Microsoft Edge File Extension Spoofing Remote Code Execution Vulnerability

December 11th, 2024
ZDI-24-1658 ZDI-CAN-25361

CVE ID

CVE-2024-49041

CVSS Score

7.5 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors

Microsoft

Affected Products

Edge

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Edge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the way Microsoft Edge prompts the user after a file is downloaded. A crafted file name can cause the true file extension to be hidden, misleading the user into believing that the file type is harmless. An attacker can leverage this vulnerability to execute code in the context of the current user.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49041

Disclosure Timeline

  • 2024-09-17 - Vulnerability reported to vendor
  • 2024-12-11 - Coordinated public release of advisory
  • 2024-12-11 - Advisory Updated

Credit

Peter Girnus - Trend Micro Zero Day Initiative

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