Security Updates for Microsoft Excel Products (May 2021)

high Nessus Plugin ID 149397

Synopsis

The Microsoft Excel Products are affected by multiple vulnerabilities.

Description

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

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-31175, CVE-2021-31177, CVE-2021-31179)

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-31174, CVE-2021-31178)

Solution

Microsoft has released the following security updates to address this issue:
-KB5001918
-KB5001936

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

http://www.nessus.org/u?354a1fb3

http://www.nessus.org/u?1df6f8ba

Plugin Details

Severity: High

ID: 149397

File Name: smb_nt_ms21_may_excel.nasl

Version: 1.7

Type: local

Agent: windows

Published: 5/11/2021

Updated: 1/2/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.6

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

CVSS Score Source: CVE-2021-31179

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.2

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:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:excel

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/11/2021

Vulnerability Publication Date: 5/11/2021

Reference Information

CVE: CVE-2021-31174, CVE-2021-31175, CVE-2021-31177, CVE-2021-31178, CVE-2021-31179

IAVA: 2021-A-0228-S

MSFT: MS21-5001918, MS21-5001936

MSKB: 5001918, 5001936