Php Version 5640 Vulnerabilities Verified Fix Jun 2026

This write-up provides a verified security analysis of PHP 5.6.40 , which was the final release of the 5.6 branch. Status Summary Release Date: January 10, 2019 End-of-Life (EOL):

This is a logic flaw in the version's core handling of serialized data. 2. Heap-Based Buffer Overflows php version 5640 vulnerabilities verified

Week 4 — Exploit Verification & Safe Proofs-of-Concept This write-up provides a verified security analysis of PHP 5

Current PHP Versions | The Evolution & History of PHP - Zend Heap-Based Buffer Overflows Week 4 — Exploit Verification

Week 5 — Automated Scanning & Patch Analysis

| CVE | Description | Impact | |------|-------------|--------| | | FastCGI (PHP-FPM) — specially crafted request causes 502 response and memory corruption | Remote Code Execution (RCE) under certain configurations | | CVE-2019-9641 | exif_read_data() — heap-based buffer over-read | Information disclosure / DoS | | CVE-2019-9021 | php_url_parse_ex() — invalid URL parsing leads to CRLF injection | HTTP response splitting, SSRF | | CVE-2019-9020 | xmlrpc_decode() — persistent use-after-free | RCE (theoretical, DoS confirmed) | | CVE-2016-1903 | imap_open() — improper argument filtering | RCE via mailbox name parameter (still present in 5.6.40) |