diff --git a/litellm/proxy/_types.py b/litellm/proxy/_types.py index bb26350e1b1..73efd032e07 100644 --- a/litellm/proxy/_types.py +++ b/litellm/proxy/_types.py @@ -2539,6 +2539,16 @@ class ConfigGeneralSettings(LiteLLMPydanticObjectBase): description="sends alerts if requests hang for 5min+", ) ui_access_mode: Literal["admin_only", "all"] | None = Field("all", description="Control access to the Proxy UI") + max_failed_login_attempts: int | None = Field( + None, + ge=1, + description="Number of failed Admin UI sign-in attempts allowed for one username from one source address within `failed_login_window_seconds`, before further attempts are refused with 429. Configurable from config.yaml only. Defaults to 10", + ) + failed_login_window_seconds: int | None = Field( + None, + ge=1, + description="Fixed window in seconds over which failed Admin UI sign-in attempts are counted. The window starts at the first failure and is not extended by later ones. Configurable from config.yaml only. Defaults to 900", + ) allowed_routes: list | None = Field(None, description="Proxy API Endpoints you want users to be able to access") reject_clientside_metadata_tags: bool | None = Field( None, diff --git a/litellm/proxy/auth/login_throttle.py b/litellm/proxy/auth/login_throttle.py new file mode 100644 index 00000000000..e2befd15a35 --- /dev/null +++ b/litellm/proxy/auth/login_throttle.py @@ -0,0 +1,177 @@ +"""Failed-login accounting for the Admin UI sign-in path. + +Counts failed credential checks per (username, source address) over a fixed window and +denies further attempts with 429 once the count reaches the limit. Built per request by +``LoginThrottle.from_request`` because it carries that request's resolved source address, +and because the coordination cache is assigned at startup and can be reassigned later. +""" + +import hashlib +from collections.abc import Awaitable +from dataclasses import dataclass +from types import MappingProxyType +from typing import Final + +from fastapi import Request + +from litellm._logging import verbose_proxy_logger +from litellm.caching.dual_cache import DualCache +from litellm.caching.in_memory_cache import InMemoryCache +from litellm.caching.redis_cache import RedisCache +from litellm.proxy._types import ProxyErrorTypes, ProxyException +from litellm.proxy.auth.network import TrustedProxyConfig, normalize_cidr_ranges, resolve_client_ip +from litellm.proxy.auth.trusted_proxy_utils import TRUSTED_PROXY_RANGES_KEY +from litellm.secret_managers.main import get_secret_bool + +DEFAULT_MAX_FAILED_LOGIN_ATTEMPTS: Final = 10 +DEFAULT_FAILED_LOGIN_WINDOW_SECONDS: Final = 900 + +_CACHE_KEY_PREFIX: Final = "login_fail" +_UNKNOWN_SOURCE: Final = "unknown" +_MAX_LOGGED_USERNAME_CHARS: Final = 128 + +_MAX_TRACKED_LOGIN_SOURCES: Final = 10_000 + +_FAILED_LOGIN_CACHE: Final = DualCache( + in_memory_cache=InMemoryCache(max_size_in_memory=_MAX_TRACKED_LOGIN_SOURCES), + default_in_memory_ttl=DEFAULT_FAILED_LOGIN_WINDOW_SECONDS, +) +_NO_SETTINGS: Final = MappingProxyType({}) + + +def _int_setting(name: str, value: object, default: int, minimum: int) -> int: + if value is None: + return default + if isinstance(value, bool) or not isinstance(value, int) or value < minimum: + verbose_proxy_logger.warning( + "general_settings.%s=%r is not an integer >= %s; using the default of %s", name, value, minimum, default + ) + return default + return value + + +def _as_count(cached: object) -> int: + return int(cached) if isinstance(cached, int | float) and not isinstance(cached, bool) else 0 + + +@dataclass(frozen=True, slots=True) +class LoginThrottle: + """Fixed-window failed-login accounting for one request's source address.""" + + client_ip: str + max_attempts: int + window_seconds: int + cache: DualCache + redis_cache: RedisCache | None = None + enabled: bool = True + + @classmethod + def from_request(cls, request: Request) -> "LoginThrottle": + """Build the throttle for this request from the live proxy settings and caches.""" + from litellm.proxy.proxy_server import general_settings, redis_usage_cache + + settings: Final = general_settings or _NO_SETTINGS + cidrs: Final = normalize_cidr_ranges( + settings.get(TRUSTED_PROXY_RANGES_KEY), setting_name=TRUSTED_PROXY_RANGES_KEY + ) + resolved, _ = resolve_client_ip( + request, TrustedProxyConfig(use_forwarded_for=bool(cidrs), trusted_proxy_cidrs=cidrs) + ) + return cls( + client_ip=resolved or _UNKNOWN_SOURCE, + max_attempts=_int_setting( + "max_failed_login_attempts", + settings.get("max_failed_login_attempts"), + DEFAULT_MAX_FAILED_LOGIN_ATTEMPTS, + 1, + ), + window_seconds=_int_setting( + "failed_login_window_seconds", + settings.get("failed_login_window_seconds"), + DEFAULT_FAILED_LOGIN_WINDOW_SECONDS, + 1, + ), + cache=_FAILED_LOGIN_CACHE, + redis_cache=redis_usage_cache, + enabled=not get_secret_bool("LITELLM_DISABLE_LOGIN_RATE_LIMIT"), + ) + + @staticmethod + def _loggable(username: str) -> str: + """The username with anything that could forge a log line removed.""" + return "".join(c for c in username if c.isprintable())[:_MAX_LOGGED_USERNAME_CHARS] + + def _key(self, username: str) -> str: + identity: Final = hashlib.sha256(username.casefold().encode("utf-8")).hexdigest() + return f"{_CACHE_KEY_PREFIX}:{identity}:{self.client_ip}" + + async def _outcome(self, work: Awaitable[object]) -> object: + try: + return await work + except Exception as exc: # noqa: BLE001 # an unreachable cache must never deny a valid credential + verbose_proxy_logger.warning("login attempt accounting unavailable: %s", exc) + return None + + async def _failures(self, key: str) -> int: + store: Final = self.cache if self.redis_cache is None else self.redis_cache + return _as_count(await self._outcome(store.async_get_cache(key=key))) + + async def _ensure_expiry(self, key: str) -> None: + """Give the counter an expiry if it somehow has none. + + Redis commits the increment before setting the TTL, so a failure in between can + leave a counter that never expires. Nothing increments the key again once the + limit is reached, so without this the pair would stay refused indefinitely. + """ + redis_cache: Final = self.redis_cache + if redis_cache is None: + return + if isinstance(await self._outcome(redis_cache.async_get_ttl(key)), int): + return + await self._outcome(redis_cache.async_increment(key, 0, ttl=self.window_seconds)) + + async def raise_if_blocked(self, username: str) -> None: + """Deny before the database lookup and before the password comparison.""" + if not self.enabled: + return + key: Final = self._key(username) + if await self._failures(key) < self.max_attempts: + return + await self._ensure_expiry(key) + verbose_proxy_logger.warning( + "Admin UI sign-in attempts exhausted for username=%s source=%s; %s attempts in %ss, retry after %ss", + self._loggable(username), + self.client_ip, + self.max_attempts, + self.window_seconds, + self.window_seconds, + ) + raise ProxyException( + message="Too many failed sign-in attempts. Try again later.", + type=ProxyErrorTypes.auth_error, + param="max_failed_login_attempts", + code=429, + headers={"Retry-After": str(self.window_seconds)}, # mutable-ok: ProxyException coerces header values + ) + + async def record_failure(self, username: str) -> None: + """Count one rejected credential guess against this username and source.""" + if not self.enabled: + return + key: Final = self._key(username) + redis_cache: Final = self.redis_cache + if redis_cache is not None: + await self._outcome(redis_cache.async_increment(key, 1, ttl=self.window_seconds)) + await self._ensure_expiry(key) + return + await self._outcome(self.cache.async_increment_cache(key=key, value=1, ttl=self.window_seconds)) + + async def clear(self, username: str) -> None: + """Drop the bucket after a successful sign-in.""" + if not self.enabled: + return + key: Final = self._key(username) + redis_cache: Final = self.redis_cache + if redis_cache is not None: + await self._outcome(redis_cache.async_delete_cache(key)) + await self._outcome(self.cache.async_delete_cache(key=key)) diff --git a/litellm/proxy/auth/login_utils.py b/litellm/proxy/auth/login_utils.py index fba95972944..98780a4692a 100644 --- a/litellm/proxy/auth/login_utils.py +++ b/litellm/proxy/auth/login_utils.py @@ -24,6 +24,7 @@ from litellm.proxy._types import ( UpdateUserRequest, UserAPIKeyAuth, ) +from litellm.proxy.auth.login_throttle import LoginThrottle from litellm.proxy.management_endpoints.internal_user_endpoints import user_update from litellm.proxy.management_endpoints.key_management_endpoints import ( generate_key_helper_fn, @@ -41,6 +42,10 @@ from litellm.repositories.user_repository import UserRepository from litellm.secret_managers.main import get_secret_bool from litellm.types.proxy.ui_sso import ReturnedUITokenObject +INVALID_UI_CREDENTIALS_MESSAGE: Final = ( + "Invalid credentials used to access UI. Check 'UI_USERNAME' and 'UI_PASSWORD', or the password set for your user" +) + async def _rehash_password_if_needed(user_id: str, password: str, stored: str) -> None: """Rehash legacy password (SHA256) to scrypt on successful login.""" @@ -111,6 +116,7 @@ async def authenticate_user( password: str, master_key: str | None, prisma_client: PrismaClient | None, + throttle: LoginThrottle, ) -> LoginResult: """ Authenticate a user and generate an API key for UI access. @@ -139,6 +145,8 @@ async def authenticate_user( code=500, ) + await throttle.raise_if_blocked(username) + ui_username, ui_password = get_ui_credentials(master_key) # Check if we can find the `username` in the db. On the UI, users can enter username=their email @@ -240,6 +248,8 @@ async def authenticate_user( key = ExperimentalUIJWTToken.get_experimental_ui_login_jwt_auth_token(user_info) + await throttle.clear(username) + return LoginResult( user_id=user_id, key=key, @@ -294,6 +304,8 @@ async def authenticate_user( key = response["token"] + await throttle.clear(username) + return LoginResult( user_id=user_id, key=key, @@ -302,15 +314,17 @@ async def authenticate_user( login_method="username_password", ) else: + await throttle.record_failure(username) raise ProxyException( - message=f"Invalid credentials used to access UI.\nNot valid credentials for {username}", + message=INVALID_UI_CREDENTIALS_MESSAGE, type=ProxyErrorTypes.auth_error, param="invalid_credentials", code=401, ) else: + await throttle.record_failure(username) raise ProxyException( - message="Invalid credentials used to access UI.\nCheck 'UI_USERNAME', 'UI_PASSWORD' in .env file", + message=INVALID_UI_CREDENTIALS_MESSAGE, type=ProxyErrorTypes.auth_error, param="invalid_credentials", code=401, diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py index 990682f10a5..dc98a8b4ce8 100644 --- a/litellm/proxy/proxy_server.py +++ b/litellm/proxy/proxy_server.py @@ -292,6 +292,7 @@ from litellm.proxy.auth.auth_utils import ( ) from litellm.proxy.auth.handle_jwt import JWTHandler from litellm.proxy.auth.litellm_license import LicenseCheck +from litellm.proxy.auth.login_throttle import LoginThrottle from litellm.proxy.auth.model_checks import ( expand_wildcard_deployments_for_model_info, get_all_fallbacks, @@ -726,6 +727,7 @@ from fastapi.openapi.docs import get_swagger_ui_html from fastapi.openapi.utils import get_openapi from fastapi.responses import ( FileResponse, + HTMLResponse, JSONResponse, ORJSONResponse, RedirectResponse, @@ -14835,8 +14837,6 @@ async def fallback_login(request: Request): else: redirect_url += "/sso/callback" - from fastapi.responses import HTMLResponse - hide_default_credentials_hint: Final = ( os.getenv("LITELLM_HIDE_DEFAULT_CREDENTIALS_HINT", "false").lower() == "true" or general_settings.get("hide_default_credentials_hint", False) is True @@ -14866,6 +14866,7 @@ async def login(request: Request): password=password, master_key=master_key, prisma_client=prisma_client, + throttle=LoginThrottle.from_request(request), ) # Create UI token object @@ -14940,6 +14941,7 @@ async def login_v2(request: Request): password=password, master_key=master_key, prisma_client=prisma_client, + throttle=LoginThrottle.from_request(request), ) returned_ui_token_object: Final = create_ui_token_object( @@ -15010,6 +15012,7 @@ async def login_v3(request: Request): password=password, master_key=master_key, prisma_client=prisma_client, + throttle=LoginThrottle.from_request(request), ) returned_ui_token_object: Final = create_ui_token_object( diff --git a/tests/test_litellm/proxy/auth/test_login_utils.py b/tests/test_litellm/proxy/auth/test_login_utils.py index 1c66acf8678..1e3fcaf5d78 100644 --- a/tests/test_litellm/proxy/auth/test_login_utils.py +++ b/tests/test_litellm/proxy/auth/test_login_utils.py @@ -10,6 +10,16 @@ from unittest.mock import AsyncMock, MagicMock, patch import pytest + +def _unlimited_throttle(): + """A throttle wired to a real in-memory store with a limit no test can reach.""" + from litellm.caching.dual_cache import DualCache + from litellm.proxy.auth.login_throttle import LoginThrottle + + return LoginThrottle(client_ip="1.2.3.4", max_attempts=10_000, window_seconds=900, cache=DualCache()) + + + from litellm.constants import LITELLM_PROXY_ADMIN_NAME from litellm.proxy._types import ( LiteLLM_UserTable, @@ -98,6 +108,7 @@ async def test_authenticate_user_admin_login_with_ui_credentials(): password=ui_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert isinstance(result, LoginResult) @@ -155,6 +166,7 @@ async def test_authenticate_user_admin_login_with_master_key_as_password(monkeyp password=master_key, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert isinstance(result, LoginResult) @@ -179,6 +191,7 @@ async def test_authenticate_user_invalid_credentials(): password=wrong_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert exc_info.value.type == ProxyErrorTypes.auth_error @@ -197,6 +210,7 @@ async def test_authenticate_user_missing_master_key(): password="password", master_key=None, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert exc_info.value.type == ProxyErrorTypes.auth_error @@ -237,6 +251,7 @@ async def test_authenticate_user_wrong_password(): password=wrong_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert exc_info.value.type == ProxyErrorTypes.auth_error @@ -295,12 +310,14 @@ async def test_authenticate_user_email_case_insensitive_login(): password=correct_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) result_lower = await authenticate_user( username=stored_email, password=correct_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert result_mixed.user_id == result_lower.user_id == "test-user-123" @@ -342,6 +359,7 @@ async def test_authenticate_user_database_required_for_admin(monkeypatch): password=ui_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert exc_info.value.type == ProxyErrorTypes.auth_error @@ -393,6 +411,7 @@ async def test_authenticate_user_admin_login_with_non_ascii_characters(): password=ui_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert isinstance(result, LoginResult) @@ -469,18 +488,21 @@ async def test_authenticate_user_multiple_logins_generate_unique_tokens(): password=ui_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) result2 = await authenticate_user( username=ui_username, password=ui_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) result3 = await authenticate_user( username=ui_username, password=ui_password, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) # Each login should return a unique token @@ -538,6 +560,7 @@ async def test_authenticate_user_database_login_with_non_ascii_password(): password=password_with_special_char, master_key=master_key, prisma_client=mock_prisma_client, + throttle=_unlimited_throttle(), ) assert isinstance(result, LoginResult) @@ -598,3 +621,457 @@ class TestEncodeUiSessionJwt: request.cookies = {"token": token} with patch("litellm.proxy.proxy_server.master_key", "sk-master-for-tests"): assert _user_id_from_session_cookie(request) == "cornell-user" + + +# --------------------------------------------------------------------------- +# Failed-login accounting (LIT-5285) +# --------------------------------------------------------------------------- + + +def _throttle(max_attempts: int = 3, window_seconds: int = 900, client_ip: str = "1.2.3.4", cache=None, redis_cache=None): + """A throttle over a real in-memory store, so the tests exercise the true counters.""" + from litellm.caching.dual_cache import DualCache + from litellm.proxy.auth.login_throttle import LoginThrottle + + return LoginThrottle( + client_ip=client_ip, + max_attempts=max_attempts, + window_seconds=window_seconds, + cache=cache if cache is not None else DualCache(), + redis_cache=redis_cache, + ) + + +async def _guess(throttle, username: str = "admin", password: str = "wrong"): + from litellm.proxy.auth.login_utils import authenticate_user + + return await authenticate_user( + username=username, + password=password, + master_key="sk-master", + prisma_client=None, + throttle=throttle, + ) + + +@pytest.mark.asyncio +async def test_attempts_are_refused_once_the_limit_is_reached(monkeypatch): + """The limit denies further attempts for the window, and the denial carries Retry-After.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=3, window_seconds=77) + + for _ in range(3): + with pytest.raises(ProxyException) as first: + await _guess(throttle) + assert first.value.code == "401" + + with pytest.raises(ProxyException) as blocked: + await _guess(throttle) + assert blocked.value.code == "429" + assert blocked.value.headers.get("Retry-After") == "77" + + +@pytest.mark.asyncio +async def test_a_correct_password_is_refused_while_blocked(monkeypatch): + """The check precedes the credential comparison, so being over the limit wins.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=2) + + for _ in range(2): + with pytest.raises(ProxyException): + await _guess(throttle) + + with pytest.raises(ProxyException) as blocked: + await _guess(throttle, password="right") + assert blocked.value.code == "429" + + +@pytest.mark.asyncio +async def test_a_blocked_attempt_does_not_extend_the_window(monkeypatch): + """Hammering while blocked must not push the counter or refresh its TTL.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=2) + key = throttle._key("admin") + + for _ in range(2): + with pytest.raises(ProxyException): + await _guess(throttle) + counted_at_limit = await throttle._failures(key) + + for _ in range(5): + with pytest.raises(ProxyException): + await _guess(throttle) + + assert await throttle._failures(key) == counted_at_limit == 2 + + +@pytest.mark.asyncio +async def test_a_successful_sign_in_clears_the_bucket(monkeypatch): + """Success resets the budget rather than leaving the operator near the limit.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + monkeypatch.setenv("DATABASE_URL", "postgresql://stub") + throttle = _throttle(max_attempts=3) + + for _ in range(2): + with pytest.raises(ProxyException): + await _guess(throttle) + + with patch("litellm.proxy.auth.login_utils.user_update", new=AsyncMock()), patch( + "litellm.proxy.auth.login_utils.generate_key_helper_fn", new=AsyncMock(return_value={"token": "sk-ui"}) + ): + await _guess(throttle, password="right") + + assert await throttle._failures(throttle._key("admin")) == 0 + + +@pytest.mark.asyncio +async def test_a_configuration_error_never_counts(monkeypatch): + """A 500 from an unset master key is not a guess and must not consume the budget.""" + from litellm.proxy._types import ProxyException + + throttle = _throttle(max_attempts=2) + for _ in range(5): + with pytest.raises(ProxyException) as exc: + await authenticate_user( + username="admin", password="x", master_key=None, prisma_client=None, throttle=throttle + ) + assert exc.value.code == "500" + + assert await throttle._failures(throttle._key("admin")) == 0 + + +@pytest.mark.asyncio +async def test_the_username_is_case_folded_into_one_bucket(monkeypatch): + """The DB lookup is case-insensitive, so casing must not multiply the budget.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=4) + + for name in ("admin@corp.com", "ADMIN@corp.com", "Admin@corp.com", "aDmIn@corp.com"): + with pytest.raises(ProxyException) as exc: + await _guess(throttle, username=name) + assert exc.value.code == "401" + + with pytest.raises(ProxyException) as blocked: + await _guess(throttle, username="admin@CORP.com") + assert blocked.value.code == "429" + + +@pytest.mark.asyncio +async def test_a_different_username_from_the_same_source_is_unaffected(monkeypatch): + """The bucket is the pair, so one username's failures do not block another.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=2) + + for _ in range(3): + with pytest.raises(ProxyException): + await _guess(throttle, username="admin") + + with pytest.raises(ProxyException) as other: + await _guess(throttle, username="someone-else@example.com") + assert other.value.code == "401", "a second username must still reach the credential check" + + +@pytest.mark.asyncio +async def test_both_credential_rejections_are_indistinguishable(monkeypatch): + """One message for the known and the unknown username, so responses do not enumerate.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + + with pytest.raises(ProxyException) as unknown: + await _guess(_throttle(max_attempts=99), username="nobody@example.com") + + fake_user = MagicMock() + fake_user.user_id = "u-1" + fake_user.user_email = "known@example.com" + fake_user.user_role = "internal_user" + fake_user.password = "scrypt:fake" + repo = MagicMock() + repo.return_value.table.find_first = AsyncMock(return_value=fake_user) + with patch("litellm.proxy.auth.login_utils.UserRepository", repo), patch( + "litellm.proxy.auth.login_utils.verify_password", return_value=False + ): + with pytest.raises(ProxyException) as known: + await authenticate_user( + username="known@example.com", + password="wrong", + master_key="sk-master", + prisma_client=MagicMock(), + throttle=_throttle(max_attempts=99), + ) + + assert unknown.value.message == known.value.message + assert "known@example.com" not in unknown.value.message + known.value.message + + +@pytest.mark.asyncio +async def test_a_user_with_no_password_set_does_not_consume_the_budget(monkeypatch): + """That 401 is deterministic and guards no secret, so counting it would only let + someone burn a passwordless account's bucket.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=2) + + passwordless = MagicMock() + passwordless.user_id = "u-2" + passwordless.user_email = "nopass@example.com" + passwordless.user_role = "internal_user" + passwordless.password = None + repo = MagicMock() + repo.return_value.table.find_first = AsyncMock(return_value=passwordless) + + with patch("litellm.proxy.auth.login_utils.UserRepository", repo): + for _ in range(5): + with pytest.raises(ProxyException) as exc: + await authenticate_user( + username="nopass@example.com", + password="x", + master_key="sk-master", + prisma_client=MagicMock(), + throttle=throttle, + ) + assert exc.value.code == "401" + + assert await throttle._failures(throttle._key("nopass@example.com")) == 0 + + +@pytest.mark.asyncio +async def test_a_wrong_password_for_a_known_user_also_counts(monkeypatch): + """The database-user branch must charge the bucket too, not just the unknown-user branch.""" + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=3) + + known = MagicMock() + known.user_id = "u-1" + known.user_email = "known@example.com" + known.user_role = "internal_user" + known.password = "scrypt:stored" + repo = MagicMock() + repo.return_value.table.find_first = AsyncMock(return_value=known) + + async def _attempt(): + return await authenticate_user( + username="known@example.com", + password="wrong", + master_key="sk-master", + prisma_client=MagicMock(), + throttle=throttle, + ) + + with patch("litellm.proxy.auth.login_utils.UserRepository", repo), patch( + "litellm.proxy.auth.login_utils.verify_password", return_value=False + ): + for _ in range(3): + with pytest.raises(ProxyException) as rejected: + await _attempt() + assert rejected.value.code == "401" + + with pytest.raises(ProxyException) as blocked: + await _attempt() + assert blocked.value.code == "429" + + +@pytest.mark.asyncio +async def test_two_source_addresses_do_not_share_a_bucket(monkeypatch): + """The key is the pair, so one address exhausting its budget must not block another. + + Dropping the address from the key would turn this into the username-only counter the + design rejects, where anyone can lock a named admin out from anywhere. + """ + from litellm.caching.dual_cache import DualCache + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + shared_store = DualCache() + attacker = _throttle(max_attempts=2, client_ip="203.0.113.9", cache=shared_store) + operator = _throttle(max_attempts=2, client_ip="198.51.100.7", cache=shared_store) + + for _ in range(3): + with pytest.raises(ProxyException): + await _guess(attacker, username="admin") + + with pytest.raises(ProxyException) as blocked: + await _guess(attacker, username="admin") + assert blocked.value.code == "429" + + with pytest.raises(ProxyException) as unaffected: + await _guess(operator, username="admin") + assert unaffected.value.code == "401", "the real operator must still reach the credential check" + + +class _NoExpiryRedis: + """Redis that stores the counter but never records an expiry for it. + + Models the window between INCRBYFLOAT committing and the TTL call failing. + """ + + def __init__(self): + self.values: dict = {} + self.expiry_repairs = 0 + + async def async_get_cache(self, key, **kwargs): + return self.values.get(key) + + async def async_increment(self, key, value, ttl=None, **kwargs): + if int(value) == 0: + self.expiry_repairs += 1 + self.values[key] = self.values.get(key, 0) + int(value) + return self.values[key] + + async def async_get_ttl(self, key): + return None + + async def async_delete_cache(self, key): + self.values.pop(key, None) + + +@pytest.mark.asyncio +async def test_a_counter_left_without_an_expiry_is_repaired(monkeypatch): + """Regression: a counter with no TTL would refuse the pair forever. + + Redis commits the increment before setting the expiry, and nothing increments the key + again once the limit is reached, so a TTL that never landed is never repaired on its + own and the username and source pair stays refused with no way back. + """ + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + redis = _NoExpiryRedis() + throttle = _throttle(max_attempts=2, redis_cache=redis) + + for _ in range(2): + with pytest.raises(ProxyException): + await _guess(throttle) + + assert redis.expiry_repairs >= 1, "each recorded failure must leave the counter with an expiry" + + repairs_before_block = redis.expiry_repairs + with pytest.raises(ProxyException) as blocked: + await _guess(throttle) + assert blocked.value.code == "429" + assert redis.expiry_repairs > repairs_before_block, "the refusal path must repair a missing expiry too" + + +@pytest.mark.asyncio +async def test_counters_do_not_share_the_key_authentication_cache(monkeypatch): + """Regression: throttle entries must not evict cached credentials. + + user_api_key_cache holds at most 200 in-memory entries and evicts the soonest to + expire first, so parking 900s sign-in counters there let a stream of made-up usernames + push out the much shorter lived credential entries, sending every ordinary API request + back to the database. + """ + from litellm.proxy import proxy_server as ps + from litellm.proxy.auth.login_throttle import _CACHE_KEY_PREFIX, LoginThrottle + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + monkeypatch.setattr(ps, "redis_usage_cache", None) + + auth_cache_keys_before = set(ps.user_api_key_cache.in_memory_cache.cache_dict) + + request = MagicMock() + request.headers = {} + request.client = MagicMock() + request.client.host = "1.2.3.4" + throttle = LoginThrottle.from_request(request) + + for i in range(25): + with pytest.raises(Exception): + await _guess(throttle, username=f"made-up-{i}@example.com") + + added = set(ps.user_api_key_cache.in_memory_cache.cache_dict) - auth_cache_keys_before + assert not [k for k in added if str(k).startswith(_CACHE_KEY_PREFIX)], ( + "sign-in counters must live in their own cache, not the key-authentication cache" + ) + + +@pytest.mark.asyncio +async def test_a_refused_username_cannot_forge_log_lines(monkeypatch): + """The username reaches a warning log, so it must not carry newlines or control bytes.""" + import logging + + from litellm._logging import verbose_proxy_logger + from litellm.proxy._types import ProxyException + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + throttle = _throttle(max_attempts=1) + forged = "victim@example.com\nWARNING: sign-in succeeded for attacker\x00" + + with pytest.raises(ProxyException): + await _guess(throttle, username=forged) + + records: list[logging.LogRecord] = [] + handler = logging.Handler() + handler.emit = records.append + verbose_proxy_logger.addHandler(handler) + try: + with pytest.raises(ProxyException) as blocked: + await _guess(throttle, username=forged) + finally: + verbose_proxy_logger.removeHandler(handler) + + assert blocked.value.code == "429" + emitted = [r.getMessage() for r in records if "sign-in attempts exhausted" in r.getMessage()] + assert emitted, "the refusal must be logged" + assert "\n" not in emitted[0] and "\x00" not in emitted[0] + assert "victim@example.com" in emitted[0] + + +@pytest.mark.asyncio +async def test_a_username_spray_cannot_evict_an_existing_counter(monkeypatch): + """Regression: the in-memory tier must hold more counters than a spray can create. + + The default in-memory cache keeps 200 entries and evicts the soonest to expire, and + every counter shares one window, so eviction was effectively oldest-first. A few + hundred made-up usernames therefore pushed out the attacker's own counter and handed + back a fresh allowance against the real account. + """ + from litellm.proxy._types import ProxyException + from litellm.proxy.auth.login_throttle import _FAILED_LOGIN_CACHE, _MAX_TRACKED_LOGIN_SOURCES + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right") + assert _MAX_TRACKED_LOGIN_SOURCES >= 10_000 + assert _FAILED_LOGIN_CACHE.in_memory_cache.max_size_in_memory == _MAX_TRACKED_LOGIN_SOURCES + + throttle = _throttle(max_attempts=3, cache=_FAILED_LOGIN_CACHE, client_ip="10.9.9.9") + victim = "spray-victim@corp.com" + for _ in range(3): + with pytest.raises(ProxyException): + await _guess(throttle, username=victim) + + for i in range(500): + await throttle.record_failure(f"spray-filler-{i}@corp.com") + + assert await throttle._failures(throttle._key(victim)) == 3, "the counter must survive a spray" + with pytest.raises(ProxyException) as blocked: + await _guess(throttle, username=victim) + assert blocked.value.code == "429" diff --git a/tests/test_litellm/proxy/proxy_server/conftest.py b/tests/test_litellm/proxy/proxy_server/conftest.py index c545965f9a9..22f2e5b3feb 100644 --- a/tests/test_litellm/proxy/proxy_server/conftest.py +++ b/tests/test_litellm/proxy/proxy_server/conftest.py @@ -511,3 +511,35 @@ def make_key( max_budget=max_budget, **kwargs, ) + + +@pytest.fixture(autouse=True) +def reset_login_throttle(monkeypatch): + """Clear the Admin UI failed-login counters between tests. + + `client` is session scoped and the counters live in the shared `user_api_key_cache` + with a 900s window, so without this any test that fails a sign-in enough times would + start returning 429 from unrelated tests later in the same process. Only the throttle's + own keys are removed, so nothing else in that cache is disturbed. + """ + from litellm.proxy import proxy_server as ps + from litellm.proxy.auth.login_throttle import _FAILED_LOGIN_CACHE, _CACHE_KEY_PREFIX + + def _drop_throttle_keys() -> None: + in_memory = getattr(_FAILED_LOGIN_CACHE, "in_memory_cache", None) + if in_memory is None: + return + tracked = tuple( + key + for store in (getattr(in_memory, "cache_dict", None), getattr(in_memory, "ttl_dict", None)) + if isinstance(store, dict) + for key in tuple(store) + if str(key).startswith(_CACHE_KEY_PREFIX) + ) + for key in tracked: + in_memory.delete_cache(key) + + monkeypatch.setattr(ps, "redis_usage_cache", None) + _drop_throttle_keys() + yield _drop_throttle_keys + _drop_throttle_keys() diff --git a/tests/test_litellm/proxy/proxy_server/test_routes_login_sso.py b/tests/test_litellm/proxy/proxy_server/test_routes_login_sso.py index af37dbe85fe..faeb7750e03 100644 --- a/tests/test_litellm/proxy/proxy_server/test_routes_login_sso.py +++ b/tests/test_litellm/proxy/proxy_server/test_routes_login_sso.py @@ -10,6 +10,7 @@ Routes covered: from __future__ import annotations +from concurrent.futures import ThreadPoolExecutor from unittest.mock import AsyncMock, MagicMock import pytest @@ -29,7 +30,7 @@ def _install_login_mocks(monkeypatch, raise_on_auth: bool = False) -> None: """ from litellm.proxy import proxy_server as ps - async def _fake_auth(username, password, master_key, prisma_client): + async def _fake_auth(username, password, master_key, prisma_client, throttle=None): if raise_on_auth: raise Exception("boom-auth-failure") fake = MagicMock() @@ -460,3 +461,92 @@ def test_login_form_ignores_open_redirect_return_to(client, monkeypatch): location = response.headers.get("location", "") assert "evil.example.com" not in location assert "/ui" in location # dashboard fallback + + +# --------------------------------------------------------------------------- +# Failed-login accounting across the login routes (LIT-5285) +# --------------------------------------------------------------------------- + + +def _install_real_auth(monkeypatch, **settings): + """Run the real authenticate_user so the throttle inside it is exercised. + + prisma_client stays None, so every guess falls through to the credential rejection. + """ + from litellm.proxy import proxy_server as ps + + monkeypatch.setenv("UI_USERNAME", "admin") + monkeypatch.setenv("UI_PASSWORD", "right-password") + monkeypatch.setattr(ps, "master_key", "sk-test-master") + monkeypatch.setattr(ps, "prisma_client", None) + monkeypatch.setattr(ps, "premium_user", False) + monkeypatch.setattr(ps, "general_settings", dict(settings)) + + +def _form_login(client, username="admin", password="wrong"): + return client.post( + "/login", data={"username": username, "password": password}, follow_redirects=False + ).status_code + + +def _json_login(client, path, username="admin", password="wrong"): + return client.post(path, json={"username": username, "password": password}).status_code + + +def test_budget_is_shared_across_every_login_endpoint(client, monkeypatch, reset_login_throttle): + """The endpoint is not part of the key, so spending the budget on one route blocks the rest. + + Partitioning the counter per endpoint would silently triple the real allowance. + """ + _install_real_auth( + monkeypatch, + max_failed_login_attempts=10, + control_plane_url="https://cp.example.com", + ) + + assert [_form_login(client) for _ in range(5)] == [401] * 5 + assert [_json_login(client, "/v2/login") for _ in range(5)] == [401] * 5 + + assert _json_login(client, "/v3/login") == 429, "the eleventh attempt must be refused on a third route" + + +def test_budget_is_shared_across_username_casing(client, monkeypatch, reset_login_throttle): + """The database lookup is case-insensitive, so casing must not partition the counter.""" + _install_real_auth(monkeypatch, max_failed_login_attempts=10) + + assert [_json_login(client, "/v2/login", username="admin@corp.com") for _ in range(5)] == [401] * 5 + assert [_json_login(client, "/v2/login", username="ADMIN@corp.com") for _ in range(5)] == [401] * 5 + + assert _json_login(client, "/v2/login", username="Admin@corp.com") == 429 + + +def test_a_refused_attempt_carries_retry_after(client, monkeypatch, reset_login_throttle): + """The 429 tells the caller how long the window has left.""" + _install_real_auth(monkeypatch, max_failed_login_attempts=2, failed_login_window_seconds=77) + + assert [_json_login(client, "/v2/login") for _ in range(2)] == [401, 401] + + refused = client.post("/v2/login", json={"username": "admin", "password": "wrong"}) + assert refused.status_code == 429 + assert refused.headers.get("retry-after") == "77" + + +def test_a_second_username_from_the_same_source_still_gets_through(client, monkeypatch, reset_login_throttle): + """The bucket is the username and source pair, so one account cannot block another.""" + _install_real_auth(monkeypatch, max_failed_login_attempts=2) + + for _ in range(3): + _json_login(client, "/v2/login", username="admin") + + assert _json_login(client, "/v2/login", username="someone-else@example.com") == 401 + + +def test_sign_in_succeeds_again_once_the_budget_is_restored(client, monkeypatch, reset_login_throttle): + """A cleared bucket lets the same username straight back in.""" + _install_real_auth(monkeypatch, max_failed_login_attempts=2) + + assert [_json_login(client, "/v2/login") for _ in range(2)] == [401, 401] + assert _json_login(client, "/v2/login") == 429 + + reset_login_throttle() + assert _json_login(client, "/v2/login") == 401 diff --git a/tests/test_litellm/proxy/test_proxy_server.py b/tests/test_litellm/proxy/test_proxy_server.py index f51648faf80..ffe40339ad7 100644 --- a/tests/test_litellm/proxy/test_proxy_server.py +++ b/tests/test_litellm/proxy/test_proxy_server.py @@ -19,7 +19,6 @@ from fastapi import FastAPI from fastapi.staticfiles import StaticFiles from fastapi.testclient import TestClient - import litellm import litellm.proxy.proxy_server as proxy_server_module from litellm.caching.caching import RedisCache @@ -27,6 +26,7 @@ from litellm.caching.redis_cluster_cache import RedisClusterCache from litellm.litellm_core_utils.get_model_cost_map import ModelCostMapReloaded from litellm.caching.dual_cache import DualCache from litellm.proxy._types import LitellmUserRoles, UserAPIKeyAuth +from litellm.proxy.auth.login_throttle import LoginThrottle from litellm.proxy.auth.user_api_key_auth import user_api_key_auth from litellm.proxy.proxy_server import app, initialize from litellm.utils import _invalidate_model_cost_lowercase_map @@ -124,12 +124,13 @@ def test_login_v2_returns_redirect_url_and_sets_cookie(monkeypatch): } assert response.cookies.get("token") == "signed-token" - mock_authenticate_user.assert_awaited_once_with( - username="alice", - password="secret", - master_key="test-master-key", - prisma_client=mock_prisma_client, - ) + mock_authenticate_user.assert_awaited_once() + auth_kwargs = mock_authenticate_user.call_args.kwargs + assert auth_kwargs["username"] == "alice" + assert auth_kwargs["password"] == "secret" + assert auth_kwargs["master_key"] == "test-master-key" + assert auth_kwargs["prisma_client"] is mock_prisma_client + assert isinstance(auth_kwargs["throttle"], LoginThrottle), "the endpoint must thread a throttle through" mock_create_ui_token_object.assert_called_once_with( login_result=mock_login_result, general_settings={}, @@ -11712,3 +11713,27 @@ async def test_authoritative_floor_spend_keeps_a_reset_marker_written_during_the assert real_spend_counter_cache.in_memory_cache.get_cache(key=marker_key) == 0.0, ( "the in-flight DB read clobbered the post-reset floor marker with the stale pre-reset value" ) + + +@pytest.mark.asyncio +async def test_login_throttle_settings_are_not_overridable_from_the_database(): + """LIT-5285: the sign-in limits stay config.yaml only. + + _update_general_settings copies an allowlist of keys out of the DB row. Adding these + to it would let a stored value outrank config.yaml, so an operator refused by a bad + value could not fix it by editing YAML and restarting. + """ + import litellm.proxy.proxy_server as ps + from litellm.proxy.proxy_server import ProxyConfig + + original = dict(ps.general_settings) + try: + ps.general_settings.clear() + await ProxyConfig()._update_general_settings( + db_general_settings={"max_failed_login_attempts": 999, "failed_login_window_seconds": 1} + ) + assert "max_failed_login_attempts" not in ps.general_settings + assert "failed_login_window_seconds" not in ps.general_settings + finally: + ps.general_settings.clear() + ps.general_settings.update(original) diff --git a/ui/litellm-dashboard/src/lib/http/schema.d.ts b/ui/litellm-dashboard/src/lib/http/schema.d.ts index 9ac49fa96e1..4cc8f3db229 100644 --- a/ui/litellm-dashboard/src/lib/http/schema.d.ts +++ b/ui/litellm-dashboard/src/lib/http/schema.d.ts @@ -24967,6 +24967,11 @@ export interface components { * @default false */ enable_public_model_hub: boolean; + /** + * Failed Login Window Seconds + * @description Fixed window in seconds over which failed Admin UI sign-in attempts are counted. The window starts at the first failure and is not extended by later ones. Configurable from config.yaml only. Defaults to 900 + */ + failed_login_window_seconds?: number | null; /** * Forward Client Headers To Llm Api * @description If True, forwards client headers (e.g. Authorization) to the LLM API. Required for Claude Code with Max subscription. @@ -25011,6 +25016,11 @@ export interface components { * @description max batch input file size in MB for /v1/files uploads with purpose=batch, if a file is larger than this size it will be rejected before being forwarded to the provider */ max_batch_file_size_mb?: number | null; + /** + * Max Failed Login Attempts + * @description Number of failed Admin UI sign-in attempts allowed for one username from one source address within `failed_login_window_seconds`, before further attempts are refused with 429. Configurable from config.yaml only. Defaults to 10 + */ + max_failed_login_attempts?: number | null; /** * Max Parallel Requests * @description maximum parallel requests for each api key