reject users whose role was removed from the config

A user whose role was removed from the config fell back to viewer, which has no camera restrictions, so a restricted role removed from yaml gained access to every camera. /auth now rejects that user's tokens, and login refuses them until an admin assigns a valid role.

frigate/api/auth.py

@@ -824,9 +824,11 @@ def auth(request: Request):
             logger.debug("jwt token issued before password change")
             return fail_response
 
-        # matches the fallback login applies to a role removed from the config
         if role not in auth_config.roles:
-            role = "viewer"
+            logger.debug(
+                "jwt user %s has role %s, which is not in the config", user, role
+            )
+            return fail_response
 
         current_time = int(time.time())
 
@@ -961,13 +963,16 @@ def login(request: Request, body: AppPostLoginBody):
 
     password_hash = db_user.password_hash
     if verify_password(password, password_hash):
-        role = getattr(db_user, "role", "viewer")
-        config_roles_set = set(request.app.frigate_config.auth.roles.keys())
-        if role not in config_roles_set:
+        role = db_user.role
+        if role not in request.app.frigate_config.auth.roles:
             logger.warning(
-                f"User {db_user.username} has an invalid role {role}, falling back to 'viewer'."
+                "Login refused for user '%s' with role '%s', which is not in the config",
+                user,
+                role,
             )
-            role = "viewer"
+            failed_logins.record(user, time.time(), known=True)
+            return JSONResponse(content={"message": "Login failed"}, status_code=401)
+
         expiration = int(time.time()) + JWT_SESSION_LENGTH
         encoded_jwt = create_encoded_jwt(user, role, expiration, request.app.jwt_token)
         response = Response("", 200)

frigate/test/http_api/test_http_auth_jwt_role.py

@@ -115,14 +115,22 @@ class TestAuthJwtRole(BaseTestHttp):
         self.assertEqual(resp.status_code, 202)
         self.assertEqual(resp.headers["remote-role"], "garage")
 
-    def test_role_removed_from_config_falls_back_to_viewer(self):
+    def test_role_removed_from_config_is_rejected(self):
         User.update(role="removed_role").where(User.username == "bob").execute()
         app = self._create_app()
         with AuthTestClient(app) as client:
-            resp = self._auth(client, self._token(app, "bob", "removed_role"))
+            for source in ("bearer", "cookie"):
+                resp = self._auth(client, self._token(app, "bob", "garage"), source)
+                self.assertEqual(resp.status_code, 401)
+                self.assertNotIn("remote-role", resp.headers)
 
-        self.assertEqual(resp.status_code, 202)
-        self.assertEqual(resp.headers["remote-role"], "viewer")
+    def test_login_refused_for_role_removed_from_config(self):
+        User.update(role="removed_role").where(User.username == "bob").execute()
+        with AuthTestClient(self._create_app()) as client:
+            resp = client.post("/login", json={"user": "bob", "password": PASSWORD})
+
+        self.assertEqual(resp.status_code, 401)
+        self.assertNotIn("set-cookie", resp.headers)
 
     def test_demoted_user_gets_new_role_on_next_request(self):
         app = self._create_app()