Isolate the PHP 5.6.40 application from the rest of your network infrastructure. Run the application inside a minimal Docker container.
PHP 5.6.40 is a relatively old version of PHP, and while it's known that older versions may have vulnerabilities that have been discovered and patched in later versions, specific vulnerabilities can include:
This link provides JSON and XML feeds, official CVSS scores, and impact metrics.
Some Linux enterprise distributions and premium repositories backport critical security fixes to legacy PHP versions independently of the official PHP development team. php version 5640 vulnerabilities link
: The cryptographic libraries used to handle HTTPS traffic, stream sockets, and data encryption contain known vulnerabilities like Heartbleed, CCS Injection, and various padding oracle attacks.
Unpatched memory management issues in the PHP core can lead to service disruptions or, in some cases, remote code execution.
I see you're looking for information on PHP version 5.6.40 vulnerabilities. Here's what I found: Isolate the PHP 5
Provides a comprehensive table of all known vulnerabilities, including CVSS scores and impact types.
Released on January 10, 2019, PHP 5.6.40 marked the absolute end-of-life (EOL) for the entire PHP 5 release branch. Because the PHP community stopped issuing security patches for this version years ago, legacy web applications remaining on this release remain fully exposed to automated botnets, data breaches, and ransomware.
Despite being entirely unsupported, millions of legacy web applications still run on PHP 5.6.40. Operating an outdated environment exposes servers to severe security risks, automated exploit bots, and compliance violations. The Danger of Running PHP 5.6.40 I see you're looking for information on PHP version 5
After 5.6.40 was released, many critical CVEs were discovered that affect the 5.6 branch but were for 5.6.x. Examples include:
When an attacker tricks a legacy application into parsing a malicious or deeply nested archive file path, PHP reads past allocated buffer limits. This can result in the leakage of sensitive data stored in neighboring memory sectors, such as database credentials or active session tokens. 3. XML-RPC Server Exploitation