API Gateway method does not contains an API key

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Metadata

Id: 671211c5-5d2a-4e97-8867-30fc28b02216

Cloud Provider: AWS

Platform: Terraform

Severity: Medium

Category: Access Control

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Description

When defining an aws_api_gateway_method resource in Terraform, it is critical to require an API key on method requests by setting the attribute api_key_required = true. If this option is set to false or omitted (as shown below), unauthorized clients can invoke the API method without providing an API key, exposing the endpoint to potential abuse and unauthorized access.

resource "aws_api_gateway_method" "insecure_example" {
  rest_api_id      = aws_api_gateway_rest_api.MyDemoAPI.id
  resource_id      = aws_api_gateway_resource.MyDemoResource.id
  http_method      = "GET"
  authorization    = "NONE"
  api_key_required = false
}

Failing to enforce API key requirements can lead to security risks such as credential-less access to sensitive endpoints, excessive traffic, and increased risk of denial-of-service attacks.

Compliant Code Examples

resource "aws_api_gateway_method" "negative1" {
  rest_api_id       = aws_api_gateway_rest_api.MyDemoAPI.id
  resource_id       = aws_api_gateway_resource.MyDemoResource.id
  http_method       = "GET"
  authorization     = "NONE"
  api_key_required  = true
}

Non-Compliant Code Examples

resource "aws_api_gateway_method" "positive1" {
  rest_api_id       = aws_api_gateway_rest_api.MyDemoAPI.id
  resource_id       = aws_api_gateway_resource.MyDemoResource.id
  http_method       = "GET"
  authorization     = "NONE"
}

resource "aws_api_gateway_method" "positive2" {
  rest_api_id       = aws_api_gateway_rest_api.MyDemoAPI.id
  resource_id       = aws_api_gateway_resource.MyDemoResource.id
  http_method       = "GET"
  authorization     = "NONE"
  api_key_required  = false
}