Security features bypass in Microsoft Windows Mark of the Web

1) Protection Mechanism Failure

EUVDB-ID: #VU97013

Risk: Critical

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:H/RL:O/RC:C]

CVE-ID: CVE-2024-38217

CWE-ID: CWE-693 - Protection Mechanism Failure

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures. An attacker can trick the victim into downloading a specially crafted file, evade Mark of the Web (MOTW) defenses and bypass security features such as SmartScreen Application Reputation security check and/or the legacy Windows Attachment Services security prompt.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: before 11 24H2 10.0.26100.1742

Windows Server: before 2022 23H2 10.0.25398.1128

CPE2.3

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-38217

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.