EBS Volume Not Attached To Instances

• Query id: 1819ac03-542b-4026-976b-f37addd59f3b
• Query name: EBS Volume Not Attached To Instances
• Platform: CloudFormation
• Severity: Medium
• Category: Availability
• URL: Github

Description

EBS Volumes that are unattached to instances may contain sensitive data
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file

AWSTemplateFormatVersion: 2010-09-09
Resources:
    NewVolume:
        Type: AWS::EC2::Volume
        Properties:
            Size: 100
            AvailabilityZone: us-west-1

Positive test num. 2 - json file

{
  "AWSTemplateFormatVersion": "2010-09-09T00:00:00Z",
  "Resources": {
    "NewVolume": {
      "Type": "AWS::EC2::Volume",
      "Properties": {
        "AvailabilityZone": "us-west-1",
        "Size": 100
      }
    }
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

AWSTemplateFormatVersion: 2010-09-09
Resources:
    NewVolume:
        Type: AWS::EC2::Volume
        Properties:
            Size: 100
            AvailabilityZone: us-west-1
    MountPoint:
        Type: AWS::EC2::VolumeAttachment
        Properties:
            InstanceId: !Ref Ec2Instance
            VolumeId: !Ref NewVolume
            Device: /dev/sdh

Negative test num. 2 - json file

{
  "AWSTemplateFormatVersion": "2010-09-09T00:00:00Z",
  "Resources": {
    "NewVolume": {
      "Type": "AWS::EC2::Volume",
      "Properties": {
        "Size": 100,
        "AvailabilityZone": "us-west-1"
      }
    },
    "MountPoint": {
      "Type": "AWS::EC2::VolumeAttachment",
      "Properties": {
        "VolumeId": "NewVolume",
        "Device": "/dev/sdh",
        "InstanceId": "Ec2Instance"
      }
    }
  }
}