Mozilla Thunderbird < 78.14

critical Nessus Plugin ID 153111
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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 78.14. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2021-42 advisory.

- When delegating navigations to the operating system, Thunderbird would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. This bug only affects Thunderbird for Windows. Other operating systems are unaffected. (CVE-2021-38492)

- Mozilla developers Tyson Smith and Gabriele Svelto reported memory safety bugs present in Thunderbird 78.13. 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-2021-38493)

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 78.14 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2021-42/

Plugin Details

Severity: Critical

ID: 153111

File Name: mozilla_thunderbird_78_14.nasl

Version: 1.2

Type: local

Agent: windows

Family: Windows

Published: 9/8/2021

Updated: 9/8/2021

Dependencies: mozilla_org_installed.nasl

Risk Information

CVSS Score Source: CVE-2021-38493

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:thunderbird

Required KB Items: Mozilla/Thunderbird/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/7/2021

Vulnerability Publication Date: 9/7/2021

Reference Information

CVE: CVE-2021-38492, CVE-2021-38493