Apache released patches for these vulnerabilities in version 2.4.20. To mitigate these vulnerabilities, users are advised to upgrade to Apache HTTP Server version 2.4.20 or later.
I can then provide specific update commands or configuration hardening steps tailored to your setup.
to test vulnerabilities legally (e.g., using Docker, Vagrant, or a local VM with an intentionally vulnerable Apache version).
This vulnerability arises from how Apache handles whitespace in HTTP response headers. An attacker could inject malicious headers, leading to HTTP response splitting or cache poisoning.
Additional information and technical details can be found on:
One notable exploit related to Apache httpd 2.4.18 is CVE-2017-5638, also known as the "Apache Struts 2 Remote Code Execution Vulnerability" but more accurately attributed to a vulnerability in Apache httpd itself or more specifically in the mod_session_crypto module. This vulnerability allows an attacker to execute arbitrary code on the server by exploiting a weakness in the way the server handles certain HTTP requests. Specifically, this exploit could allow an attacker to: