A malicious worker can overwrite a bucket structure in the SHM with a fake one.
💡 If you cannot upgrade immediately, switching the MPM from prefork to event or worker can act as a temporary workaround for CVE-2019-0211, though this may impact compatibility with certain PHP modules like mod_php .
Write a fake status structure into the SHM that redirects a function call to a payload. apache httpd 2.4.18 exploit
being among the most notable. Below is a guide on how these vulnerabilities function and how to secure your server. 1. Cryptographic Padding Oracle (CVE-2016-0736) This vulnerability exists in the mod_session_crypto
Immediately inventory all systems with Server: Apache/2.4.18 in HTTP response headers. Upgrade or air-gap within 48 hours. A malicious worker can overwrite a bucket structure
Systems running Apache 2.4.18 should be considered compromised if exposed to the internet without a Web Application Firewall (WAF) or OS-level ACLs.
"Apache/2.4.18" "Ubuntu"
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.