#VU72192 Buffer overflow in Microsoft Office and Microsoft Word - CVE-2023-21716

Vulnerability identifier: #VU72192

Vulnerability risk: High

CVSSv4.0: 8.4 [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:A/U:Amber]

CVE-ID: CVE-2023-21716

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Word
Client/Desktop applications / Office applications

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing RTF files. A remote attacker can create a specially crafted RTF document, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 365, 2013 RT Service Pack 1 - 2013, 2016, 2019 for Mac - 2019, 2021

Microsoft Word: before 16.0.10395.20020, 16.0.14326.21336, 16.0.14332.20461, 16.0.14931.20926, 16.0.15601.20538, 16.0.15831.20280, 16.0.15928.20282, 16.0.16026.20200, 16.0.10395.20020

---

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21716

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.