Php 5.3.10 Exploit Instant

/usr/bin/php-cgi /path/to/index.php The bug occurred in how PHP parsed the query string. If an attacker sent a request without a script name (e.g., http://target.com/?-s ), the PHP engine would misinterpret the query string .

POST /?-d+allow_url_include%3don+-d+auto_prepend_file%3dphp%3a//input HTTP/1.1 Host: vulnerable.com Content-Type: application/x-www-form-urlencoded Content-Length: 25 <?php system('id'); ?> php 5.3.10 exploit

When PHP is run in CGI mode (using php-cgi ), the web server passes request data to the PHP binary via command-line arguments. Normally, a request to index.php translates to: /usr/bin/php-cgi /path/to/index

The attacker sees the raw PHP source code of the application, including database passwords and API keys. The Grand Prize: Arbitrary Code Execution ( -d and -B ) Seeing source code is bad, but executing code is worse. The -d flag allows you to set php.ini directives on the fly. Combined with -B (Run code before processing input), we get RCE. Normally, a request to index

While this specific vector is mostly extinct in modern cloud infrastructure, it lives on in embedded systems and legacy internal networks. If you find this during a penetration test, you have effectively found a "Golden Ticket" to execute system commands.