Remote code execution in Microsoft Office Graphics
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-43875 |
| CWE-ID | CWE-190 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Microsoft Office Client/Desktop applications / Office applications Microsoft 365 Apps for Enterprise Client/Desktop applications / Office applications Microsoft Word Client/Desktop applications / Office applications Microsoft Office LTSC Client/Desktop applications / Other client software |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Integer overflow
EUVDB-ID: #VU58924
Risk: High
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2021-43875
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow within the glTF-SDK component. A remote attacker can trick the victim to open a specially crafted Word document, trigger an integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Office: 2019 for Mac - 2019
Microsoft Office LTSC: 32 bit editions - 2021 for Mac
Microsoft 365 Apps for Enterprise: 32-bit Systems - 64-bit Systems
Microsoft Word: 2019 - 2021
CPE2.3- cpe:2.3:a:microsoft:microsoft_office:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office_ltsc:32:bit editions:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office_ltsc:64:bit editions:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office_ltsc:2021:for Mac:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_365_apps_for_enterprise:32-bit_Systems:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_365_apps_for_enterprise:64-bit_Systems:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_word:*:*:*:*:*:microsoft_office:*:*
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43875
https://www.zerodayinitiative.com/advisories/ZDI-22-813/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website or open a file.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
