Untrusted data passed to unserialize() can be manipulated to trigger "gadget chains"—sequences of existing code within the application that, when executed during object destruction, perform malicious actions like writing a web shell. Security & Hardening Guide
Let's assume a target running PHP 7.3.0 (Zend Engine v3.4.0) with a vulnerable library that unserializes user input. zend engine v3.4.0 exploit
A PoC exploit for this vulnerability has been publicly disclosed. The exploit involves creating a specially crafted PHP script that: Untrusted data passed to unserialize() can be manipulated
The Zend Engine manages memory through a custom allocator (). Historically, exploits like CVE-2010-4697 have used "Magic Methods" (__set, __get) to trigger use-after-free conditions. The exploit involves creating a specially crafted PHP
The vulnerability, identified as CVE-2022-22623, is a buffer over-read issue in the zend_string_extend function. This function is used to extend the length of a string in PHP. The issue arises when the function fails to properly validate the new length of the string, allowing an attacker to read beyond the boundaries of the allocated memory.
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