Apache Httpd 2.4.18 Exploit 'link' < 2026 Edition >

To secure a system running version 2.4.18, follow these steps:

) who can execute code (via PHP or CGI) can manipulate the scoreboard. When the parent process performs a graceful restart, it can be tricked into executing arbitrary code with root privileges

Beyond data, an attacker could use the server as a pivot point to attack other systems within a network, potentially leading to a widespread compromise.

: When the root parent process reads the compromised scoreboard during the restart, it processes the fuzzed configuration arrays. This triggers an arbitrary function call executing the attacker's payload as root , completely compromising the host machine.

For penetration testers and security researchers, several public tools and proof-of-concept (PoC) codes are available to confirm the presence of these vulnerabilities: apache httpd 2.4.18 exploit

The Apache HTTP Server version 2.4.18 (released in late 2015) is widely known in the cybersecurity community as a classic "legacy" target, frequently appearing in penetration testing labs like Hack The Box (HTB).

Deep Dive: Understanding the Apache HTTPD 2.4.18 Exploit Ecosystem

: Memory tracking bugs in HTTP/2 session handling can be forced via fuzzed network input to read memory regions after they are freed during connection shutdown. Verification and Diagnostic Commands

If you are responsible for maintaining this server, I can help you with: Checking if specific apply to your OS To secure a system running version 2

A WAF can be configured with rules that detect and prevent the exploitation attempts.

| CVE ID | Vulnerability Type | Apache 2.4.18 Impact | CVSS Score (v3) | Exploit Availability | | :--- | :--- | :--- | :--- | :--- | | | Authentication Bypass | X.509 Certificate Bypass with HTTP/2 | 7.5 (High) | Proof-of-Concept (GitHub) | | CVE-2016-5387 | Request Smuggling (HTTP_PROXY) | Remote CGI Proxy Hijacking | 7.5 (High) | Not Public | | CVE-2016-8743 | Request Smuggling | Response Splitting & Cache Poisoning | 7.5 (High) | Not Public | | CVE-2017-9798 | Information Disclosure (Optionsbleed) | Arbitrary Process Memory Read | 5.3 (Medium) | Metasploit Module | | CVE-2019-0211 | Privilege Escalation | Local Root (via CGIs) | 8.8 (High) | Public Exploit (GitHub) | | CVE-2019-10082 | Use After Free (HTTP/2) | RCE / Denial of Service | 9.8 (Critical) | Not Public | | CVE-2016-1546 | Denial of Service (DoS) | Thread Starvation via mod_http2 | 7.5 (High) | Not Public |

With control over the server, attackers can access sensitive data stored on the server, including but not limited to, website data, user data, and more.

The server configuration for client-side certificate authentication may be ignored during the transition between protocol phases. This triggers an arbitrary function call executing the

Apache Security Reports (2.4.x) : Official list of all patched vulnerabilities.

Apache uses a shared memory (SHM) area called all_buckets to manage worker processes.

The only responsible way to "fix" an exploit for version 2.4.18 is to move away from it.

A viable information disclosure tool, but not a remote shell exploit . Searches for an "apache 2.4.18 shell exploit" due to HTTPOXY are misguided.