Remote code execution in Microsoft Office



| Updated: 2024-10-25
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-33146
CWE-ID CWE-787
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Microsoft Office
Client/Desktop applications / Office applications

Microsoft 365 Apps for Enterprise
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) Out-of-bounds write

EUVDB-ID: #VU77279

Risk: High

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2023-33146

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing .skp files. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2019 for Mac - 2019

Microsoft Office LTSC: 2021 for Mac

Microsoft 365 Apps for Enterprise: before

CPE2.3 External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-33146
https://www.zerodayinitiative.com/advisories/ZDI-23-1179/
https://www.zerodayinitiative.com/advisories/ZDI-23-1180/
https://www.zerodayinitiative.com/advisories/ZDI-23-1181/
https://www.zerodayinitiative.com/advisories/ZDI-23-1182/
https://www.zerodayinitiative.com/advisories/ZDI-23-1183/
https://www.zerodayinitiative.com/advisories/ZDI-23-1791/
https://www.zerodayinitiative.com/advisories/ZDI-23-1788/
https://www.zerodayinitiative.com/advisories/ZDI-23-1790/
https://www.zerodayinitiative.com/advisories/ZDI-23-1789/
https://www.zerodayinitiative.com/advisories/ZDI-23-1787/


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. However, proof of concept for this vulnerability is available.



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