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Merge pull request #5802 from matrix-org/erikj/deny_redacting_different_room

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Deny redaction of events in a different room.
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Erik Johnston 2019-08-01 13:14:46 +01:00 committed by GitHub
commit 58af30a6c7
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2 changed files with 4 additions and 1 deletions
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1
changelog.d/5802.misc Normal file
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@ -0,0 +1 @@
Deny redactions of events sent in a different room.

4
synapse/handlers/message.py
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@ -795,7 +795,6 @@ class EventCreationHandler(object):
get_prev_content=False,
allow_rejected=False,
allow_none=True,
check_room_id=event.room_id,
)
# we can make some additional checks now if we have the original event.
@ -803,6 +802,9 @@ class EventCreationHandler(object):
if original_event.type == EventTypes.Create:
raise AuthError(403, "Redacting create events is not permitted")
if original_event.room_id != event.room_id:
raise SynapseError(400, "Cannot redact event from a different room")
prev_state_ids = yield context.get_prev_state_ids(self.store)
auth_events_ids = yield self.auth.compute_auth_events(
event, prev_state_ids, for_verification=True