FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

py-matrix-synapse -- DoS on Federation API

Affected packages
py36-matrix-synapse < 1.23.1
py37-matrix-synapse < 1.23.1
py38-matrix-synapse < 1.23.1
py39-matrix-synapse < 1.23.1


VuXML ID cfa0be42-3cd7-11eb-9de7-641c67a117d8
Discovery 2020-12-09
Entry 2020-12-13

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.


CVE Name CVE-2020-26257
FreeBSD PR ports/251768