Detections
Analytics

Mozilla Thunderbird < 78.9.1

high Nessus Plugin ID 148396

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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 78.9.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2021-13 advisory.

 - If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. (CVE-2021-23991)

 - Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. An attacker may create a crafted version of an OpenPGP key, by either replacing the original user ID, or by adding another user ID. If Thunderbird imports and accepts the crafted key, the Thunderbird user may falsely conclude that the false user ID belongs to the correspondent. (CVE-2021-23992)

 - An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, causing encryption to fail. (CVE-2021-23993)

 - When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. (CVE-2021-29949)

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 78.9.1 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2021-13/

Plugin Details

Severity: High

ID: 148396

File Name: macos_thunderbird_78_9_1.nasl

Version: 1.8

Type: local

Agent: macosx

Published: 4/9/2021

Updated: 1/5/2024

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.4

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

CVSS Score Source: CVE-2021-29949

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

Vulnerability Information

CPE: cpe:/a:mozilla:thunderbird

Required KB Items: MacOSX/Thunderbird/Installed

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/8/2021

Vulnerability Publication Date: 4/8/2021

Reference Information

CVE: CVE-2021-23991, CVE-2021-23992, CVE-2021-23993, CVE-2021-29949

IAVA: 2021-A-0163-S