IAM user LoginProfile password is in plaintext

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Metadata

Id: 06adef8c-c284-4de7-aad2-af43b07a8ca1

Cloud Provider: AWS

Platform: CloudFormation

Severity: High

Category: Secret Management

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Description

Defining an IAM user’s console password as a plaintext string in an AWS CloudFormation template embeds credentials in source control and template history, increasing the risk of credential leakage and unauthorized account access. For AWS::IAM::User resources, Properties.LoginProfile.Password must not be a string literal. Resources where Properties.LoginProfile.Password is a literal string will be flagged. Use an AWS Secrets Manager dynamic reference to supply the password so it is not stored directly in the template.

Secure configuration example using a Secrets Manager dynamic reference:

MyUser:
  Type: AWS::IAM::User
  Properties:
    UserName: example-user
    LoginProfile:
      Password: "{{resolve:secretsmanager:my-app/iam/user-password:SecretString:password}}"
      PasswordResetRequired: true

Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
    myTopuser:
      Type: AWS::IAM::User
      Properties:
        Path: "/"
        LoginProfile:
         Password:
         - !Ref NoEcho
         PasswordResetRequired: false
        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

{
  "Resources": {
    "myNewuser": {
      "Type": "AWS::IAM::User",
      "Properties": {
        "Path": "/",
        "LoginProfile": {
          "Password": [
            "secretsmanager"
          ],
          "PasswordResetRequired": false
        },
        "Policies": [
          {
            "PolicyName": "giveaccesstoqueueonly",
            "PolicyDocument": {
              "Version": "2012-10-17",
              "Statement": [
                {
                  "Effect": "Allow",
                  "Action": [
                    "sqs:*"
                  ],
                  "Resource": [
                    "myqueue.Arn"
                  ]
                },
                {
                  "Effect": "Deny",
                  "Action": [
                    "sqs:*"
                  ],
                  "NotResource": [
                    "myqueue.Arn"
                  ]
                }
              ]
            }
          }
        ]
      }
    }
  },
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "A sample template"
}


AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
    myNewuser:
      Type: AWS::IAM::User
      Properties:
        Path: "/"
        LoginProfile:
         Password:
         - !Ref secretsmanager
         PasswordResetRequired: false
        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

Non-Compliant Code Examples

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "A sample template",
  "Resources": {
    "myuser": {
      "Type": "AWS::IAM::User",
      "Properties": {
        "LoginProfile": {
          "Password": "myP@ssW0rd",
          "PasswordResetRequired": false
        },
        "Policies": [
          {
            "PolicyName": "giveaccesstoqueueonly",
            "PolicyDocument": {
              "Version": "2012-10-17",
              "Statement": [
                {
                  "Effect": "Allow",
                  "Action": [
                    "sqs:*"
                  ],
                  "Resource": [
                    "myqueue.Arn"
                  ]
                },
                {
                  "Effect": "Deny",
                  "Action": [
                    "sqs:*"
                  ],
                  "NotResource": [
                    "myqueue.Arn"
                  ]
                }
              ]
            }
          }
        ],
        "Path": "/"
      }
    }
  }
}

AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
    myuser:
      Type: AWS::IAM::User
      Properties:
        Path: "/"
        LoginProfile:
         Password: myP@ssW0rd
         PasswordResetRequired: false
        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