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community/synapse: security upgrade to 1.105.1

fossdd requested to merge fossdd/aports:synapse-1.105.0-r0 into master

In 1.105.1:

Weakness in auth chain indexing allows DoS from remote room members through disk fill and high CPU usage.

A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.104.1, can dispatch specially crafted events to exploit a weakness in how the auth chain cover index is calculated. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service.

Servers in private federations, or those that do not federate, are not affected.

Edited by fossdd

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