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VuXML IDDescription
cfa0be42-3cd7-11eb-9de7-641c67a117d8py-matrix-synapse -- DoS on Federation API

Matrix developers reports:

A malicious or poorly-implemented homeserver can inject malformed events into a room by specifying a different room id in the path of a /send_join, /send_leave, /invite or /exchange_third_party_invite request. This can lead to a denial of service in which future events will not be correctly sent to other servers over federation. This affects any server which accepts federation requests from untrusted servers.


Discovery 2020-12-09
Entry 2020-12-13
py36-matrix-synapse
py37-matrix-synapse
py38-matrix-synapse
py39-matrix-synapse
< 1.23.1

CVE-2020-26257
https://github.com/matrix-org/synapse/security/advisories/GHSA-hxmp-pqch-c8mm
ports/251768