IAM User Has Too Many Access Keys

• Query id: 48677914-6fdf-40ec-80c4-2b0e94079f54
• Query name: IAM User Has Too Many Access Keys
• Platform: CloudFormation
• Severity: Medium
• Category: Insecure Configurations
• CWE: 284
• URL: Github

Description

Any IAM User should not have more than one access key since it increases the risk of unauthorized access and compromise credentials
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
    myuser:
      Type: AWS::IAM::User
      Properties:
        Path: "/"
        LoginProfile:
          Password: myP@ssW0rd
    firstKey:
      Type: AWS::IAM::AccessKey
      Properties:
        UserName: !Ref myuser
    secondKey:
      Type: AWS::IAM::AccessKey
      Properties:
        UserName: !Ref myuser

Positive test num. 2 - json file

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "A sample template",
  "Resources": {
    "secondKey": {
      "Type": "AWS::IAM::AccessKey",
      "Properties": {
        "UserName": "myuser"
      }
    },
    "myuser": {
      "Type": "AWS::IAM::User",
      "Properties": {
        "LoginProfile": {
          "Password": "myP@ssW0rd"
        },
        "Path": "/"
      }
    },
    "firstKey": {
      "Type": "AWS::IAM::AccessKey",
      "Properties": {
        "UserName": "myuser"
      }
    }
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

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

Negative test num. 2 - json file

{
  "Resources": {
    "myuser": {
      "Type": "AWS::IAM::User",
      "Properties": {
        "Path": "/",
        "LoginProfile": {
          "Password": "myP@ssW0rd"
        }
      }
    },
    "firstKey": {
      "Type": "AWS::IAM::AccessKey",
      "Properties": {
        "UserName": {
          "Ref": "myuser"
        }
      }
    }
  },
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "A sample template"
}