Detections
Analytics

Mozilla Thunderbird < 68.7.0

critical Nessus Plugin ID 135412

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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 68.7.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-14 advisory.

 - Mozilla developers Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. 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-2020-6825)

 - Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after- free. (CVE-2020-6819)

 - Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free.
 (CVE-2020-6820)

 - When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. (CVE-2020-6821)

 - On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code. (CVE-2020-6822)

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 68.7.0 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/

Plugin Details

Severity: Critical

ID: 135412

File Name: macos_thunderbird_68_7_0.nasl

Version: 1.8

Type: local

Agent: macosx

Published: 4/14/2020

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: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

CVSS Score Source: CVE-2020-6825

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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:F/RL:O/RC:C

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: 4/9/2020

Vulnerability Publication Date: 4/9/2020

CISA Known Exploited Vulnerability Due Dates: 5/3/2022

Reference Information

CVE: CVE-2020-6819, CVE-2020-6820, CVE-2020-6821, CVE-2020-6822, CVE-2020-6825

MFSA: 2020-14