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FreeBSD : py-matrix-synapse -- weakness in auth chain indexing allows DoS (bdfa6c04-027a-11ef-9c21-901b0e9408dc)

medium Nessus Plugin ID 193887

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

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.

Solution

Update the affected packages.

See Also

https://element.io/blog/security-release-synapse-1-105-1/

http://www.nessus.org/u?c06680cc

http://www.nessus.org/u?a49bffda

Plugin Details

Severity: Medium

ID: 193887

File Name: freebsd_pkg_bdfa6c04027a11ef9c21901b0e9408dc.nasl

Version: 1.0

Type: local

Published: 4/25/2024

Updated: 4/25/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2024-31208

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:py310-matrix-synapse, p-cpe:/a:freebsd:freebsd:py311-matrix-synapse, p-cpe:/a:freebsd:freebsd:py38-matrix-synapse, p-cpe:/a:freebsd:freebsd:py39-matrix-synapse, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 4/24/2024

Vulnerability Publication Date: 4/23/2024

Reference Information

CVE: CVE-2024-31208