Detections
Analytics

Mozilla Firefox ESR < 68.10

high Nessus Plugin ID 138082

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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 68.10. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-25 advisory.

 - When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. (CVE-2020-12420)

 - Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. Note: this issue only affects Firefox on ARM64 platforms. (CVE-2020-12417)

 - Manipulating individual parts of a URL object could have caused an out-of-bounds read, leaking process memory to malicious JavaScript. (CVE-2020-12418)

 - When processing callbacks that occurred during window flushing in the parent process, the associated window may die; causing a use-after-free condition. This could have led to memory corruption and a potentially exploitable crash. (CVE-2020-12419)

 - When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. (CVE-2020-12421)

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 68.10 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2020-25/

Plugin Details

Severity: High

ID: 138082

File Name: macos_firefox_68_10_esr.nasl

Version: 1.7

Type: local

Agent: macosx

Published: 7/2/2020

Updated: 11/18/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.3

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

CVSS Score Source: CVE-2020-12420

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

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: 6/30/2020

Vulnerability Publication Date: 6/30/2020

Reference Information

CVE: CVE-2020-12417, CVE-2020-12418, CVE-2020-12419, CVE-2020-12420, CVE-2020-12421

IAVA: 2020-A-0287-S

MFSA: 2020-25