Mozilla Thunderbird < 78.5.1

high Nessus Plugin ID 143426

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Synopsis

A mail client installed on the remote Windows host is affected by a vulnerability.

Description

The version of Thunderbird installed on the remote Windows host is prior to 78.5.1. It is, therefore, affected by a vulnerability as referenced in the mfsa2020-53 advisory.

- When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable. (CVE-2020-26970)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Mozilla Thunderbird version 78.5.1 or later.

Plugin Details

Severity: High

ID: 143426

File Name: mozilla_thunderbird_78_5_1.nasl

Version: 1.4

Type: local

Agent: windows

Family: Windows

Published: 12/2/2020

Updated: 11/18/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

CVSS Score Source: CVE-2020-26970

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:thunderbird

Required KB Items: installed_sw/Mozilla Thunderbird

Exploit Ease: No known exploits are available

Patch Publication Date: 12/1/2020

Vulnerability Publication Date: 12/1/2020

Reference Information

CVE: CVE-2020-26970

MFSA: 2020-53

Detections

Analytics