From f31d4cb7a2e90b337f60ef06a3d31c0be9ad667c Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 31 Jul 2019 15:52:27 +0100 Subject: Don't allow clients to send tombstones that reference the same room --- synapse/events/validator.py | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'synapse/events/validator.py') diff --git a/synapse/events/validator.py b/synapse/events/validator.py index f7ffd1d561..29f99361c0 100644 --- a/synapse/events/validator.py +++ b/synapse/events/validator.py @@ -106,6 +106,13 @@ class EventValidator(object): if event.content["membership"] not in Membership.LIST: raise SynapseError(400, "Invalid membership key") + elif event.type == EventTypes.Tombstone: + if "replacement_room" not in event.content: + raise SynapseError(400, "Content has no replacement_room key") + + if event.content["replacement_room"] == event.room_id: + raise SynapseError(400, "Tombstone cannot reference itself") + def _ensure_strings(self, d, keys): for s in keys: if s not in d: -- cgit 1.5.1 From dc4d74e44adbd8fc79bbaa7ac44b430a11454173 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 31 Jul 2019 16:36:20 +0100 Subject: Validate well-known state events are state events. Lets disallow sending things like memberships, topics etc as non-state events. --- synapse/events/validator.py | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'synapse/events/validator.py') diff --git a/synapse/events/validator.py b/synapse/events/validator.py index 29f99361c0..0cf2b9ba42 100644 --- a/synapse/events/validator.py +++ b/synapse/events/validator.py @@ -95,10 +95,10 @@ class EventValidator(object): elif event.type == EventTypes.Topic: self._ensure_strings(event.content, ["topic"]) - + self._ensure_state_event(event) elif event.type == EventTypes.Name: self._ensure_strings(event.content, ["name"]) - + self._ensure_state_event(event) elif event.type == EventTypes.Member: if "membership" not in event.content: raise SynapseError(400, "Content has not membership key") @@ -106,6 +106,7 @@ class EventValidator(object): if event.content["membership"] not in Membership.LIST: raise SynapseError(400, "Invalid membership key") + self._ensure_state_event(event) elif event.type == EventTypes.Tombstone: if "replacement_room" not in event.content: raise SynapseError(400, "Content has no replacement_room key") @@ -113,9 +114,15 @@ class EventValidator(object): if event.content["replacement_room"] == event.room_id: raise SynapseError(400, "Tombstone cannot reference itself") + self._ensure_state_event(event) + def _ensure_strings(self, d, keys): for s in keys: if s not in d: raise SynapseError(400, "'%s' not in content" % (s,)) if not isinstance(d[s], string_types): raise SynapseError(400, "'%s' not a string type" % (s,)) + + def _ensure_state_event(self, event): + if not event.is_state(): + raise SynapseError(400, "'%s' must be state events" % (event.type,)) -- cgit 1.5.1 From 76a58fdcced5d152efee48f69b6ab658e0e6cbc5 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Thu, 1 Aug 2019 13:14:25 +0100 Subject: Fix spelling. Co-Authored-By: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com> --- changelog.d/5801.misc | 2 +- synapse/events/validator.py | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-) (limited to 'synapse/events/validator.py') diff --git a/changelog.d/5801.misc b/changelog.d/5801.misc index e6ecb475d9..e19854de82 100644 --- a/changelog.d/5801.misc +++ b/changelog.d/5801.misc @@ -1 +1 @@ -Don't allow clients to send tombstone events that reference the room its sent in. +Don't allow clients to send tombstone events that reference the room it's sent in. diff --git a/synapse/events/validator.py b/synapse/events/validator.py index 29f99361c0..6374dd067d 100644 --- a/synapse/events/validator.py +++ b/synapse/events/validator.py @@ -111,7 +111,9 @@ class EventValidator(object): raise SynapseError(400, "Content has no replacement_room key") if event.content["replacement_room"] == event.room_id: - raise SynapseError(400, "Tombstone cannot reference itself") + raise SynapseError( + 400, "Tombstone cannot reference the room it was sent in" + ) def _ensure_strings(self, d, keys): for s in keys: -- cgit 1.5.1