: An out-of-bounds read error in the xmlrpc_decode function. Remote attackers could cause memory corruption or information disclosure via a hostile XML-RPC server.
: Systems running 5.6.4x or earlier are often flagged for multiple vulnerabilities including: php version 5640 vulnerabilities link
A remote code execution (RCE) vulnerability that affects PHP running on Windows in CGI configurations. Attackers can bypass previous protections to execute arbitrary commands. Buffer Overflows & Underflows: CVE-2016-10166: An integer underflow in the gd_interpolation.c CVE-2019-6977: A heap-based buffer overflow in gdImageColorMatch Memory Corruption: CVE-2019-9020: A heap-based buffer over-read in xmlrpc_decode that can lead to system compromise. CVE-2019-9021: : An out-of-bounds read error in the xmlrpc_decode function
: For a broader look at PHP security, papers like the USENIX study on SSRF-Defenses in PHP Applications discuss modern attack vectors that still affect legacy environments. PHP 5.6.x < 5.6.40 Multiple vulnerabilities. | Tenable® you will understand that
After reviewing the 70+ vulnerabilities linked to PHP 5.6.40, you will understand that