Remote code execution in Microsoft Excel

1) Deserialization of Untrusted Data

EUVDB-ID: #VU89487

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-2024-30042

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

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

The vulnerability exists due to insecure input validation when processing serialized data in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file 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

Office Online Server: All versions

Microsoft Office: 2019

Microsoft Excel: 2016

Microsoft Office LTSC 2021: 32 bit editions - 64 bit editions

Microsoft 365 Apps for Enterprise: 32-bit Systems - 64-bit Systems

CPE2.3

• cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_office:*:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_excel:*:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_office_ltsc_2021:32:bit editions:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_office_ltsc_2021:64:bit editions:*:*:*:*:*:
• 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:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-30042

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?

No. We are not aware of malware exploiting this vulnerability.