Spoofing attack in Microsoft products - CVE-2024-43461

Vulnerability identifier: #VU97025

CSH Severity: Critical

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-43461

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

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.

Microsoft Internet Explorer
Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 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
Windows Server - addressed in versions 2008 R2 6.1.7601.27320, 2008 6.0.6003.22870, 2012 R2 6.3.9600.22175, 2012 6.2.9200.25073, 2022 23H2 10.0.25398.1128, 2022 10.0.20348.2695, 2022 10.0.20348.2700

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

• Spoofing attack in Microsoft Windows MSHTML Platform and Internet Explorer