Windows Mark of the Web Security Feature Bypass Vulnerability

A security feature in Windows that warns users about potentially dangerous files downloaded from the internet can be bypassed, allowing malicious files to run without the expected warning.

This vulnerability exploits improper validation of the Mark of the Web (MOTW) stream attribute in Windows, allowing an attacker to craft specially formatted files that bypass the security prompt mechanism designed to protect against execution of untrusted downloaded content. The attack requires user interaction to execute the file, but circumvents the warning dialog that would normally alert users to the risk.