Version 2.4.18 was among the early versions to support the mod_http2 module, which introduced several stability issues.
Systems running Apache 2.4.18 should be considered compromised if exposed to the internet without a Web Application Firewall (WAF) or OS-level ACLs. apache httpd 2.4.18 exploit
Most modern Linux distributions (Ubuntu 20.04+, Debian 10+) provide much newer versions. Update your package manager: sudo apt-get update && sudo apt-get upgrade apache2 Use code with caution. Version 2
Thus, a successful exploit against a generic 2.4.18 often fails against a patched distribution version, even if the version string is identical. apache httpd 2.4.18 exploit
This is one of the most significant issues discovered shortly after the 2.4.18 release. Apache was found to be too lenient in how it parsed HTTP response headers.