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FreeBSD : Matrix clients -- several vulnerabilities (93eb0e48-14ba-11ec-875e-901b0e9408dc)

medium Nessus Plugin ID 153285

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Synopsis

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

Description

Matrix developers report :

Today we are disclosing a critical security issue affecting multiple Matrix clients and libraries including Element (Web/Desktop/Android), FluffyChat, Nheko, Cinny, and SchildiChat.

Specifically, in certain circumstances it may be possible to trick vulnerable clients into disclosing encryption keys for messages previously sent by that client to user accounts later compromised by an attacker.

Exploiting this vulnerability to read encrypted messages requires gaining control over the recipient's account. This requires either compromising their credentials directly or compromising their homeserver.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?ccdf7f71

http://www.nessus.org/u?10fab9a2

Plugin Details

Severity: Medium

ID: 153285

File Name: freebsd_pkg_93eb0e4814ba11ec875e901b0e9408dc.nasl

Version: 1.3

Type: local

Published: 9/14/2021

Updated: 9/28/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2021-40824

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:cinny, p-cpe:/a:freebsd:freebsd:element-web, p-cpe:/a:freebsd:freebsd:nheko, 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: 9/13/2021

Vulnerability Publication Date: 8/23/2021

Reference Information

CVE: CVE-2021-40823, CVE-2021-40824