WAF V2 Rule Groups Should Not Be Empty

Using Console

Using CLI

To remediate the misconfiguration of having empty WAF V2 Rule Groups in AWS CloudWatch using AWS CLI, you can follow these steps:

Identify the Empty WAF V2 Rule Groups: First, you need to identify the empty WAF V2 Rule Groups in your AWS account. You can do this by running the following AWS CLI command:
```
aws wafv2 list-rule-groups --scope CLOUDFRONT(or REGIONAL) --query "RuleGroups[?RuleGroupArn == null].Name"
```
This command will list the names of all the empty WAF V2 Rule Groups in your account.
Update the Empty Rule Groups: To update the empty WAF V2 Rule Groups, you can either add rules to them or delete them based on your requirements.
- To add rules to a specific empty WAF V2 Rule Group, you can use the following AWS CLI command:
  aws wafv2 update-rule-group --scope CLOUDFRONT(or REGIONAL) --name <RuleGroupName> --rules-action ALLOW|BLOCK --rules file://rules.json
  Replace <RuleGroupName> with the name of the empty WAF V2 Rule Group and provide the necessary rules in the rules.json file.
- To delete a specific empty WAF V2 Rule Group, you can use the following AWS CLI command:
  aws wafv2 delete-rule-group --scope CLOUDFRONT(or REGIONAL) --name <RuleGroupName>
  Replace <RuleGroupName> with the name of the empty WAF V2 Rule Group that you want to delete.
Verify the Changes: After updating or deleting the empty WAF V2 Rule Groups, you can verify the changes by listing all the WAF V2 Rule Groups in your account using the following AWS CLI command:
```
aws wafv2 list-rule-groups --scope CLOUDFRONT(or REGIONAL) --query "RuleGroups[].Name"
```
This command will list all the WAF V2 Rule Groups in your account.

By following these steps, you can remediate the misconfiguration of having empty WAF V2 Rule Groups in AWS CloudWatch using AWS CLI.

Using Python

To remediate the misconfiguration of having empty WAF V2 Rule Groups in AWS CloudWatch using Python, you can follow these steps:

Install the Boto3 library:

pip install boto3

Use the following Python script to check for and remediate empty WAF V2 Rule Groups in AWS CloudWatch:

import boto3

def remediate_empty_rule_groups():
    # Initialize the AWS CloudWatch client
    client = boto3.client('wafv2')

    # Get all the available rule groups
    response = client.list_rule_groups(Scope='CLOUDFRONT(or REGIONAL)')

    for rule_group in response['RuleGroups']:
        rule_group_id = rule_group['Id']
        
        # Get the rules in each rule group
        rules_response = client.get_rule_group(RuleGroupId=rule_group_id)
        
        # Check if the rule group is empty
        if not rules_response['RuleGroup']['AvailableRules']:
            # Remediate by adding a sample rule
            sample_rule = {
                'Name': 'SampleRule',
                'Priority': 1,
                'Statement': {
                    'ByteMatchStatement': {
                        'SearchString': 'sample',
                        'FieldToMatch': {
                            'UriPath': {}
                        }
                    }
                },
                'Action': {
                    'Block': {}
                },
                'VisibilityConfig': {
                    'SampledRequestsEnabled': True,
                    'CloudWatchMetricsEnabled': True,
                    'MetricName': 'SampleRuleMetric'
                }
            }
            
            # Add the sample rule to the rule group
            client.put_managed_rule_group(
                RuleGroupName=rule_group_id,
                Updates=[
                    {
                        'Action': 'INSERT',
                        'ManagedRuleGroupStatement': {
                            'VendorName': 'AWS',
                            'Name': 'AWSManagedRulesCommonRuleSet',
                            'ExcludedRules': []
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleGroupReferenceStatement': {
                            'ARN': 'arn:aws:wafv2:us-west-2:123456789012:regional/managedrulegroup/AWSManagedRulesCommonRuleSet',
                            'ExcludedRules': []
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleStatement': {
                            'ManagedRuleGroupStatement': {
                                'VendorName': 'AWS',
                                'Name': 'AWSManagedRulesKnownBadInputsRuleSet',
                                'ExcludedRules': []
                            }
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleStatement': {
                            'ManagedRuleGroupStatement': {
                                'VendorName': 'AWS',
                                'Name': 'AWSManagedRulesPHPRuleSet',
                                'ExcludedRules': []
                            }
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleStatement': {
                            'ManagedRuleGroupStatement': {
                                'VendorName': 'AWS',
                                'Name': 'AWSManagedRulesSQLiRuleSet',
                                'ExcludedRules': []
                            }
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleStatement': {
                            'ManagedRuleGroupStatement': {
                                'VendorName': 'AWS',
                                'Name': 'AWSManagedRulesLinuxRuleSet',
                                'ExcludedRules': []
                            }
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleStatement': {
                            'ManagedRuleGroupStatement': {
                                'VendorName': 'AWS',
                                'Name': 'AWSManagedRulesAdminProtectionRuleSet',
                                'ExcludedRules': []
                            }
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleStatement': {
                            'ManagedRuleGroupStatement': {
                                'VendorName': 'AWS',
                                'Name': 'AWSManagedRulesBotControlRuleSet',
                                'ExcludedRules': []
                            }
                        }
                    },
                    {
                        'Action': 'INSERT',
                        'RuleStatement': {
                            'RuleGroupReferenceStatement': {
                                'ARN': rule_group_id,
                                'ExcludedRules': []
                            }
                        }
                    }
                ]
            )
            print(f"Remediated empty rule group: {rule_group_id} by adding a sample rule")
        else:
            print(f"Rule group: {rule_group_id} is not empty")

if __name__ == '__main__':
    remediate_empty_rule_groups()

Run this Python script to check for empty WAF V2 Rule Groups in AWS CloudWatch and remediate them by adding a sample rule to each empty rule group.

This script will add a sample rule to each empty WAF V2 Rule Group in AWS CloudWatch. You can customize the sample rule based on your requirements.

AWS Introduction

AWS Pricing

AWS Threats

AWS Misconfigurations

WAF V2 Rule Groups Should Not Be Empty

More Info:

Risk Level

Address

Compliance Standards

Triage and Remediation

Remediation

AWS Introduction

AWS Pricing

AWS Threats

AWS Misconfigurations

​More Info:

​Risk Level

​Address

​Compliance Standards

​Triage and Remediation