Attackers typically overwrite function pointers in the shared memory to execute arbitrary code with root authority.
Can trigger a read of freed memory during connection shutdown, potentially exposing sensitive information. apache httpd 2.4.18 exploit
Because the mod_http2 implementation within 2.4.18 lacks mature stream-limit controls, an attacker can open a single TCP connection and initiate thousands of fake, slow-reading HTTP/2 multiplexed streams. The server allocates worker threads and memory to handle each sub-stream, quickly exhausting system RAM and driving CPU utilization to 100%. 3. How Security Professionals Audit Apache 2.4.18 The server allocates worker threads and memory to
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CVE-2017-9798, discovered by Hanno Böck, was a use-after-free vulnerability in mod_http2 . When Apache 2.4.18 was compiled with HTTP/2 support (not default in 2.4.18, but common), an attacker could trigger a memory leak. The leak disclosed the contents of the server’s memory, potentially including htaccess directives, private keys, or session data. When Apache 2
Attackers rarely rely on a single "silver bullet" exploit for version 2.4.18. Instead, they leverage the specific protocol handling flaws present in this release.
1. Understanding the Vulnerability Landscape of Version 2.4.18