Apache | Httpd 2.4.18 Exploit

An attacker can overwrite a function pointer in the shared memory. When the root process restarts, it executes the attacker's code with full root privileges. Exploitation Steps

Version 2.4.18 sits at a crossroads of web history. It was released in late 2015/early 2016, a period when the web was transitioning to and Always-on SSL . Most exploits for this version target these "new" features or the legacy way Apache manages its worker processes (the "Scoreboard"). apache httpd 2.4.18 exploit

Eventually, the entry point was , but an outdated OpenSSL 1.0.2g (DROWN attack) and a misconfigured mod_dav allowed file upload. The exploit chain used Apache as a vector, but no native 2.4.18 RCE. An attacker can overwrite a function pointer in

If the target server was compiled with mod_http2 (not always enabled by default in 2.4.18), a separate critical vulnerability exists (CVE-2016-1546). This is a memory corruption issue in the HTTP/2 ping handler. It was released in late 2015/early 2016, a

: The module failed to verify the integrity of encrypted session data before decryption. Because it used CBC (Cipher Block Chaining) mode without authenticated encryption, it was susceptible to a Padding Oracle Attack