Using EOL software violates industry standards like PCI-DSS (payment processing) and GDPR (data protection), which can lead to hefty fines.
There is no official PHP version "5.6.40" in the standard PHP release history. The official versions were 5.6.39 and then 5.6.40 (Release Date: Jan 10, 2019). However, given the high likelihood of a typo, this post covers PHP 5.6.40 (the last official security release of the 5.6 branch) and also addresses the possibility you meant the 5.6.4.0 alpha build or a general search for CVE links.
; Disable dangerous functions disable_functions = exec,passthru,shell_exec,system,proc_open,popen,curl_exec,curl_multi_exec,parse_ini_file,show_source ; Disable vulnerable extensions if not strictly needed exif.enable = Off Use code with caution. Step 4: Containerization and Isolation php version 5640 vulnerabilities link
Step 2: Utilize Extended Lifecycle Support (If Upgrading Immediately is Impossible)
https://nvd.nist.gov/vuln/search/results?form_type=Basic&results_type=overview&query=PHP+5.6.40&search_type=all Using EOL software violates industry standards like PCI-DSS
: Red Hat Enterprise Linux (RHEL) and CloudLinux provide paid extended lifecycle support lifespans, backporting critical security fixes directly into their custom packages. Step 3: Deploy a Web Application Firewall (WAF)
While PHP 5.6.40 was released to fix a specific set of security flaws, it remains vulnerable to numerous subsequent exploits discovered in the PHP 5 architecture, as well as flaws inherent to its dependencies. 1. Remote Code Execution (RCE) via unserialize() However, given the high likelihood of a typo,
: A heap-based buffer over-read in mbstring regular expression functions. A remote attacker could send crafted multibyte sequences to cause a system compromise or crash.
Attackers can exploit flaws in older PHP versions to execute arbitrary code on the server, gaining full control over the website and underlying infrastructure.
: Search the NVD CVE Portal using the product query cpe:2.3:a:php:php:5.6.40 to see a full, dynamically updated list of scored vulnerabilities.