Mozilla Thunderbird < 91.0.1

high Nessus Plugin ID 152633
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 a vulnerability.

Description

The version of Thunderbird installed on the remote Windows host is prior to 91.0.1. It is, therefore, affected by a vulnerability as referenced in the mfsa2021-37 advisory.

- Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for a header splitting attack against servers using HTTP/3. (CVE-2021-29991)

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 91.0.1 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2021-37/

Plugin Details

Severity: High

ID: 152633

File Name: mozilla_thunderbird_91_0_1.nasl

Version: 1.2

Type: local

Agent: windows

Family: Windows

Published: 8/17/2021

Updated: 8/17/2021

Dependencies: mozilla_org_installed.nasl

Risk Information

CVSS Score Source: CVE-2021-29991

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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: 8/16/2021

Vulnerability Publication Date: 8/16/2021

Reference Information

CVE: CVE-2021-29991