KLA20229
Multiple vulnerabilities in Microsoft Office

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:

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

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

https://github.com/Lord-of-the-IoT/CVE-2023-21716

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

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

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

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