feat(exchange): add new check exchange_organization_modern_authentication_enabled (#7636)

Co-authored-by: Andoni A. <14891798+andoniaf@users.noreply.github.com>

prowler/CHANGELOG.md

@@ -36,6 +36,7 @@ All notable changes to the **Prowler SDK** are documented in this file.
 - Add new check `teams_meeting_presenters_restricted` [(#7613)](https://github.com/prowler-cloud/prowler/pull/7613)
 - Add new check `teams_meeting_chat_anonymous_users_disabled` [(#7579)](https://github.com/prowler-cloud/prowler/pull/7579)
 - Add Prowler Threat Score Compliance Framework [(#7603)](https://github.com/prowler-cloud/prowler/pull/7603)
+- Add new check for Modern Authentication enabled for Exchange Online in M365 [(#7636)](https://github.com/prowler-cloud/prowler/pull/7636)
 - Add new check `sharepoint_onedrive_sync_restricted_unmanaged_devices` [(#7589)](https://github.com/prowler-cloud/prowler/pull/7589)
 - Add new check for Additional Storage restricted for Exchange in M365 [(#7638)](https://github.com/prowler-cloud/prowler/pull/7638)
 - Add new check for Roles Assignment Policy with no AddIns for Exchange in M365 [(#7644)](https://github.com/prowler-cloud/prowler/pull/7644)

prowler/providers/m365/services/exchange/exchange_organization_modern_authentication_enabled/exchange_organization_modern_authentication_enabled.metadata.json

@@ -0,0 +1,30 @@
+{
+  "Provider": "m365",
+  "CheckID": "exchange_organization_modern_authentication_enabled",
+  "CheckTitle": "Ensure Modern Authentication for Exchange Online is enabled.",
+  "CheckType": [],
+  "ServiceName": "exchange",
+  "SubServiceName": "",
+  "ResourceIdTemplate": "",
+  "Severity": "critical",
+  "ResourceType": "Exchange Organization Configuration",
+  "Description": "Ensure that modern authentication is enabled for Exchange Online, requiring exchange and mailboxes clients to use strong authentication mechanisms instead of basic authentication.",
+  "Risk": "If modern authentication is not enabled, Exchange Online email clients may fall back to basic authentication, making it easier for attackers to bypass multifactor authentication and compromise user credentials.",
+  "RelatedUrl": "https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/enable-or-disable-modern-authentication-in-exchange-online",
+  "Remediation": {
+    "Code": {
+      "CLI": "Set-OrganizationConfig -OAuth2ClientProfileEnabled $True",
+      "NativeIaC": "",
+      "Other": "",
+      "Terraform": ""
+    },
+    "Recommendation": {
+      "Text": "Enable modern authentication in Exchange Online to enforce secure authentication methods for email clients.",
+      "Url": "https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/enable-or-disable-modern-authentication-in-exchange-online"
+    }
+  },
+  "Categories": [],
+  "DependsOn": [],
+  "RelatedTo": [],
+  "Notes": ""
+}

prowler/providers/m365/services/exchange/exchange_organization_modern_authentication_enabled/exchange_organization_modern_authentication_enabled.py

@@ -0,0 +1,46 @@
+from typing import List
+
+from prowler.lib.check.models import Check, CheckReportM365
+from prowler.providers.m365.services.exchange.exchange_client import exchange_client
+
+
+class exchange_organization_modern_authentication_enabled(Check):
+    """
+    Check if Modern Authentication is enabled for Exchange Online.
+
+    Attributes:
+        metadata: Metadata associated with the check (inherited from Check).
+    """
+
+    def execute(self) -> List[CheckReportM365]:
+        """
+        Execute the check for Modern Authentication in Exchange Online.
+
+        This method checks if Modern Authentication is enabled in the Exchange organization configuration.
+
+        Returns:
+            List[CheckReportM365]: A list of reports containing the result of the check.
+        """
+        findings = []
+        organization_config = exchange_client.organization_config
+        if organization_config:
+            report = CheckReportM365(
+                metadata=self.metadata(),
+                resource=organization_config,
+                resource_name=organization_config.name,
+                resource_id=organization_config.guid,
+            )
+            report.status = "FAIL"
+            report.status_extended = (
+                "Modern Authentication is not enabled for Exchange Online."
+            )
+
+            if organization_config.oauth_enabled:
+                report.status = "PASS"
+                report.status_extended = (
+                    "Modern Authentication is enabled for Exchange Online."
+                )
+
+            findings.append(report)
+
+        return findings

prowler/providers/m365/services/exchange/exchange_service.py

@@ -44,6 +44,9 @@ class Exchange(M365Service):
                     audit_disabled=organization_configuration.get(
                         "AuditDisabled", False
                     ),
+                    oauth_enabled=organization_configuration.get(
+                        "OAuth2ClientProfileEnabled", True
+                    ),
                     mailtips_enabled=organization_configuration.get(
                         "MailTipsAllTipsEnabled", True
                     ),
@@ -235,6 +238,7 @@ class Organization(BaseModel):
     name: str
     guid: str
     audit_disabled: bool
+    oauth_enabled: bool
     mailtips_enabled: bool
     mailtips_external_recipient_enabled: bool
     mailtips_group_metrics_enabled: bool

tests/providers/m365/services/exchange/exchange_organization_mailbox_auditing_enabled/exchange_organization_mailbox_auditing_enabled_test.py

@@ -60,6 +60,7 @@ class Test_exchange_organization_mailbox_auditing_enabled:
                 audit_disabled=True,
                 name="test",
                 guid="test",
+                oauth_enabled=True,
                 mailtips_enabled=True,
                 mailtips_external_recipient_enabled=True,
                 mailtips_group_metrics_enabled=True,
@@ -108,6 +109,7 @@ class Test_exchange_organization_mailbox_auditing_enabled:
                 audit_disabled=False,
                 name="test",
                 guid="test",
+                oauth_enabled=True,
                 mailtips_enabled=True,
                 mailtips_external_recipient_enabled=True,
                 mailtips_group_metrics_enabled=True,

tests/providers/m365/services/exchange/exchange_organization_mailtips_enabled/exchange_organization_mailtips_enabled_test.py

@@ -64,6 +64,7 @@ class Test_exchange_organization_mailtips_enabled:
                 name="test-org",
                 guid="org-guid",
                 audit_disabled=False,
+                oauth_enabled=True,
                 mailtips_enabled=False,
                 mailtips_external_recipient_enabled=False,
                 mailtips_group_metrics_enabled=True,
@@ -116,6 +117,7 @@ class Test_exchange_organization_mailtips_enabled:
                 name="test-org",
                 guid="org-guid",
                 audit_disabled=False,
+                oauth_enabled=True,
                 mailtips_enabled=True,
                 mailtips_external_recipient_enabled=True,
                 mailtips_group_metrics_enabled=True,

tests/providers/m365/services/exchange/exchange_organization_modern_authentication_enabled/exchange_organization_modern_authentication_enabled_test.py

@@ -0,0 +1,130 @@
+from unittest import mock
+
+from tests.providers.m365.m365_fixtures import DOMAIN, set_mocked_m365_provider
+
+
+class Test_exchange_organization_modern_authentication_enabled:
+    def test_no_organization(self):
+        exchange_client = mock.MagicMock()
+        exchange_client.audited_tenant = "audited_tenant"
+        exchange_client.audited_domain = DOMAIN
+        exchange_client.organization_config = None
+
+        with (
+            mock.patch(
+                "prowler.providers.common.provider.Provider.get_global_provider",
+                return_value=set_mocked_m365_provider(),
+            ),
+            mock.patch(
+                "prowler.providers.m365.lib.powershell.m365_powershell.M365PowerShell.connect_exchange_online"
+            ),
+            mock.patch(
+                "prowler.providers.m365.services.exchange.exchange_organization_modern_authentication_enabled.exchange_organization_modern_authentication_enabled.exchange_client",
+                new=exchange_client,
+            ),
+        ):
+            from prowler.providers.m365.services.exchange.exchange_organization_modern_authentication_enabled.exchange_organization_modern_authentication_enabled import (
+                exchange_organization_modern_authentication_enabled,
+            )
+
+            check = exchange_organization_modern_authentication_enabled()
+            result = check.execute()
+            assert len(result) == 0
+
+    def test_modern_authentication_disabled(self):
+        exchange_client = mock.MagicMock()
+        exchange_client.audited_tenant = "audited_tenant"
+        exchange_client.audited_domain = DOMAIN
+
+        with (
+            mock.patch(
+                "prowler.providers.common.provider.Provider.get_global_provider",
+                return_value=set_mocked_m365_provider(),
+            ),
+            mock.patch(
+                "prowler.providers.m365.lib.powershell.m365_powershell.M365PowerShell.connect_exchange_online"
+            ),
+            mock.patch(
+                "prowler.providers.m365.services.exchange.exchange_organization_modern_authentication_enabled.exchange_organization_modern_authentication_enabled.exchange_client",
+                new=exchange_client,
+            ),
+        ):
+            from prowler.providers.m365.services.exchange.exchange_organization_modern_authentication_enabled.exchange_organization_modern_authentication_enabled import (
+                exchange_organization_modern_authentication_enabled,
+            )
+            from prowler.providers.m365.services.exchange.exchange_service import (
+                Organization,
+            )
+
+            exchange_client.organization_config = Organization(
+                oauth_enabled=False,
+                name="test",
+                guid="test",
+                audit_disabled=False,
+                mailtips_enabled=False,
+                mailtips_external_recipient_enabled=False,
+                mailtips_group_metrics_enabled=True,
+                mailtips_large_audience_threshold=25,
+            )
+
+            check = exchange_organization_modern_authentication_enabled()
+            result = check.execute()
+            assert len(result) == 1
+            assert result[0].status == "FAIL"
+            assert (
+                result[0].status_extended
+                == "Modern Authentication is not enabled for Exchange Online."
+            )
+            assert result[0].resource == exchange_client.organization_config.dict()
+            assert result[0].resource_name == "test"
+            assert result[0].resource_id == "test"
+            assert result[0].location == "global"
+
+    def test_modern_authentication_enabled(self):
+        exchange_client = mock.MagicMock()
+        exchange_client.audited_tenant = "audited_tenant"
+        exchange_client.audited_domain = DOMAIN
+
+        with (
+            mock.patch(
+                "prowler.providers.common.provider.Provider.get_global_provider",
+                return_value=set_mocked_m365_provider(),
+            ),
+            mock.patch(
+                "prowler.providers.m365.lib.powershell.m365_powershell.M365PowerShell.connect_exchange_online"
+            ),
+            mock.patch(
+                "prowler.providers.m365.services.exchange.exchange_organization_modern_authentication_enabled.exchange_organization_modern_authentication_enabled.exchange_client",
+                new=exchange_client,
+            ),
+        ):
+            from prowler.providers.m365.services.exchange.exchange_organization_modern_authentication_enabled.exchange_organization_modern_authentication_enabled import (
+                exchange_organization_modern_authentication_enabled,
+            )
+            from prowler.providers.m365.services.exchange.exchange_service import (
+                Organization,
+            )
+
+            exchange_client.organization_config = Organization(
+                oauth_enabled=True,
+                name="test",
+                guid="test",
+                audit_disabled=False,
+                mailtips_enabled=False,
+                mailtips_external_recipient_enabled=False,
+                mailtips_group_metrics_enabled=True,
+                mailtips_large_audience_threshold=25,
+            )
+
+            check = exchange_organization_modern_authentication_enabled()
+            result = check.execute()
+            assert len(result) == 1
+            assert result[0].status == "PASS"
+            assert (
+                result[0].status_extended
+                == "Modern Authentication is enabled for Exchange Online."
+            )
+            assert result[0].resource == exchange_client.organization_config.dict()
+            assert result[0].resource_name == "test"
+            assert result[0].resource_id == "test"
+            assert result[0].location == "global"

tests/providers/m365/services/exchange/exchange_service_test.py

@@ -21,6 +21,7 @@ def mock_exchange_get_organization_config(_):
         audit_disabled=True,
         name="test",
         guid="test",
+        oauth_enabled=True,
         mailtips_enabled=True,
         mailtips_external_recipient_enabled=False,
         mailtips_group_metrics_enabled=True,
@@ -183,6 +184,7 @@ class Test_Exchange_Service:
             assert organization_config.name == "test"
             assert organization_config.guid == "test"
             assert organization_config.audit_disabled is True
+            assert organization_config.oauth_enabled is True
             assert organization_config.mailtips_enabled is True
             assert organization_config.mailtips_external_recipient_enabled is False
             assert organization_config.mailtips_group_metrics_enabled is True