Spoofing attack in Microsoft Office Trust Center

1) Spoofing attack

EUVDB-ID: #VU58926

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-43255

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a local attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in Microsoft Office Trust Center. A local attacker can spoof page content.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2013 - 2019

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

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

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43255

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

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.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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