Detecting and Marking Non-Compliant VPC Security Groups: SOC2 Compliance

This task focuses on scrutinizing default security groups in AWS VPCs to identify and flag those allowing unauthorized traffic. It serves as a critical measure to pinpoint security groups that deviate from the no-traffic policy, ensuring adherence to stringent network security protocols in VPC environments.

import boto3 from botocore.exceptions import ClientError creds = _get_creds(cred_label)['creds'] access_key = creds['username'] secret_key = creds['password'] def check_default_security_groups(region_name=None): non_compliant_sgs = [] compliant_sgs = [] if region_name: print(f"Checking default security groups in specified region: {region_name}") regions_to_check = [region_name] else: print("Checking default security groups in all AWS regions...") regions_to_check = [region['RegionName'] for region in boto3.client('ec2', aws_access_key_id=access_key,aws_secret_access_key=secret_key,region_name='us-east-1').describe_regions()['Regions']] for region in regions_to_check: try: ec2_client = boto3.client('ec2', aws_access_key_id=access_key,aws_secret_access_key=secret_key,region_name=region) vpcs = ec2_client.describe_vpcs()['Vpcs'] if not vpcs: print(f"No VPCs found in region {region}.") continue for vpc in vpcs: sg_response = ec2_client.describe_security_groups( Filters=[{'Name': 'vpc-id', 'Values': [vpc['VpcId']]}, {'Name': 'group-name', 'Values': ['default']}] ) for sg in sg_response['SecurityGroups']: inbound_rules = sg['IpPermissions'] outbound_rules = sg['IpPermissionsEgress'] if inbound_rules or outbound_rules: non_compliant_sgs.append({ 'Region': region, 'VpcId': vpc['VpcId'], 'SecurityGroupId': sg['GroupId'] }) else: compliant_sgs.append({ 'Region': region, 'VpcId': vpc['VpcId'], 'SecurityGroupId': sg['GroupId'] }) except ClientError as e: print(f"An AWS client error occurred in region {region}: {e}") return non_compliant_sgs, compliant_sgs # Example usage #region_name = None # Use None for all regions, or specify a region like 'us-west-2' non_compliant_security_groups, compliant_security_groups = check_default_security_groups(region_name) if non_compliant_security_groups: print("\nNon-compliant default security groups found:") for sg_info in non_compliant_security_groups: print(f"Region: {sg_info['Region']}, VPC ID: {sg_info['VpcId']}, Security Group ID: {sg_info['SecurityGroupId']} is NON_COMPLIANT") if compliant_security_groups: print("\nCompliant default security groups found:") for sg_info in compliant_security_groups: print(f"Region: {sg_info['Region']}, VPC ID: {sg_info['VpcId']}, Security Group ID: {sg_info['SecurityGroupId']} is COMPLIANT") if not non_compliant_security_groups and not compliant_security_groups: print("\nNo VPCs with default security groups were found.") context.skip_sub_tasks=True

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AWS VPC SOC2 Guideline

1Cn09UVVGIqVK8dHcQafjImplementing No-Traffic Policy in VPC Default Security Groups
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Implementing No-Traffic Policy in VPC Default Security Groups
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This task involves configuring the default security groups within AWS VPCs to strictly enforce a no-traffic policy. It entails systematically updating the security group rules to block all inbound and outbound traffic, ensuring compliance with stringent network security protocols.
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import boto3 from botocore.exceptions import ClientError, BotoCoreError, NoCredentialsError creds = _get_creds(cred_label)['creds'] access_key = creds['username'] secret_key = creds['password'] def remediate_default_sg_of_vpc(region_name, vpc_id): """ Removes all inbound and outbound rules from the default security group of a specified VPC. Parameters: region_name (str): AWS region of the VPC. vpc_id (str): ID of the VPC whose default security group needs to be remediated. Returns: None """ if not region_name or not vpc_id: print("Error: 'region_name' and 'vpc_id' must be provided.") return try: ec2_client = boto3.client('ec2', aws_access_key_id=access_key,aws_secret_access_key=secret_key,region_name=region_name) sg_response = ec2_client.describe_security_groups( Filters=[{'Name': 'vpc-id', 'Values': [vpc_id]}, {'Name': 'group-name', 'Values': ['default']}] ) #print(sg_response) # for debugging if sg_response['SecurityGroups']: sg_id = sg_response['SecurityGroups'][0]['GroupId'] #print(sg_id) # for debugging # Remove all inbound and outbound rules try: # Retrieve existing rules current_sg = ec2_client.describe_security_groups(GroupIds=[sg_id])['SecurityGroups'][0] inbound_rules = current_sg.get('IpPermissions', []) outbound_rules = current_sg.get('IpPermissionsEgress', []) # Remove inbound rules if inbound_rules: ec2_client.revoke_security_group_ingress(GroupId=sg_id, IpPermissions=inbound_rules) print(f"Removed all inbound rules from default security group {sg_id} in VPC {vpc_id}.") # Remove outbound rules if outbound_rules: ec2_client.revoke_security_group_egress(GroupId=sg_id, IpPermissions=outbound_rules) print(f"Removed all outbound rules from default security group {sg_id} in VPC {vpc_id}.") # Verification step updated_sg = ec2_client.describe_security_groups(GroupIds=[sg_id])['SecurityGroups'][0] if not updated_sg.get('IpPermissions') and not updated_sg.get('IpPermissionsEgress'): print(f"Successfully removed all rules from security group {sg_id}.") else: print(f"Rules may not have been completely removed from security group {sg_id}.") except ClientError as e: print(f"Error modifying security group {sg_id}: {e}") else: print(f"No default security group found for VPC {vpc_id}.") except NoCredentialsError: print("Error: No AWS credentials found. Please configure your credentials.") except BotoCoreError as e: print(f"BotoCore Error: {e}") except ClientError as e: print(f"Client Error: {e}") except Exception as e: print(f"An unexpected error occurred: {e}") # Example usage #region_name = 'us-west-2' # Specify the AWS region #vpc_id = 'vpc-0e42a95f21ed25d5c' # Replace with your VPC ID remediate_default_sg_of_vpc(region_name, vpc_id)
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AWS VPC SOC2 Guideline Remediation
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Detecting and Marking Non-Compliant VPC Security Groups: SOC2 Compliance

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