IAM password without minimum length

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Metadata

Id: cloudformation-aws-iam-password-without-minimum-length

Provider: AWS

Platform: CloudFormation

Severity: Low

Category: Best Practices

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Description

IAM user console passwords defined in AWS CloudFormation should be strong to reduce the risk of account compromise through brute force, credential stuffing, or simple credential reuse. For AWS::IAM::User resources, Properties.LoginProfile.Password must be a string with a minimum length of 14 characters. Passwords shorter than 14 characters will be flagged unless they reference a secret via an AWS Secrets Manager dynamic reference. Avoid embedding plaintext passwords in templates. Instead, reference secrets stored in AWS Secrets Manager or SSM Parameter Store, or rely on IAM-managed workflows and password policies.

Secure example with a sufficiently long password (or a secret reference) in CloudFormation:

MyUser:
  Type: AWS::IAM::User
  Properties:
    UserName: example-user
    LoginProfile:
      Password: "S3cureP@ssw0rd2025"

Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
  myuser:
    Type: AWS::IAM::User
    Properties:
      Path: "/"
      LoginProfile:
        Password: myP@ssW0rd123asw
      Policies:
      - PolicyName: giveaccesstoqueueonly
        PolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Effect: Allow
            Action:
            - sqs:*
            Resource:
            - !GetAtt myqueue.Arn
          - Effect: Deny
            Action:
            - sqs:*
            NotResource:
            - !GetAtt myqueue.Arn
      - PolicyName: giveaccesstotopiconly
        PolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Effect: Allow
            Action:
            - sns:*
            Resource:
            - !Ref mytopic
          - Effect: Deny
            Action:
            - sns:*
            NotResource:
            - !Ref mytopic

Non-Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
  myuser:
    Type: AWS::IAM::User
    Properties:
      Path: "/"
      LoginProfile:
        Password: myP@ssW0rd
      Policies:
      - PolicyName: giveaccesstoqueueonly
        PolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Effect: Allow
            Action:
            - sqs:*
            Resource:
            - !GetAtt myqueue.Arn
          - Effect: Deny
            Action:
            - sqs:*
            NotResource:
            - !GetAtt myqueue.Arn
      - PolicyName: giveaccesstotopiconly
        PolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Effect: Allow
            Action:
            - sns:*
            Resource:
            - !Ref mytopic
          - Effect: Deny
            Action:
            - sns:*
            NotResource:
            - !Ref mytopic