deserialization-php

To exploit PHP deserialization vulnerabilities for remote code execution, you need to identify untrusted data passed to the unserialize() function or phar:// streams, then leverage known gadget chains via tools like PHPGGC to inject malicious payloads and execute arbitrary commands on the server.

A gadget chain in PHP deserialization attacks is a sequence of methods within target frameworks or libraries that are triggered when untrusted data is unserialized. Tools like PHPGGC generate these chains to manipulate application logic and achieve remote code execution.

PHAR deserialization occurs when PHP filesystem functions process PHAR archives via phar:// streams, automatically unserializing the archive's metadata. This allows attackers to trigger gadget chains for remote code execution without directly calling the unserialize() function.

Yes, exploiting PHP deserialization vulnerabilities with PHPGGC requires knowledge of the target framework and its libraries. This prerequisite knowledge is necessary to select the correct gadget chain that will successfully execute during the unserialization process.

Yes, you can use Burp Suite to test for PHP deserialization vulnerabilities by intercepting and modifying requests to inject untrusted data into unserialize() parameters or phar:// streams, then observing the application's response for successful remote code execution.

The best way to identify PHP serialization formats in user-provided data is to look for common serialization patterns such as PHP objects, arrays, and strings within request parameters or cookies. Recognizing these formats is the first step before attempting to exploit the deserialization vulnerability.