Mozilla Firefox < 89.0.1

high Nessus Plugin ID 150801


A web browser installed on the remote macOS or Mac OS X host is affected by a vulnerability.


The version of Firefox installed on the remote macOS or Mac OS X host is prior to 89.0.1. It is, therefore, affected by a vulnerability as referenced in the mfsa2021-27 advisory.

- When drawing text onto a canvas with WebRender disabled, an out of bounds read could occur. This bug only affects Firefox on Windows. Other operating systems are unaffected. (CVE-2021-29968)

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


Upgrade to Mozilla Firefox version 89.0.1 or later.

See Also

Plugin Details

Severity: High

ID: 150801

File Name: macos_firefox_89_0_1.nasl

Version: 1.5

Type: local

Agent: macosx

Published: 6/16/2021

Updated: 7/16/2021

Supported Sensors: Nessus Agent

Risk Information

CVSS Score Source: CVE-2021-29968


Risk Factor: Medium

Score: 6


Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/a:mozilla:firefox

Required KB Items: MacOSX/Firefox/Installed

Exploit Ease: No known exploits are available

Patch Publication Date: 6/16/2021

Vulnerability Publication Date: 6/16/2021

Reference Information

CVE: CVE-2021-29968

IAVA: 2021-A-0292-S