Kaspersky Threats

Detect date

?

02/14/2023

Severity

?

Critical

Description

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

Below is a complete list of vulnerabilities:

A remote code execution vulnerability in Windows Graphics Component can be exploited remotely to gain privileges.
An information disclosure vulnerability in Microsoft Office can be exploited remotely to obtain sensitive information.
A remote code execution vulnerability in Microsoft Word can be exploited remotely to execute arbitrary code.
A spoofing vulnerability in Microsoft OneNote can be exploited remotely to spoof user interface.
A security feature bypass vulnerability in Microsoft 365 Apps for Enterprise can be exploited remotely to bypass security restrictions.
An elevation of privilege vulnerability in Microsoft SharePoint Server can be exploited remotely to gain privileges.

Exploitation

The following public exploits exists for this vulnerability:

https://github.com/Elizarfish/CVE-2023-21823

https://github.com/FeatherStark/CVE-2023-21716

https://github.com/JMousqueton/CVE-2023-21716

https://github.com/gyaansastra/CVE-2023-21716

https://github.com/mikesxrs/CVE-2023-21716_YARA_Results

https://github.com/Xnuvers007/CVE-2023-21716

https://github.com/hv0l/CVE-2023-21716_exploit

https://github.com/maldev866/WordExp_CVE_2023_21716

https://github.com/CKevens/CVE-2023-21716-POC

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Affected products

Microsoft Office for iOS
Microsoft Word 2013 Service Pack 1 (32-bit editions)
Microsoft Word 2016 (32-bit edition)
Microsoft Office Online Server
Microsoft Office LTSC 2021 for 64-bit editions
Microsoft Office for Universal
Microsoft SharePoint Foundation 2013 Service Pack 1
Microsoft Word 2013 RT Service Pack 1
Microsoft Office 2019 for Mac
Microsoft Office LTSC 2021 for 32-bit editions
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
Microsoft OneNote for Android
Microsoft Office LTSC for Mac 2021
SharePoint Server Subscription Edition Language Pack
Microsoft Word 2016 (64-bit edition)
Microsoft SharePoint Server 2019
Microsoft Word 2013 Service Pack 1 (64-bit editions)
Microsoft Office for Android
Microsoft Office Web Apps Server 2013 Service Pack 1
Microsoft SharePoint Server Subscription Edition
Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft Office 2019 for 64-bit editions
Microsoft Office 2019 for 32-bit editions

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)

Original advisories

CVE-2023-21714
CVE-2023-21716
CVE-2023-21721
CVE-2023-21715
CVE-2023-21823
CVE-2023-21717

Impacts

?

ACE

[?]

OSI

[?]

SB

[?]

PE

[?]

SUI

[?]

Detect date ?	02/14/2023
Severity ?	Critical
Description	Multiple vulnerabilities were found in Microsoft Office. Malicious users can exploit these vulnerabilities to execute arbitrary code, gain privileges, obtain sensitive information, spoof user interface, bypass security restrictions. Below is a complete list of vulnerabilities: A remote code execution vulnerability in Windows Graphics Component can be exploited remotely to gain privileges. An information disclosure vulnerability in Microsoft Office can be exploited remotely to obtain sensitive information. A remote code execution vulnerability in Microsoft Word can be exploited remotely to execute arbitrary code. A spoofing vulnerability in Microsoft OneNote can be exploited remotely to spoof user interface. A security feature bypass vulnerability in Microsoft 365 Apps for Enterprise can be exploited remotely to bypass security restrictions. An elevation of privilege vulnerability in Microsoft SharePoint Server can be exploited remotely to gain privileges.
Exploitation	The following public exploits exists for this vulnerability: https://github.com/Elizarfish/CVE-2023-21823 https://github.com/FeatherStark/CVE-2023-21716 https://github.com/JMousqueton/CVE-2023-21716 https://github.com/gyaansastra/CVE-2023-21716 https://github.com/mikesxrs/CVE-2023-21716_YARA_Results https://github.com/Xnuvers007/CVE-2023-21716 https://github.com/hv0l/CVE-2023-21716_exploit https://github.com/maldev866/WordExp_CVE_2023_21716 https://github.com/CKevens/CVE-2023-21716-POC Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.
Affected products	Microsoft Office for iOS Microsoft Word 2013 Service Pack 1 (32-bit editions) Microsoft Word 2016 (32-bit edition) Microsoft Office Online Server Microsoft Office LTSC 2021 for 64-bit editions Microsoft Office for Universal Microsoft SharePoint Foundation 2013 Service Pack 1 Microsoft Word 2013 RT Service Pack 1 Microsoft Office 2019 for Mac Microsoft Office LTSC 2021 for 32-bit editions Microsoft 365 Apps for Enterprise for 64-bit Systems Microsoft SharePoint Enterprise Server 2016 Microsoft SharePoint Enterprise Server 2013 Service Pack 1 Microsoft OneNote for Android Microsoft Office LTSC for Mac 2021 SharePoint Server Subscription Edition Language Pack Microsoft Word 2016 (64-bit edition) Microsoft SharePoint Server 2019 Microsoft Word 2013 Service Pack 1 (64-bit editions) Microsoft Office for Android Microsoft Office Web Apps Server 2013 Service Pack 1 Microsoft SharePoint Server Subscription Edition Microsoft 365 Apps for Enterprise for 32-bit Systems Microsoft Office 2019 for 64-bit editions Microsoft Office 2019 for 32-bit editions
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)
Original advisories	CVE-2023-21714 CVE-2023-21716 CVE-2023-21721 CVE-2023-21715 CVE-2023-21823 CVE-2023-21717
Impacts ?	ACE [?] OSI [?] SB [?] PE [?] SUI [?]
Related products	Microsoft Office Microsoft Word Microsoft SharePoint
CVE-IDS ?	CVE-2023-218235.0Critical CVE-2023-217145.0Critical CVE-2023-217165.0Critical CVE-2023-217215.0Critical CVE-2023-217155.0Critical CVE-2023-217175.0Critical
KB list	5002323 5002352 5002325 5002347 5002342 5002313 5002330 5002350 5002309 5002312 5002346 5002353 5002316
Microsoft official advisories	Microsoft Security Update Guide
	Find out the statistics of the vulnerabilities spreading in your region

KLA20229Multiple vulnerabilities in Microsoft Office

KLA20229
Multiple vulnerabilities in Microsoft Office