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FreeBSD : py-matrix-synapse -- malicious push rules may be used for a denial of service attack. (278561d7-b261-11eb-b788-901b0e934d69)

medium Nessus Plugin ID 149424

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Synopsis

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

Description

Matrix developers report :

'Push rules' can specify conditions under which they will match, including event_match, which matches event content against a pattern including wildcards. Certain patterns can cause very poor performance in the matching engine, leading to a denial-of-service when processing moderate length events.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?1f08e9a3

http://www.nessus.org/u?d92c9471

Plugin Details

Severity: Medium

ID: 149424

File Name: freebsd_pkg_278561d7b26111ebb788901b0e934d69.nasl

Version: 1.3

Type: local

Published: 5/12/2021

Updated: 5/27/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-29471

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:py36-matrix-synapse, p-cpe:/a:freebsd:freebsd:py37-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: 5/11/2021

Vulnerability Publication Date: 5/11/2021

Reference Information

CVE: CVE-2021-29471