# Source: https://docs.datadoghq.com/security/code_security/iac_security/iac_rules/terraform/aws/role_with_privilege_escalation_by_actions_iam_passrole_and_cloudformation_createstack.md

---
title: >-
  Role with privilege escalation by actions 'cloudformation:CreateStack' and
  'iam:PassRole'
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Infrastructure as Code (IaC)
  Security > IaC Security Rules > Role with privilege escalation by actions
  'cloudformation:CreateStack' and 'iam:PassRole'
---

# Role with privilege escalation by actions 'cloudformation:CreateStack' and 'iam:PassRole'

{% callout %}
# Important note for users on the following Datadog sites: app.ddog-gov.com

{% alert level="danger" %}
This product is not supported for your selected [Datadog site](https://docs.datadoghq.com/getting_started/site). ().
{% /alert %}

{% /callout %}

## Metadata{% #metadata %}

**Id:** `be2aa235-bd93-4b68-978a-1cc65d49082f`

**Cloud Provider:** AWS

**Platform:** Terraform

**Severity:** Medium

**Category:** Access Control

#### Learn More{% #learn-more %}

- [Provider Reference](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy#policy)

### Description{% #description %}

Granting an IAM role permissions for both `cloudformation:CreateStack` and `iam:PassRole` actions with the resource set to `"*"` allows users with this role to launch CloudFormation stacks that assume any IAM role in the account, leading to privilege escalation. This vulnerability means an attacker could potentially create resources with elevated privileges or gain full administrative access to the AWS environment. To mitigate this, avoid assigning overly permissive policies, and instead restrict `iam:PassRole` and `cloudformation:CreateStack` to only trusted roles and explicitly specify the allowed resource ARNs in the policy's `Resource` attribute.

## Compliant Code Examples{% #compliant-code-examples %}

```terraform
resource "aws_iam_user" "cosmic2" {
  name = "cosmic2"
}

resource "aws_iam_user_policy" "inline_policy_run_instances2" {
  name = "inline_policy_run_instances"
  user = aws_iam_user.cosmic2.name

  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = [
          "ec2:Describe*",
        ]
        Effect   = "Allow"
        Resource = "*"
      },
    ]
  })
}
```

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```terraform
resource "aws_iam_role" "cosmic" {
  name = "cosmic"
}

resource "aws_iam_role_policy" "test_inline_policy" {
  name = "test_inline_policy"
  role = aws_iam_role.cosmic.name

  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = [
          "cloudformation:CreateStack",
        ]
        Effect   = "Allow"
        Resource = "*"
      },
    ]
  })
}


resource "aws_iam_policy_attachment" "test-attach" {
  name       = "test-attachment"
  roles      = [aws_iam_role.cosmic.name]
  policy_arn = aws_iam_policy.policy.arn
}


resource "aws_iam_policy" "policy" {
  name        = "test-policy"
  description = "A test policy"

  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = [
          "iam:PassRole",
        ]
        Effect   = "Allow"
        Resource = "*"
      },
    ]
  })
}
```