Zero-day vulnerability in Microsoft Internet Explorer

Spoofing attack
CVE-2024-43461

Vulnerability details

Advisory: SB2024091097 - Spoofing attack in Microsoft Windows MSHTML Platform and Internet Explorer

Vulnerable component: Microsoft Internet Explorer

CVE-ID: CVE-2024-43461

CVSSv3 score: 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

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

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.

External links:

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

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.