PHP Object Serialization Vulnerabilities and Security Risks
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🧩 Exploiting PHP Object Serialization Vulnerabilities. The article discusses the risks associated with PHP object serialization, particularly focusing on unserialize vulnerabilities that can be exploited through poorly designed code. It explains how classes and their magic methods, such as __destruct, can be manipulated to execute arbitrary commands when user input is deserialized. The piece highlights the use of gadget chains, which are sequences of code that can be exploited, and details how PHP Phar files can be weaponized to trigger these vulnerabilities. It concludes by noting that while PHP 8.1 and above disable Phar file handling by default, the unserialize function remains a potential security risk if used with untrusted input.
