KLA12389 Multiple vulnerabilities in Microsoft Office

Multiple vulnerabilities were found in Microsoft Office. Malicious users can exploit these vulnerabilities to gain privileges, execute arbitrary code, spoof user interface, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. An elevation of privilege vulnerability in Microsoft Jet Red Database Engine and Access Connectivity Engine can be exploited remotely to gain privileges.
2. A remote code execution vulnerability in Microsoft Office Graphics can be exploited remotely to execute arbitrary code.
3. A spoofing vulnerability in Microsoft Office Trust Center can be exploited remotely to spoof user interface.
4. A spoofing vulnerability in Microsoft SharePoint Server can be exploited remotely to spoof user interface.
5. A remote code execution vulnerability in Microsoft SharePoint Server can be exploited remotely to execute arbitrary code.
6. An information disclosure vulnerability in Visual Basic for Applications can be exploited remotely to obtain sensitive information.
7. A remote code execution vulnerability in Microsoft Excel can be exploited remotely to execute arbitrary code.
8. An elevation of privilege vulnerability in Microsoft SharePoint can be exploited remotely to gain privileges.

Original advisories

CVE-2021-42293

CVE-2021-43875

CVE-2021-43255

CVE-2021-42320

CVE-2021-42294

CVE-2021-42309

CVE-2021-42295

CVE-2021-43242

CVE-2021-43256

CVE-2021-43876

Related products

Microsoft-Office

Microsoft-Excel

Microsoft-SharePoint

CVE list

CVE-2021-42293 high

CVE-2021-43875 critical

CVE-2021-43255 high

CVE-2021-42320 high

CVE-2021-42294 high

CVE-2021-42309 critical

CVE-2021-42295 high

CVE-2021-43242 high

CVE-2021-43256 critical

CVE-2021-43876 critical

KB list

5002054

5002047

4504710

4504745

5002101

5002045

5002015

5002099

5002033

5002103

4486726

5002059

5002008

5002055

5002098

5002061

5002097

5002105

5002071

5002104

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Impacts

• ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

• OSI

Obtain sensitive information. Exploitation of vulnerabilities with this impact can lead to capturing by abuser information, critical for user or system.

• PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

• SUI

Spoof user interface. Exploitation of vulnerabilities with this impact can lead to changes in user interface to beguile user into inaccurate behavior.

Affected Products

• Microsoft Excel 2013 Service Pack 1 (64-bit editions)Microsoft Office 2016 (32-bit edition)Microsoft Office LTSC 2021 for 64-bit editionsMicrosoft Office LTSC 2021 for 32-bit editionsMicrosoft Office 2019 for 64-bit editionsMicrosoft Office LTSC for Mac 2021Microsoft Office 2013 Service Pack 1 (32-bit editions)Microsoft Office 2016 (64-bit edition)Microsoft Office 2013 RT Service Pack 1Microsoft Office 2013 Service Pack 1 (64-bit editions)Office Online ServerMicrosoft Office Web Apps Server 2013 Service Pack 1Microsoft Office 2019 for MacMicrosoft Excel 2013 Service Pack 1 (32-bit editions)Microsoft Excel 2016 (64-bit edition)Microsoft 365 Apps for Enterprise for 64-bit SystemsMicrosoft Excel 2016 (32-bit edition)Microsoft Office 2019 for 32-bit editionsMicrosoft Excel 2013 RT Service Pack 1Microsoft 365 Apps for Enterprise for 32-bit SystemsMicrosoft SharePoint Enterprise Server 2016Microsoft SharePoint Enterprise Server 2013 Service Pack 1Microsoft SharePoint Server 2019