Security features bypass in Microsoft Windows Mark of the Web



Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-38217
CWE-ID CWE-693
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Protection Mechanism Failure

EUVDB-ID: #VU97013

Risk: Critical

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Red]

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 22H2 10.0.22621.4169, 11 23H2 10.0.22631.4169

Windows Server: before

CPE2.3 External links

https://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.



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