From d16c6375fe39deaafd70b151e496f5e15fd7b29c Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Sat, 1 Jun 2019 10:42:33 +0100 Subject: Limit displaynames and avatar URLs These end up in join events everywhere, so let's limit them. Fixes #5079 --- synapse/handlers/profile.py | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'synapse/handlers/profile.py') diff --git a/synapse/handlers/profile.py b/synapse/handlers/profile.py index 91fc718ff8..a5fc6c5dbf 100644 --- a/synapse/handlers/profile.py +++ b/synapse/handlers/profile.py @@ -31,6 +31,9 @@ from ._base import BaseHandler logger = logging.getLogger(__name__) +MAX_DISPLAYNAME_LEN = 100 +MAX_AVATAR_URL_LEN = 1000 + class BaseProfileHandler(BaseHandler): """Handles fetching and updating user profile information. @@ -162,6 +165,11 @@ class BaseProfileHandler(BaseHandler): if not by_admin and target_user != requester.user: raise AuthError(400, "Cannot set another user's displayname") + if len(new_displayname) > MAX_DISPLAYNAME_LEN: + raise SynapseError( + 400, "Displayname is too long (max %i)" % (MAX_DISPLAYNAME_LEN, ), + ) + if new_displayname == '': new_displayname = None @@ -217,6 +225,11 @@ class BaseProfileHandler(BaseHandler): if not by_admin and target_user != requester.user: raise AuthError(400, "Cannot set another user's avatar_url") + if len(new_avatar_url) > MAX_AVATAR_URL_LEN: + raise SynapseError( + 400, "Avatar URL is too long (max %i)" % (MAX_AVATAR_URL_LEN, ), + ) + yield self.store.set_profile_avatar_url( target_user.localpart, new_avatar_url ) -- cgit 1.4.1