Security Updates for Microsoft Office Products (October 2021)

high Nessus Plugin ID 154038
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

The Microsoft Office Products are affected by multiple vulnerabilities.

Description

The Microsoft Office Products are missing security updates.
It is, therefore, affected by multiple vulnerabilities :

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-40454, CVE-2021-40472)

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-40471, CVE-2021-40473, CVE-2021-40474, CVE-2021-40479, CVE-2021-40480, CVE-2021-40481, CVE-2021-40485, CVE-2021-40486)

Solution

Microsoft has released the following security updates to address this issue:
-KB4018332
-KB5001982
-KB5001985
-KB4461476

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic updates are enabled or open any office app and manually perform an update.

See Also

https://support.microsoft.com/en-us/help/4018332

https://support.microsoft.com/en-us/help/4461476

https://support.microsoft.com/en-us/help/5001982

https://support.microsoft.com/en-us/help/5001985

http://www.nessus.org/u?42ab6861

http://www.nessus.org/u?fd4508ff

Plugin Details

Severity: High

ID: 154038

File Name: smb_nt_ms21_oct_office.nasl

Version: 1.5

Type: local

Agent: windows

Published: 10/12/2021

Updated: 10/15/2021

Dependencies: office_installed.nasl, smb_hotfixes.nasl, ms_bulletin_checks_possible.nasl

Risk Information

CVSS Score Source: CVE-2021-40471

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:office

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2021

Vulnerability Publication Date: 10/12/2021

Reference Information

CVE: CVE-2021-40454, CVE-2021-40471, CVE-2021-40472, CVE-2021-40473, CVE-2021-40479

MSKB: 4018332, 4461476, 5001982, 5001985

MSFT: MS21-4018332, MS21-4461476, MS21-5001982, MS21-5001985

IAVA: 2021-A-0468, 2021-A-0472, 2021-A-0475, 2021-A-0465, 2021-A-0473