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Discard PDUs from invalid origins due to #1753 in 0.18.[56]
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1 changed files with 23 additions and 1 deletions
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@ -23,6 +23,7 @@ from synapse.util.async import Linearizer
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from synapse.util.logutils import log_function
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from synapse.util.caches.response_cache import ResponseCache
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from synapse.events import FrozenEvent
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from synapse.types import get_domain_from_id
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import synapse.metrics
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from synapse.api.errors import AuthError, FederationError, SynapseError
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@ -132,7 +133,7 @@ class FederationServer(FederationBase):
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if response:
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logger.debug(
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"[%s] We've already responed to this request",
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"[%s] We've already responded to this request",
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transaction.transaction_id
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)
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defer.returnValue(response)
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@ -475,6 +476,27 @@ class FederationServer(FederationBase):
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@defer.inlineCallbacks
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@log_function
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def _handle_new_pdu(self, origin, pdu, get_missing=True):
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# check that it's actually being sent from a valid destination to
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# workaround bug #1753 in 0.18.5 and 0.18.6
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if origin != get_domain_from_id(pdu.event_id):
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if not (
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pdu.type == 'm.room.member' and
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pdu.content and
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pdu.content.get("membership", None) == 'join' and
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self.hs.is_mine_id(pdu.state_key)
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):
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logger.info(
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"Discarding PDU %s from invalid origin %s",
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pdu.event_id, origin
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)
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return
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else:
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logger.info(
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"Accepting join PDU %s from %s",
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pdu.event_id, origin
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)
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# We reprocess pdus when we have seen them only as outliers
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existing = yield self._get_persisted_pdu(
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origin, pdu.event_id, do_auth=False
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