Mozilla Firefox ESR < 68.6.1

high Nessus Plugin ID 135199

Synopsis

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

Description

The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 68.6.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-11 advisory.

- Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free.
We are aware of targeted attacks in the wild abusing this flaw. (CVE-2020-6819)

- Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after- free. We are aware of targeted attacks in the wild abusing this flaw. (CVE-2020-6820)

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

Solution

Upgrade to Mozilla Firefox ESR version 68.6.1 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2020-11/

Plugin Details

Severity: High

ID: 135199

File Name: macos_firefox_68_6_1_esr.nasl

Version: 1.8

Type: local

Agent: macosx

Published: 4/6/2020

Updated: 1/24/2022

Supported Sensors: Nessus Agent

Risk Information

CVSS Score Source: CVE-2020-6820

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

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

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/a:mozilla:firefox_esr

Required KB Items: MacOSX/Firefox/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/3/2020

Vulnerability Publication Date: 4/3/2020

CISA Known Exploited Dates: 5/3/2022

Reference Information

CVE: CVE-2020-6819, CVE-2020-6820

MFSA: 2020-11

IAVA: 2020-A-0128-S