Mozilla Thunderbird < 68.4.1

high Nessus Plugin ID 132774

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Synopsis

A mail client installed on the remote Windows host is affected by multiple vulnerabilities.

Description

The version of Thunderbird installed on the remote Windows host is prior to 68.4.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-04 advisory.

- Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. (CVE-2019-17026)

- During the initialization of a new content process, a pointer offset can be manipulated leading to memory corruption and a potentially exploitable crash in the parent process. Note: this issue only occurs on Windows. Other operating systems are unaffected. (CVE-2019-17015)

- When pasting a <code><style></code> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. (CVE-2019-17016)

- Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code.
(CVE-2019-17017)

- During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. Note: this issue only occurs on Windows.
Other operating systems are unaffected. (CVE-2019-17021)

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 68.4.1 or later.

Plugin Details

Severity: High

ID: 132774

File Name: mozilla_thunderbird_68_4_1.nasl

Version: 1.9

Type: local

Agent: windows

Family: Windows

Published: 1/10/2020

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: 8.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

CVSS Score Source: CVE-2019-17026

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.4

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:H/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: 1/10/2020

Vulnerability Publication Date: 1/8/2020

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

Reference Information

CVE: CVE-2019-17015, CVE-2019-17016, CVE-2019-17017, CVE-2019-17021, CVE-2019-17022, CVE-2019-17024, CVE-2019-17026

MFSA: 2020-04

Detections

Analytics