Detections
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Mozilla Firefox ESR < 68.8

critical Nessus Plugin ID 136356

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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 68.8. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-17 advisory.

 - Mozilla developers and community members Alexandru Michis, Jason Kratzer, philipp, Ted Campbell, Bas Schouten, Andr Bargull, and Karl Tomlinson reported memory safety bugs present in Firefox 75 and Firefox ESR 68.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2020-12395)

 - The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape. Note: this issue only affects Firefox on Windows operating systems. (CVE-2020-12388, CVE-2020-12389)

 - A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. (CVE-2020-12387)

 - A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. (CVE-2020-6831)

 - The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in the disclosure of local files. (CVE-2020-12392)

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

Solution

Upgrade to Mozilla Firefox ESR version 68.8 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2020-17/

Plugin Details

Severity: Critical

ID: 136356

File Name: macos_firefox_68_8_esr.nasl

Version: 1.9

Type: local

Agent: macosx

Published: 5/7/2020

Updated: 11/18/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2020-12395

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9

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

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

CVSS Score Source: CVE-2020-12389

Vulnerability Information

CPE: cpe:/a:mozilla:firefox_esr

Required KB Items: installed_sw/Mozilla Firefox ESR

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/5/2020

Vulnerability Publication Date: 5/5/2020

Reference Information

CVE: CVE-2020-12387, CVE-2020-12388, CVE-2020-12389, CVE-2020-12392, CVE-2020-12393, CVE-2020-12395, CVE-2020-6831

IAVA: 2020-A-0190-S

MFSA: 2020-17