Detections
Analytics

Mozilla Thunderbird < 68.8.0

critical Nessus Plugin ID 136358

Language:

Synopsis

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

Description

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 68.8.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-18 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)

 - 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)

 - By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. (CVE-2020-12397)

 - 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)

 - 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 Thunderbird version 68.8.0 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2020-18/

Plugin Details

Severity: Critical

ID: 136358

File Name: macos_thunderbird_68_8_0.nasl

Version: 1.8

Type: local

Agent: macosx

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: Medium

Score: 6.7

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: 9.8

Temporal Score: 8.8

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

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

CVSS Score Source: CVE-2020-6831

Vulnerability Information

CPE: cpe:/a:mozilla:thunderbird

Required KB Items: installed_sw/Mozilla Thunderbird

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-2020-12392, CVE-2020-12393, CVE-2020-12395, CVE-2020-12397, CVE-2020-6831

IAVA: 2020-A-0190-S

MFSA: 2020-18