Remote code execution in Microsoft Office

1) Out-of-bounds write

EUVDB-ID: #VU77279

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-33146

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

Exploit availability: No

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 - 2019 for Mac

Microsoft Office LTSC 2021: 2021 for Mac

Microsoft 365 Apps for Enterprise: before 2305 16501.20210

External links

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