Path Traversal

Summary

Path Traversal is a type of application attack where an attacker manipulates file paths to access files and directories outside the intended scope, potentially exposing sensitive data or system files.

Key Characteristics

• Exploits insufficient input validation on file path parameters.
• Uses sequences like “../” to navigate directories upward.
• Targets web applications, APIs, and file management systems.
• Can lead to unauthorized access, data leakage, or remote code execution.
• Often combined with other attacks such as remote file inclusion.

Defensive Controls

• Implement strict input validation and sanitization for file paths.
• Use allowlists to restrict accessible directories and files.
• Employ secure coding practices to avoid direct user input in file operations.
• Configure proper file system permissions to limit access.
• Utilize web application firewalls (WAFs) to detect and block traversal attempts.

Related Security Solutions

Security solutions addressing Path Traversal include web application firewalls, secure coding frameworks, runtime application self-protection (RASP), and vulnerability scanners that detect improper file access controls.