security: List whether each app is sandboxed

Signed-off-by: James Valleroy <jvalleroy@mailbox.org>
[sunil: i18n for yes, no, N/A strings, avoid changing an i18ned string]
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/security/__init__.py

@@ -113,8 +113,8 @@ def set_restricted_access(enabled):
     actions.superuser_run('security', [action])
 
 
-def get_vulnerability_counts():
-    """Return number of security vulnerabilities for each app"""
+def get_apps_report():
+    """Return a security report for each app"""
     lines = subprocess.check_output(['debsecan']).decode().split('\n')
     cves = defaultdict(set)
     for line in lines:
@@ -132,12 +132,12 @@ def get_vulnerability_counts():
         'freedombox': {
             'name': 'freedombox',
             'packages': {'freedombox'},
-            'count': 0,
-            'past_count': 0 if past_cves else None,
+            'vulns': 0,
+            'past_vulns': 0 if past_cves else None,
         }
     }
     if past_cves and 'freedombox' in past_cves:
-        apps['freedombox']['past_count'] = len(past_cves['freedombox'])
+        apps['freedombox']['past_vulns'] = len(past_cves['freedombox'])
 
     for module_name, module in module_loader.loaded_modules.items():
         try:
@@ -145,6 +145,11 @@ def get_vulnerability_counts():
         except AttributeError:
             continue  # app has no managed packages
 
+        try:
+            services = module.managed_services
+        except AttributeError:
+            services = None
+
         # filter out apps not setup yet
         if module.setup_helper.get_state() == 'needs-setup':
             continue
@@ -152,17 +157,56 @@ def get_vulnerability_counts():
         apps[module_name] = {
             'name': module_name,
             'packages': set(packages),
-            'count': 0,
-            'past_count': 0 if past_cves else None,
+            'vulns': 0,
+            'past_vulns': 0 if past_cves else None,
+            'sandboxed': None,
         }
 
         for package in packages:
             if past_cves and package in past_cves:
-                apps[module_name]['past_count'] += len(past_cves[package])
+                apps[module_name]['past_vulns'] += len(past_cves[package])
+
+        if services:
+            apps[module_name]['sandboxed'] = False
+            for service in services:
+                if _get_service_is_sandboxed(service):
+                    apps[module_name]['sandboxed'] = True
 
     for cve_packages in cves.values():
         for app_ in apps.values():
             if cve_packages & app_['packages']:
-                app_['count'] += 1
+                app_['vulns'] += 1
 
     return apps
+
+
+def _get_service_is_sandboxed(service):
+    """Return whether service is sandboxed."""
+    lines = subprocess.check_output([
+        'systemctl',
+        'show',
+        service,
+        '--property=ProtectSystem',
+        '--property=ProtectHome',
+        '--property=PrivateTmp',
+        '--property=PrivateDevices',
+        '--property=PrivateNetwork',
+        '--property=PrivateUsers',
+        '--property=PrivateMounts',
+    ]).decode().strip().split('\n')
+    pairs = [line.partition('=')[::2] for line in lines]
+    properties = {name: value for name, value in pairs}
+    if properties['ProtectSystem'] in ['yes', 'full', 'strict']:
+        return True
+
+    if properties['ProtectHome'] in ['yes', 'read-only', 'tmpfs']:
+        return True
+
+    for name in [
+            'PrivateTmp', 'PrivateDevices', 'PrivateNetwork', 'PrivateUsers',
+            'PrivateMounts'
+    ]:
+        if properties[name] == 'yes':
+            return True
+
+    return False

plinth/modules/security/templates/security_report.html

@@ -24,7 +24,7 @@
 {% block content %}
   <h3>{% trans "Security Report" %}</h3>
   <p>
-    {% blocktrans trimmed with count=freedombox_vulns.count %}
+    {% blocktrans trimmed with count=freedombox_report.vulns %}
       The installed version of FreedomBox has {{ count }} reported security
       vulnerabilities.
     {% endblocktrans %}
@@ -32,7 +32,8 @@
   <p>
     {% blocktrans trimmed %}
       The following table lists the current reported number, and historical
-      count, of security vulnerabilities for each installed app.
+      count, of security vulnerabilities for each installed app. It also lists
+      whether each service is using sandboxing features.
     {% endblocktrans %}
   </p>
   <table class="table table-bordered table-condensed table-striped">
@@ -41,14 +42,24 @@
         <th>{% trans "App Name" %}</th>
         <th>{% trans "Current Vulnerabilities" %}</th>
         <th>{% trans "Past Vulnerabilities" %}</th>
+        <th>{% trans "Sandboxed" %}</th>
       </tr>
     </thead>
     <tbody>
-      {% for app in apps_vulns %}
+      {% for app in apps_report %}
         <tr>
           <td>{{ app.name }}</td>
-          <td>{{ app.count }}</td>
-          <td>{{ app.past_count|default_if_none:"❗"}}</td>
+          <td>{{ app.vulns }}</td>
+          <td>{{ app.past_vulns|default_if_none:"❗"}}</td>
+          <td>
+            {% if app.sandboxed is None %}
+              {% trans "N/A" %}
+            {% elif app.sandboxed %}
+              {% trans "Yes" %}
+            {% else %}
+              {% trans "No" %}
+            {% endif %}
+          </td>
         </tr>
       {% endfor %}
     </tbody>

plinth/modules/security/views.py

@@ -80,14 +80,13 @@ def _apply_changes(request, old_status, new_status):
 
 def report(request):
     """Serve the security report page"""
-    vulnerability_counts = security.get_vulnerability_counts()
+    apps_report = security.get_apps_report()
     return TemplateResponse(
         request, 'security_report.html', {
             'title':
                 _('Security Report'),
-            'freedombox_vulns':
-                vulnerability_counts.pop('freedombox'),
-            'apps_vulns':
-                sorted(vulnerability_counts.values(),
-                       key=lambda app: app['name']),
+            'freedombox_report':
+                apps_report.pop('freedombox'),
+            'apps_report':
+                sorted(apps_report.values(), key=lambda app: app['name']),
         })