recorded)

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v9updated

1 action added

Sep 4, 2026

a755968

AWSCloud9ServiceRolePolicy - Policy Version v8