|top| — Apache Httpd 2.4.18 Exploit

If vulnerable, the front proxy forwards a single HTTP/2 stream, but the back-end Apache 2.4.18 sees two separate HTTP/1.1 requests. The second request ( POST /admin/delete ) bypasses any proxy-level authentication.

A use-after-free vulnerability in the mod_http2 session handling could be triggered with fuzzed input, potentially leading to unauthorized memory reads during connection shutdown. apache httpd 2.4.18 exploit

If HTTP/2 200 appears, the module is active. If vulnerable, the front proxy forwards a single

conn.send_data(stream_id, b'delete=1', end_stream=True) sock.send(conn.data_to_send()) If HTTP/2 200 appears, the module is active

Disclaimer: This article is for educational and defensive purposes only. Unauthorized exploitation of any system is illegal and unethical. Always obtain proper authorization before testing any vulnerability.

. While it is often associated with "Shellshock" in Capture The Flag (CTF) environments like HackTheBox, Shellshock is technically a Bash vulnerability (CVE-2014-6271) that can be triggered through Apache's CGI module.