CWE-69 (Windows::DATA交换数据流处理不恰当) — Vulnerability Class 1

CWE-69 represents a critical input validation weakness where software fails to properly handle or detect Windows Alternate Data Streams (ADS). This flaw allows attackers to exploit the operating system’s file structure by hiding malicious payloads, metadata, or process information within secondary data streams attached to standard files. Because common tools like Windows Explorer and the command-line dir utility typically ignore these streams, attackers can bypass intended access restrictions and evade detection by security scanners or system administrators. To mitigate this risk, developers must implement rigorous input validation that explicitly checks for and sanitizes ADS usage. Furthermore, security controls should be configured to detect anomalous file attributes and restrict write access to streams, ensuring that all data associated with a file is fully visible and auditable by both the application and underlying security mechanisms.