Make sure that is_verified is a boolean when processing room keys

changelog.d/7045.misc

@@ -0,0 +1 @@
+Add a type check to `is_verified` when processing room keys.

synapse/handlers/e2e_room_keys.py

@@ -207,6 +207,13 @@ def upload_room_keys(self, user_id, version, room_keys):
  changed = False # if anything has changed, we need to update the etag
  for room_id, room in iteritems(room_keys["rooms"]):
  for session_id, room_key in iteritems(room["sessions"]):
+ if not isinstance(room_key["is_verified"], bool):
+ msg = (
+ "is_verified must be a boolean in keys for session %s in"
+ "room %s" % (session_id, room_id)
+ )
+ raise SynapseError(400, msg, Codes.INVALID_PARAM)
+
  log_kv(
  {
  "message": "Trying to upload room key",