Fedora 38 : matrix-synapse (2023-84ee781688)

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-84ee781688 advisory. Update to v1.93.0 CVE-2023-41335, CVE-2023-42453 Tenable has extracted the preceding description block directly from the Fedora security advisory...

Improper Authorization

Synapse is vulnerable to Improper Authorization. The vulnerability is due to a flaw that allowed users to forge read receipts for any event. The attacker can mark any event as read even if he/she was not in the room...

CVE-2023-42453: Improper Authorization

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event if they knew the room ID and event ID. Note that the users were not able to view the events, but simply mark it as read. This could be confusing as...