fix(vpc_endpoint_services_allowed_principals_trust_boundaries): Principal (#2991)

prowler/providers/aws/services/vpc/vpc_endpoint_services_allowed_principals_trust_boundaries/vpc_endpoint_services_allowed_principals_trust_boundaries.py

@@ -1,3 +1,5 @@
+from re import compile
+
 from prowler.lib.check.models import Check, Check_Report_AWS
 from prowler.providers.aws.services.vpc.vpc_client import vpc_client
 
@@ -21,7 +23,14 @@ class vpc_endpoint_services_allowed_principals_trust_boundaries(Check):
                 findings.append(report)
             else:
                 for principal in service.allowed_principals:
-                    account_id = principal.split(":")[4]
+                    # Account ID can be an ARN or just a 12-digit string
+                    pattern = compile(r"^[0-9]{12}$")
+                    match = pattern.match(principal)
+                    if not match:
+                        account_id = principal.split(":")[4]
+                    else:
+                        account_id = match.string
+
                     report = Check_Report_AWS(self.metadata())
                     report.region = service.region
                     if (

tests/providers/aws/services/vpc/vpc_endpoint_services_allowed_principals_trust_boundaries/vpc_endpoint_services_allowed_principals_trust_boundaries_test.py

@@ -1,85 +1,27 @@
 from unittest import mock
 
-import botocore
-from boto3 import client, session
-from mock import patch
+from boto3 import client
 from moto import mock_ec2, mock_elbv2
 
-from prowler.providers.aws.lib.audit_info.models import AWS_Audit_Info
-from prowler.providers.common.models import Audit_Metadata
+from tests.providers.aws.audit_info_utils import (
+    AWS_REGION_US_EAST_1,
+    set_mocked_aws_audit_info,
+)
 
-AWS_REGION = "us-east-1"
 AWS_ACCOUNT_NUMBER = "123456789012"
-
-# Mocking VPC Calls
-make_api_call = botocore.client.BaseClient._make_api_call
+AWS_ACCOUNT_ARN = f"arn:aws:iam::{AWS_ACCOUNT_NUMBER}:root"
+AWS_ACCOUNT_NUMBER_2 = "111122223333"
+AWS_ACCOUNT_ARN_2 = f"arn:aws:iam::{AWS_ACCOUNT_NUMBER_2}:root"
 
 
-def mock_make_api_call(self, operation_name, kwarg):
-    """
-    We have to mock every AWS API call using Boto3
-
-    Rationale -> https://github.com/boto/botocore/blob/develop/botocore/client.py#L810:L816
-    """
-    if operation_name == "DescribeVpcEndpointServices":
-        return {
-            "ServiceDetails": [
-                {
-                    "ServiceId": "vpce-svc-4b919ac5",
-                    "ServiceName": "string",
-                    "Owner": AWS_ACCOUNT_NUMBER,
-                    "StageName": "test-stage",
-                }
-            ]
-        }
-    return make_api_call(self, operation_name, kwarg)
-
-
-@patch("botocore.client.BaseClient._make_api_call", new=mock_make_api_call)
 class Test_vpc_endpoint_services_allowed_principals_trust_boundaries:
-    def set_mocked_audit_info(self):
-        audit_info = AWS_Audit_Info(
-            session_config=None,
-            original_session=None,
-            audit_session=session.Session(
-                profile_name=None,
-                botocore_session=None,
-            ),
-            audited_account=AWS_ACCOUNT_NUMBER,
-            audited_account_arn=f"arn:aws:iam::{AWS_ACCOUNT_NUMBER}:root",
-            audited_user_id=None,
-            audited_partition="aws",
-            audited_identity_arn=None,
-            profile=None,
-            profile_region=None,
-            credentials=None,
-            assumed_role_info=None,
-            audited_regions=[AWS_REGION],
-            organizations_metadata=None,
-            audit_resources=None,
-            mfa_enabled=False,
-            audit_metadata=Audit_Metadata(
-                services_scanned=0,
-                expected_checks=[],
-                completed_checks=0,
-                audit_progress=0,
-            ),
-        )
-
-        return audit_info
-
     @mock_ec2
-    def test_vpc_no_endpoint_services(self):
-        # VPC Endpoint Services
-        ec2_client = client("ec2", region_name=AWS_REGION)
-        endpoint_id = ec2_client.describe_vpc_endpoint_services()["ServiceDetails"][0][
-            "ServiceId"
-        ]
-        endpoint_arn = f"arn:aws:ec2:{AWS_REGION}:{AWS_ACCOUNT_NUMBER}:vpc-endpoint-service/{endpoint_id}"
-
+    def test_no_vpc_endpoint_services(self):
         from prowler.providers.aws.services.vpc.vpc_service import VPC
 
-        current_audit_info = self.set_mocked_audit_info()
+        current_audit_info = set_mocked_aws_audit_info(
+            audited_regions=[AWS_REGION_US_EAST_1]
+        )
         # Set config variable
         current_audit_info.audit_config = {"trusted_account_ids": []}
 
@@ -99,23 +41,14 @@ class Test_vpc_endpoint_services_allowed_principals_trust_boundaries:
                 check = vpc_endpoint_services_allowed_principals_trust_boundaries()
                 result = check.execute()
 
-                assert len(result) == 1  # one endpoint per region
-                assert result[0].status == "PASS"
-                assert (
-                    result[0].status_extended
-                    == f"VPC Endpoint Service {endpoint_id} has no allowed principals."
-                )
-                assert result[0].resource_id == endpoint_id
-                assert result[0].resource_arn == endpoint_arn
-                assert result[0].resource_tags is None
-                assert result[0].region == AWS_REGION
+                assert len(result) == 0
 
     @mock_ec2
     @mock_elbv2
     def test_vpc_endpoint_service_without_allowed_principals(self):
         # Create VPC Mocked Resources
-        ec2_client = client("ec2", region_name=AWS_REGION)
-        elbv2_client = client("elbv2", region_name=AWS_REGION)
+        ec2_client = client("ec2", region_name=AWS_REGION_US_EAST_1)
+        elbv2_client = client("elbv2", region_name=AWS_REGION_US_EAST_1)
 
         vpc = ec2_client.create_vpc(
             CidrBlock="172.28.7.0/24", InstanceTenancy="default"
@@ -123,7 +56,7 @@ class Test_vpc_endpoint_services_allowed_principals_trust_boundaries:
         subnet = ec2_client.create_subnet(
             VpcId=vpc["Vpc"]["VpcId"],
             CidrBlock="172.28.7.192/26",
-            AvailabilityZone=f"{AWS_REGION}a",
+            AvailabilityZone=f"{AWS_REGION_US_EAST_1}a",
         )
         lb_name = "lb_vpce-test"
         lb_arn = elbv2_client.create_load_balancer(
@@ -133,18 +66,17 @@ class Test_vpc_endpoint_services_allowed_principals_trust_boundaries:
             Type="network",
         )["LoadBalancers"][0]["LoadBalancerArn"]
 
-        _ = ec2_client.create_vpc_endpoint_service_configuration(
+        endpoint_id = ec2_client.create_vpc_endpoint_service_configuration(
             NetworkLoadBalancerArns=[lb_arn]
-        )
+        )["ServiceConfiguration"]["ServiceId"]
 
-        endpoint_id = ec2_client.describe_vpc_endpoint_services()["ServiceDetails"][0][
-            "ServiceId"
-        ]
-        endpoint_arn = f"arn:aws:ec2:{AWS_REGION}:{AWS_ACCOUNT_NUMBER}:vpc-endpoint-service/{endpoint_id}"
+        endpoint_arn = f"arn:aws:ec2:{AWS_REGION_US_EAST_1}:{AWS_ACCOUNT_NUMBER}:vpc-endpoint-service/{endpoint_id}"
 
         from prowler.providers.aws.services.vpc.vpc_service import VPC
 
-        current_audit_info = self.set_mocked_audit_info()
+        current_audit_info = set_mocked_aws_audit_info(
+            audited_regions=[AWS_REGION_US_EAST_1]
+        )
         # Set config variable
         current_audit_info.audit_config = {"trusted_account_ids": []}
 
@@ -168,9 +100,289 @@ class Test_vpc_endpoint_services_allowed_principals_trust_boundaries:
                 assert result[0].status == "PASS"
                 assert (
                     result[0].status_extended
-                    == f"VPC Endpoint Service {ec2_client.describe_vpc_endpoint_services()['ServiceDetails'][0]['ServiceId']} has no allowed principals."
+                    == f"VPC Endpoint Service {endpoint_id} has no allowed principals."
                 )
                 assert result[0].resource_id == endpoint_id
                 assert result[0].resource_arn == endpoint_arn
-                assert result[0].resource_tags is None
-                assert result[0].region == AWS_REGION
+                assert result[0].resource_tags == []
+                assert result[0].region == AWS_REGION_US_EAST_1
+
+    @mock_ec2
+    @mock_elbv2
+    def test_vpc_endpoint_service_with_allowed_principal_account_arn(self):
+        # Create VPC Mocked Resources
+        ec2_client = client("ec2", region_name=AWS_REGION_US_EAST_1)
+        elbv2_client = client("elbv2", region_name=AWS_REGION_US_EAST_1)
+
+        vpc = ec2_client.create_vpc(
+            CidrBlock="172.28.7.0/24", InstanceTenancy="default"
+        )
+        subnet = ec2_client.create_subnet(
+            VpcId=vpc["Vpc"]["VpcId"],
+            CidrBlock="172.28.7.192/26",
+            AvailabilityZone=f"{AWS_REGION_US_EAST_1}a",
+        )
+        lb_name = "lb_vpce-test"
+        lb_arn = elbv2_client.create_load_balancer(
+            Name=lb_name,
+            Subnets=[subnet["Subnet"]["SubnetId"]],
+            Scheme="internal",
+            Type="network",
+        )["LoadBalancers"][0]["LoadBalancerArn"]
+
+        endpoint_id = ec2_client.create_vpc_endpoint_service_configuration(
+            NetworkLoadBalancerArns=[lb_arn]
+        )["ServiceConfiguration"]["ServiceId"]
+
+        # Add allowed principals
+        ec2_client.modify_vpc_endpoint_service_permissions(
+            ServiceId=endpoint_id, AddAllowedPrincipals=[AWS_ACCOUNT_ARN]
+        )
+
+        endpoint_arn = f"arn:aws:ec2:{AWS_REGION_US_EAST_1}:{AWS_ACCOUNT_NUMBER}:vpc-endpoint-service/{endpoint_id}"
+
+        from prowler.providers.aws.services.vpc.vpc_service import VPC
+
+        current_audit_info = set_mocked_aws_audit_info(
+            audited_regions=[AWS_REGION_US_EAST_1]
+        )
+        # Set config variable
+        current_audit_info.audit_config = {"trusted_account_ids": []}
+
+        with mock.patch(
+            "prowler.providers.aws.lib.audit_info.audit_info.current_audit_info",
+            new=current_audit_info,
+        ):
+            with mock.patch(
+                "prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_client",
+                new=VPC(current_audit_info),
+            ):
+                # Test Check
+                from prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries import (
+                    vpc_endpoint_services_allowed_principals_trust_boundaries,
+                )
+
+                check = vpc_endpoint_services_allowed_principals_trust_boundaries()
+                result = check.execute()
+
+                assert len(result) == 1
+                assert result[0].status == "PASS"
+                assert (
+                    result[0].status_extended
+                    == f"Found trusted account {AWS_ACCOUNT_NUMBER} in VPC Endpoint Service {endpoint_id}."
+                )
+                assert result[0].resource_id == endpoint_id
+                assert result[0].resource_arn == endpoint_arn
+                assert result[0].resource_tags == []
+                assert result[0].region == AWS_REGION_US_EAST_1
+
+    @mock_ec2
+    @mock_elbv2
+    def test_vpc_endpoint_service_with_allowed_principal_account_number(self):
+        # Create VPC Mocked Resources
+        ec2_client = client("ec2", region_name=AWS_REGION_US_EAST_1)
+        elbv2_client = client("elbv2", region_name=AWS_REGION_US_EAST_1)
+
+        vpc = ec2_client.create_vpc(
+            CidrBlock="172.28.7.0/24", InstanceTenancy="default"
+        )
+        subnet = ec2_client.create_subnet(
+            VpcId=vpc["Vpc"]["VpcId"],
+            CidrBlock="172.28.7.192/26",
+            AvailabilityZone=f"{AWS_REGION_US_EAST_1}a",
+        )
+        lb_name = "lb_vpce-test"
+        lb_arn = elbv2_client.create_load_balancer(
+            Name=lb_name,
+            Subnets=[subnet["Subnet"]["SubnetId"]],
+            Scheme="internal",
+            Type="network",
+        )["LoadBalancers"][0]["LoadBalancerArn"]
+
+        endpoint_id = ec2_client.create_vpc_endpoint_service_configuration(
+            NetworkLoadBalancerArns=[lb_arn]
+        )["ServiceConfiguration"]["ServiceId"]
+
+        # Add allowed principals
+        ec2_client.modify_vpc_endpoint_service_permissions(
+            ServiceId=endpoint_id, AddAllowedPrincipals=[AWS_ACCOUNT_NUMBER]
+        )
+
+        endpoint_arn = f"arn:aws:ec2:{AWS_REGION_US_EAST_1}:{AWS_ACCOUNT_NUMBER}:vpc-endpoint-service/{endpoint_id}"
+
+        from prowler.providers.aws.services.vpc.vpc_service import VPC
+
+        current_audit_info = set_mocked_aws_audit_info(
+            audited_regions=[AWS_REGION_US_EAST_1]
+        )
+        # Set config variable
+        current_audit_info.audit_config = {"trusted_account_ids": []}
+
+        with mock.patch(
+            "prowler.providers.aws.lib.audit_info.audit_info.current_audit_info",
+            new=current_audit_info,
+        ):
+            with mock.patch(
+                "prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_client",
+                new=VPC(current_audit_info),
+            ):
+                # Test Check
+                from prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries import (
+                    vpc_endpoint_services_allowed_principals_trust_boundaries,
+                )
+
+                check = vpc_endpoint_services_allowed_principals_trust_boundaries()
+                result = check.execute()
+
+                assert len(result) == 1
+                assert result[0].status == "PASS"
+                assert (
+                    result[0].status_extended
+                    == f"Found trusted account {AWS_ACCOUNT_NUMBER} in VPC Endpoint Service {endpoint_id}."
+                )
+                assert result[0].resource_id == endpoint_id
+                assert result[0].resource_arn == endpoint_arn
+                assert result[0].resource_tags == []
+                assert result[0].region == AWS_REGION_US_EAST_1
+
+    @mock_ec2
+    @mock_elbv2
+    def test_vpc_endpoint_service_with_principal_not_allowed(self):
+        # Create VPC Mocked Resources
+        ec2_client = client("ec2", region_name=AWS_REGION_US_EAST_1)
+        elbv2_client = client("elbv2", region_name=AWS_REGION_US_EAST_1)
+
+        vpc = ec2_client.create_vpc(
+            CidrBlock="172.28.7.0/24", InstanceTenancy="default"
+        )
+        subnet = ec2_client.create_subnet(
+            VpcId=vpc["Vpc"]["VpcId"],
+            CidrBlock="172.28.7.192/26",
+            AvailabilityZone=f"{AWS_REGION_US_EAST_1}a",
+        )
+        lb_name = "lb_vpce-test"
+        lb_arn = elbv2_client.create_load_balancer(
+            Name=lb_name,
+            Subnets=[subnet["Subnet"]["SubnetId"]],
+            Scheme="internal",
+            Type="network",
+        )["LoadBalancers"][0]["LoadBalancerArn"]
+
+        endpoint_id = ec2_client.create_vpc_endpoint_service_configuration(
+            NetworkLoadBalancerArns=[lb_arn]
+        )["ServiceConfiguration"]["ServiceId"]
+
+        # Add allowed principals
+        ec2_client.modify_vpc_endpoint_service_permissions(
+            ServiceId=endpoint_id, AddAllowedPrincipals=[AWS_ACCOUNT_NUMBER_2]
+        )
+
+        endpoint_arn = f"arn:aws:ec2:{AWS_REGION_US_EAST_1}:{AWS_ACCOUNT_NUMBER}:vpc-endpoint-service/{endpoint_id}"
+
+        from prowler.providers.aws.services.vpc.vpc_service import VPC
+
+        current_audit_info = set_mocked_aws_audit_info(
+            audited_regions=[AWS_REGION_US_EAST_1]
+        )
+        # Set config variable
+        current_audit_info.audit_config = {"trusted_account_ids": []}
+
+        with mock.patch(
+            "prowler.providers.aws.lib.audit_info.audit_info.current_audit_info",
+            new=current_audit_info,
+        ):
+            with mock.patch(
+                "prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_client",
+                new=VPC(current_audit_info),
+            ):
+                # Test Check
+                from prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries import (
+                    vpc_endpoint_services_allowed_principals_trust_boundaries,
+                )
+
+                check = vpc_endpoint_services_allowed_principals_trust_boundaries()
+                result = check.execute()
+
+                assert len(result) == 1
+                assert result[0].status == "FAIL"
+                assert (
+                    result[0].status_extended
+                    == f"Found untrusted account {AWS_ACCOUNT_NUMBER_2} in VPC Endpoint Service {endpoint_id}."
+                )
+                assert result[0].resource_id == endpoint_id
+                assert result[0].resource_arn == endpoint_arn
+                assert result[0].resource_tags == []
+                assert result[0].region == AWS_REGION_US_EAST_1
+
+    @mock_ec2
+    @mock_elbv2
+    def test_vpc_endpoint_service_with_principal_different_than_account_but_allowed_in_config(
+        self,
+    ):
+        # Create VPC Mocked Resources
+        ec2_client = client("ec2", region_name=AWS_REGION_US_EAST_1)
+        elbv2_client = client("elbv2", region_name=AWS_REGION_US_EAST_1)
+
+        vpc = ec2_client.create_vpc(
+            CidrBlock="172.28.7.0/24", InstanceTenancy="default"
+        )
+        subnet = ec2_client.create_subnet(
+            VpcId=vpc["Vpc"]["VpcId"],
+            CidrBlock="172.28.7.192/26",
+            AvailabilityZone=f"{AWS_REGION_US_EAST_1}a",
+        )
+        lb_name = "lb_vpce-test"
+        lb_arn = elbv2_client.create_load_balancer(
+            Name=lb_name,
+            Subnets=[subnet["Subnet"]["SubnetId"]],
+            Scheme="internal",
+            Type="network",
+        )["LoadBalancers"][0]["LoadBalancerArn"]
+
+        endpoint_id = ec2_client.create_vpc_endpoint_service_configuration(
+            NetworkLoadBalancerArns=[lb_arn]
+        )["ServiceConfiguration"]["ServiceId"]
+
+        # Add allowed principals
+        ec2_client.modify_vpc_endpoint_service_permissions(
+            ServiceId=endpoint_id, AddAllowedPrincipals=[AWS_ACCOUNT_NUMBER_2]
+        )
+
+        endpoint_arn = f"arn:aws:ec2:{AWS_REGION_US_EAST_1}:{AWS_ACCOUNT_NUMBER}:vpc-endpoint-service/{endpoint_id}"
+
+        from prowler.providers.aws.services.vpc.vpc_service import VPC
+
+        current_audit_info = set_mocked_aws_audit_info(
+            audited_regions=[AWS_REGION_US_EAST_1]
+        )
+        # Set config variable
+        current_audit_info.audit_config = {
+            "trusted_account_ids": [AWS_ACCOUNT_NUMBER_2]
+        }
+
+        with mock.patch(
+            "prowler.providers.aws.lib.audit_info.audit_info.current_audit_info",
+            new=current_audit_info,
+        ):
+            with mock.patch(
+                "prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_client",
+                new=VPC(current_audit_info),
+            ):
+                # Test Check
+                from prowler.providers.aws.services.vpc.vpc_endpoint_services_allowed_principals_trust_boundaries.vpc_endpoint_services_allowed_principals_trust_boundaries import (
+                    vpc_endpoint_services_allowed_principals_trust_boundaries,
+                )
+
+                check = vpc_endpoint_services_allowed_principals_trust_boundaries()
+                result = check.execute()
+
+                assert len(result) == 1
+                assert result[0].status == "PASS"
+                assert (
+                    result[0].status_extended
+                    == f"Found trusted account {AWS_ACCOUNT_NUMBER_2} in VPC Endpoint Service {endpoint_id}."
+                )
+                assert result[0].resource_id == endpoint_id
+                assert result[0].resource_arn == endpoint_arn
+                assert result[0].resource_tags == []
+                assert result[0].region == AWS_REGION_US_EAST_1