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FreeBSD: VID-2327234D-FC4B-11EA-ADEF-641C67A117D8: py-matrix-synapse -- malformed events may prevent users from joining federated rooms

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FreeBSD: VID-2327234D-FC4B-11EA-ADEF-641C67A117D8: py-matrix-synapse -- malformed events may prevent users from joining federated rooms

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/16/2020
Created
09/24/2020
Added
09/22/2020
Modified
09/22/2020

Description

Problem Description:

Affected Synapse versions assume that all events have an "origin" field set. If an event

without the "origin" field is sent into a federated room, servers not already joined to

the room will be unable to do so due to failing to fetch the malformed event.

Impact:

An attacker could cause a denial of service by deliberately sending a malformed event

into a room, thus preventing new servers (and thus their users) from joining the

room.

Solution(s)

  • freebsd-upgrade-package-py36-matrix-synapse
  • freebsd-upgrade-package-py37-matrix-synapse
  • freebsd-upgrade-package-py38-matrix-synapse

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