IAM User With No Group

• Query id: 06933df4-0ea7-461c-b9b5-104d27390e0e
• Query name: IAM User With No Group
• Platform: CloudFormation
• Severity: Low
• Category: Access Control
• CWE: 284
• URL: Github

Description

A IAM user should belong to a group
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
        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
        Tags:
          - QAUser
        UserName: TestUser

Positive test num. 2 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
    emptyGroup:
      Type: AWS::IAM::User
      Properties:
        Groups: []
        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
        Tags:
          - QAUser
        UserName: TestUser

Positive test num. 3 - json file

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

Positive test num. 4 - json file

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

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

AWSTemplateFormatVersion: "2010-09-09"
Description: A sample template
Resources:
  addUserToGroup2:
    Type: AWS::IAM::User
    Properties:
      Groups:
        - QAGroup
      LoginProfile:
          Password: myP@ssW0rd
      Path: "/"
      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
      Tags:
        - QAUser
      UserName: TestUser

Negative test num. 2 - json file

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "A sample template",
  "Resources": {
    "addUserToGroup2": {
      "Type": "AWS::IAM::User",
      "Properties": {
        "Groups": [
          "QAGroup"
        ],
        "LoginProfile": {
          "Password": "myP@ssW0rd"
        },
        "Path": "/",
        "Policies": [
          {
            "PolicyName": "giveaccesstoqueueonly",
            "PolicyDocument": {
              "Version": "2012-10-17",
              "Statement": [
                {
                  "Effect": "Allow",
                  "Action": [
                    "sqs:*"
                  ],
                  "Resource": [
                    "myqueue.Arn"
                  ]
                },
                {
                  "Effect": "Deny",
                  "Action": [
                    "sqs:*"
                  ],
                  "NotResource": [
                    "myqueue.Arn"
                  ]
                }
              ]
            }
          }
        ],
        "Tags": [
          "QAUser"
        ],
        "UserName": "TestUser"
      }
    }
  }
}