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

Description

This security bulletin contains information about 1 vulnerability.

1) Spoofing attack (CVE-ID: CVE-2024-43461)

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

CVSSv4: 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/E:A/U:Red

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.

Remediation

Install update from vendor's website.

References

• 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/