Apache Httpd — 2.4.18 Exploit

Below is a detailed write-up of the most significant exploits and vulnerabilities specifically affecting Apache 2.4.18. 1. HTTP/2 Stream Worker Starvation (CVE-2016-1546) This is a critical Denial of Service vulnerability affecting the module in version 2.4.18. Common Vulnerabilities and Exposures (CVE) Vulnerability Mechanism:

1. CARPE (DIEM): Local Root Privilege Escalation (CVE-2019-0211) apache httpd 2.4.18 exploit

This vulnerability affects the mod_rewrite module. When the server used a rewrite rule that copied user-supplied input from a URL path to a HTTP response header (specifically the Location header), an attacker could inject CRLF (Carriage Return and Line Feed) characters. This led to HTTP response splitting, where the attacker could control the second part of the response, enabling cross-site scripting (XSS) attacks or cache poisoning. Below is a detailed write-up of the most

The mod_session_crypto module was vulnerable to padding oracle attacks . Attackers could potentially decrypt and modify session data stored in user cookies because the server did not properly verify the integrity of the encrypted data. This led to HTTP response splitting, where the

Protecting against this and similar exploits involves a multi-faceted approach:

Although discovered later, the CVE-2019-0211 vulnerability affects version 2.4.18, allowing low-privileged scripts (like PHP) to execute code with root privileges through a flaw in worker process management.