Security Updates for Microsoft Office Products (July 2021)

high Nessus Plugin ID 151595
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 a security feature bypass vulnerability.

Description

The Microsoft Office Products are missing security updates. It is, therefore, affected by a security feature bypass vulnerability. An attacker can exploit this and bypass the security feature and perform unauthorized actions compromising the confidentiality and integrity of the system/application.

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

Solution

Microsoft has released the following security updates to address this issue:
-KB5001979
-KB5001983

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/kb/5001983

https://support.microsoft.com/kb/5001979

Plugin Details

Severity: High

ID: 151595

File Name: smb_nt_ms21_jul_office.nasl

Version: 1.6

Type: local

Agent: windows

Published: 7/13/2021

Updated: 9/16/2021

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

Risk Information

CVSS Score Source: CVE-2021-34469

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

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

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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: 7/13/2021

Vulnerability Publication Date: 7/13/2021

Reference Information

CVE: CVE-2021-34469

MSKB: 5001979, 5001983

MSFT: MS21-5001979, MS21-5001983

IAVA: 2021-A-0316-S