Spoofing attack in Microsoft Windows MSHTML Platform and Internet Explorer

Published: 2024-09-10 | Updated: 2024-09-11

Risk	Critical
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2024-43461
CWE-ID	CWE-451
Exploitation vector	Network
Public exploit	This vulnerability is being exploited in the wild.
Vulnerable software	Microsoft Internet Explorer Client/Desktop applications / Web browsers 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) Spoofing attack

EUVDB-ID: #VU97025

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2024-43461

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to the way the Internet Explorer displays a user prompt after a file is downloaded. A remote attacker can create a specially crafted filename that causes the true file extension to be hidden, trick the victim into downloading it and potentially compromise the affected system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Internet Explorer: 11 - 11.1790.17763.0

Windows: before 10 21H2 10.0.19044.4894, 10 22H2 10.0.19041.4894, 10 22H2 10.0.19045.4894, 10 1507 10.0.10240.20766, 10 1607 10.0.14393.7336, 10 1809 10.0.17763.6293, 11 21H2 10.0.22000.3197, 11 22H2 10.0.22621.4169, 11 23H2 10.0.22631.4169, 11 24H2 10.0.26100.1742, 10 21H2 10.0.19044.4894, 10 21H2 10.0.19044.4894, 10 21H2 10.0.19044.4894, 10 21H2 10.0.19044.4894, 10 21H2 10.0.19044.4894, 10 21H2 10.0.19044.4894, 10 21H2 10.0.19044.4894, 10 21H2 10.0.19044.4894

Windows Server: before 2008 R2 6.1.7601.27320, 2008 6.0.6003.22870, 2012 R2 6.3.9600.22175, 2012 6.2.9200.25073, 2022 10.0.20348.2695, 2022 10.0.20348.2700, 2022 23H2 10.0.25398.1128, 2008 R2 6.1.7601.27320, 2008 R2 6.1.7601.27320

CPE2.3

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-43461
http://www.zerodayinitiative.com/blog/2024/9/10/the-september-2024-security-update-review
http://www.zerodayinitiative.com/advisories/ZDI-24-1207/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.