PHP version 5.6.40 was released on January 10, 2019 , as a final security update to address several critical bugs. Official security support for the entire PHP 5.6 branch ended on December 31, 2018
: Resolved issues in the xmlrpc_decode function ( CVE-2019-9020 ) and the PHAR extension ( CVE-2019-9021 ) that could lead to memory disclosure.
This page states unequivocally that . Version 5.6.40 was released after EOL. This means that any vulnerability discovered after January 2019 (including most CVEs listed above) is permanently unfixed in 5.6.40.
Web server crashes, website downtime, and disruption of business operations. 3. Information Disclosure php version 5640 vulnerabilities link
If the backend cannot be changed, wrap the application in a protective layer.
Upgrading ensures that any future vulnerabilities will be patched promptly. How to Proceed with an Upgrade Migrating from 5.6 to 8.x requires careful planning:
PHP is one of the most widely used programming languages on the web, powering millions of websites and web applications. However, like any software, PHP is not immune to security vulnerabilities. In this article, we'll focus on PHP version 5.6.40, a version that has been identified as having several vulnerabilities. We'll explore the risks associated with using outdated PHP versions, the specific vulnerabilities found in version 5.6.40, and why upgrading to a newer version is crucial for maintaining the security and integrity of your website. PHP version 5
PHP Vulnerabilities: Assessment, Prevention, and Mitigation - Zend
As Cloudways reports, the stable landscape has evolved to . Staying on 5.6.40 means missing out on:
: Functions handling image processing ( GD library ), file parsing ( EXIF data ), or string manipulation frequently suffer from boundary-checking flaws. Version 5
Vulnerabilities in data deserialization ( unserialize() ), buffer overflows in string handling, or flaws within third-party extensions allow attackers to inject malicious payloads.
Maintaining an environment on PHP 5.6.40 exposes the server to secondary vulnerabilities embedded in old container layers and system dependencies. PHP 5.6: Why you should upgrade - Influential Software
To audit specific CVEs (Common Vulnerabilities and Exposures) tied to PHP 5.6.40, use the following official security tracking links:
| Security Advisory / Source | Key Patched Vulnerabilities (CVEs) | Fixed in Version (Debian 8 "Jessie") | | :--- | :--- | :--- | | Freexian ELA-1091-1 | , CVE-2024-3096 (Password hash bypass, cookie validation bypass) | 5.6.40+dfsg-0+deb8u19 | | Freexian ELA-457-1 | CVE-2019-9675 , CVE-2020-7068 , CVE-2020-7071 , CVE-2021-21702 , CVE-2021-21704 , CVE-2021-21705 (DoS, memory corruption, SSRF) | 5.6.40+dfsg-0+deb8u14 | | Debian DLA-2188-1 | CVE-2020-7064 , CVE-2020-7066 , CVE-2020-7067 (Information disclosure, out-of-bounds reads) | 5.6.40+dfsg-0+deb8u11 | | Vulert Security Update | CVE-2019-11045 , CVE-2019-11046 (EXIF module vulnerabilities, DoS, arbitrary code execution) | 5.6.40+dfsg-0+deb8u8 | | Vulert Security Update | CVE-2019-9022 , CVE-2019-9637 , CVE-2019-9638 , CVE-2019-9639 , CVE-2019-9640 , CVE-2019-9641 (EXIF module issues, data leakage) | 5.6.40+dfsg-0+deb8u2 |
Here are the authoritative links to search for PHP 5.6.40 vulnerabilities: