Make sure we reject attempts to invite the notices user

This commit is contained in:
Richard van der Hoff 2018-05-18 11:18:39 +01:00
parent d10707c810
commit 26305788fe
3 changed files with 20 additions and 0 deletions

View File

@ -81,6 +81,7 @@ class FederationHandler(BaseHandler):
self.pusher_pool = hs.get_pusherpool()
self.spam_checker = hs.get_spam_checker()
self.event_creation_handler = hs.get_event_creation_handler()
self._server_notices_mxid = hs.config.server_notices_mxid
# When joining a room we need to queue any events for that room up
self.room_queues = {}
@ -1180,6 +1181,13 @@ class FederationHandler(BaseHandler):
if not self.is_mine_id(event.state_key):
raise SynapseError(400, "The invite event must be for this server")
# block any attempts to invite the server notices mxid
if event.state_key == self._server_notices_mxid:
raise SynapseError(
http_client.FORBIDDEN,
"Cannot invite this user",
)
event.internal_metadata.outlier = True
event.internal_metadata.invite_from_remote = True

View File

@ -309,6 +309,13 @@ class RoomMemberHandler(object):
)
if effective_membership_state == Membership.INVITE:
# block any attempts to invite the server notices mxid
if target.to_string() == self._server_notices_mxid:
raise SynapseError(
http_client.FORBIDDEN,
"Cannot invite this user",
)
block_invite = False
if (self._server_notices_mxid is not None and

View File

@ -78,6 +78,11 @@ class ServerNoticesManager(object):
)
system_mxid = self._config.server_notices_mxid
for room in rooms:
# it's worth noting that there is an asymmetry here in that we
# expect the user to be invited or joined, but the system user must
# be joined. This is kinda deliberate, in that if somebody somehow
# manages to invite the system user to a room, that doesn't make it
# the server notices room.
user_ids = yield self._store.get_users_in_room(room.room_id)
if system_mxid in user_ids:
# we found a room which our user shares with the system notice