Let's outline:
: This indicates the final target directory, which decodes to /root/ —the home directory of the system administrator (root user) on Linux and Unix-like operating systems. How Web Application Firewalls (WAFs) Are Bypassed
Tools like grep :
You may have noticed the exact string -include-..-2F..-2F..-2F..-2Froot-2F in reports from tools like , Burp Suite , or WFuzz . These scanners use a dictionary of obfuscated payloads to test for LFI. The payload is designed to: -include-..-2F..-2F..-2F..-2Froot-2F
directory is often the final goal of these challenges, signaling that the attacker has achieved full control over the system. 4. How to Prevent It To stop these attacks, developers should: Validate Input
: This is the URL-encoded representation of a forward slash ( / ).
The string -include-..-2F..-2F..-2F..-2Froot-2F is a classic payload used to exploit a Path Traversal (or Directory Traversal) vulnerability in web applications. What the Payload Does Let's outline: : This indicates the final target
Your WAF must decode payloads before inspection. A filter that only looks for ../ will miss -2F or %2F variations. Normalize the input by first replacing -2F with / (and handling %2F similarly) and then removing any .. sequences.
In standard operating systems, ../ signifies a command to move up one directory level.
SecRule ARGS "(?-i)-include-\.\.-2F" "id:1001,deny,status:403,msg:'Obfuscated LFI attempt'" The payload is designed to: directory is often
include($_GET['page']);
In web security, developers often use function names like include or require to load files dynamically. When input validation is weak, attackers inject specific characters to break out of the intended web folder. : The universal symbol to move up one parent directory. -2F or %2F : The URL-encoded format for a forward slash ( / ).
: Like the -2F seen in your query, often used in specific framework exploits or to bypass poorly configured custom regex filters. Real-World Impact
Use static analysis tools to find dangerous include($_GET['param']) patterns in your codebase. Automated scanners can also test for LFI by injecting strings like -include-..-2F..-2F..-2F..-2Fetc-2Fpasswd .