CWE-66 (标识虚拟资源的文件名处理不恰当) — Vulnerability Class 1

CWE-66 represents a critical input validation weakness where software fails to properly sanitize file names that reference virtual resources rather than standard disk files. Attackers typically exploit this by injecting special characters or protocols, such as null bytes or device identifiers, into file paths to trick the application into accessing unintended system resources or executing arbitrary commands. This vulnerability often arises when developers assume all file names correspond to actual files on the filesystem, ignoring the potential for aliasing or redirection. To mitigate this risk, developers must implement rigorous input validation that strictly whitelists allowed characters and explicitly checks for virtual resource indicators. Additionally, using canonical path resolution and sandboxing file operations can prevent the application from interacting with unauthorized system components, ensuring that file-based operations remain confined to the intended, secure directory structure.