Mozilla Firefox < 76.0

critical Nessus Plugin ID 136404

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Synopsis

A web browser installed on the remote Windows host is affected by multiple vulnerabilities.

Description

The version of Firefox installed on the remote Windows host is prior to 76.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-16 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)

- Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks (CVE-2020-12390)

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 version 76.0 or later.

Plugin Details

Severity: Critical

ID: 136404

File Name: mozilla_firefox_76_0.nasl

Version: 1.9

Type: local

Agent: windows

Family: Windows

Published: 5/7/2020

Updated: 11/18/2025

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

Required KB Items: installed_sw/Mozilla Firefox

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-2020-12390, CVE-2020-12391, CVE-2020-12392, CVE-2020-12393, CVE-2020-12394, CVE-2020-12395, CVE-2020-12396, CVE-2020-6831

IAVA: 2020-A-0190-S

MFSA: 2020-16

Detections

Analytics