: This often refers to a programming function (like PHP's include statement) or a parameter name ( ?file=include ) used to load local or remote files dynamically.
Path traversal is broader. It happens when an application reads a file from the disk based on user input (like downloading an invoice or viewing an image) but fails to restrict the path. An attacker can use this to read configuration files, source code, or sensitive system logs. Potential Impact and Consequences
Consider a PHP application that loads language files dynamically based on user selection:
Example payload after full decoding: https://victim.com/page.php?include=../../../../root/.ssh/id_rsa -include-..-2F..-2F..-2F..-2Froot-2F
: Kunta Kinte is a young Mandinka man from The Gambia who is captured and sold into slavery in the United States in the late 18th century. The Journey
The string -include-..-2F..-2F..-2F..-2Froot-2F is not random noise. It is a deliberate, targeting an include parameter to read or execute files from the /root/ directory. Understanding it allows defenders to write better filters, update WAF rules, and educate developers on why input whitelisting is non-negotiable.
[User Input] -> `-include-..-2F..-2F..-2F..-2Froot-2Fsecret.txt` │ ▼ [Server Interpretation] -> /var/www/html/public/../../../../root/secret.txt │ ▼ [Final Resolved Path] -> /root/secret.txt : This often refers to a programming function
In php.ini , you can disable allow_url_fopen and allow_url_include to prevent remote file inclusion. For local inclusion, consider using realpath() to verify that the resolved path stays within the intended directory.
$base = '/var/www/html/'; $user_path = $base . $_GET['file']; $real = realpath($user_path); if ($real === false || strpos($real, $base) !== 0) die('Invalid path');
: Attackers frequently target /etc/passwd on Linux systems to enumerate valid usernames, or boot configurations to understand the underlying infrastructure. An attacker can use this to read configuration
Attackers can read sensitive files like /etc/passwd , database credentials, application source code, and configuration files.
The string include-..-2F..-2F..-2F..-2Froot-2F represents a classic cybersecurity vulnerability exploitation pattern known as (or Directory Traversal). In web application security, this pattern is used by attackers to escape the standard web root directory and access restricted files on the server operating system.
Use:
Use programming functions that resolve absolute paths and strip out traversal tokens like ../ . In PHP, basename() returns only the filename component of a path, stripping out directory structures entirely.