Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. 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. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.

The remote Fedora 40 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2024-3ff83cb806 advisory.

    Update matrix-synapse to v1.105.1 (CVE-2024-31208)

    ----

    Update to v1.105.0

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 38 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2024-7be0693731 advisory.

    Update matrix-synapse to v1.105.1 (CVE-2024-31208)

    ----

    Update to v1.105.0

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 39 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2024-d408b654d6 advisory.

    Update matrix-synapse to v1.105.1 (CVE-2024-31208)

    ----

    Update to v1.105.0

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the bdfa6c04-027a-11ef-9c21-901b0e9408dc advisory.

  - Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room     with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the     V2 state resolution algorithm. 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. Server administrators should upgrade to 1.105.1 or later. Some     workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or     leave the room and purge the room using the admin API. (CVE-2024-31208)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
194934	Fedora 40 : matrix-synapse / rust-pythonize (2024-3ff83cb806)	Nessus	Fedora Local Security Checks	medium
194932	Fedora 38 : matrix-synapse / rust-pythonize (2024-7be0693731)	Nessus	Fedora Local Security Checks	medium
194930	Fedora 39 : matrix-synapse / rust-pythonize (2024-d408b654d6)	Nessus	Fedora Local Security Checks	medium
193887	FreeBSD : py-matrix-synapse -- weakness in auth chain indexing allows DoS (bdfa6c04-027a-11ef-9c21-901b0e9408dc)	Nessus	FreeBSD Local Security Checks	medium

Detections

Analytics

CVE-2024-31208

medium

Tenable Plugins

medium

medium

medium

medium