Spoofing attack in Microsoft Windows MSHTML Platform and Internet Explorer

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 11 24H2 10.0.26100.1742

Windows Server: before 2022 23H2 10.0.25398.1128

CPE2.3

• cpe:2.3:a:microsoft:microsoft_internet_explorer:11.0.19041.4355:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_internet_explorer:11.0.22621.3374:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_internet_explorer:11.0.19041.4239:*:*:*:*:*:*:*

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.