EFS with vulnerable policy

이 제품은 선택한 Datadog 사이트에서 지원되지 않습니다. ().
이 페이지는 아직 한국어로 제공되지 않습니다. 번역 작업 중입니다.
현재 번역 프로젝트에 대한 질문이나 피드백이 있으신 경우 언제든지 연락주시기 바랍니다.

Metadata

Id: fae52418-bb8b-4ac2-b287-0b9082d6a3fd

Cloud Provider: AWS

Platform: Terraform

Severity: Medium

Category: Access Control

Learn More

Description

AWS EFS file system policies should avoid the use of wildcards (*) in the Action and Principal fields, as shown below, because this grants broad permissions to all users and all actions:

"Principal": { "AWS": "*" },
"Action": ["elasticfilesystem:*"]

Such overly permissive policies can allow any AWS account to perform any action on the EFS resource, leading to potential unauthorized data access, deletion, or modification. To mitigate this risk, restrict the Principal to specific IAM identities and limit Action to only what is necessary. For example:

"Principal": { "AWS": "arn:aws:iam::111122223333:user/Carlos" },
"Action": ["elasticfilesystem:ClientMount", "elasticfilesystem:ClientWrite"]

Compliant Code Examples

resource "aws_efs_file_system" "fs" {
  creation_token = "my-product"
}

resource "aws_efs_file_system_policy" "policy" {
  file_system_id = aws_efs_file_system.fs.id

  policy = <<POLICY
{
    "Version": "2012-10-17",
    "Id": "ExamplePolicy01",
    "Statement": [
        {
            "Sid": "ExampleStatement01",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::111122223333:user/Carlos"
            }
            "Resource": "aws_efs_file_system.test.arn",
            "Action": [
                "elasticfilesystem:ClientMount",
                "elasticfilesystem:ClientWrite"
            ],
            "Condition": {
                "Bool": {
                    "aws:SecureTransport": "true"
                }
            }
        }
    ]
}
POLICY
}

Non-Compliant Code Examples

provider "aws" {
  region = "us-east-1"
}

resource "aws_efs_file_system" "not_secure" {
  creation_token = "efs-not-secure"

  tags = {
    Name = "NotSecure"
  }
}

resource "aws_efs_file_system_policy" "not_secure_policy" {
  file_system_id = aws_efs_file_system.not_secure.id

  policy = <<POLICY
{
    "Version": "2012-10-17",
    "Id": "ExamplePolicy01",
    "Statement": [
        {
            "Sid": "ExampleStatement01",
            "Effect": "Allow",
            "Principal": {
                "AWS": "*"
            },
            "Action": [
                "elasticfilesystem:*"
            ]
        }
    ]
}
POLICY
}