CVE-2018-8011
By specially crafting HTTP requests, the mod_md challenge handler would dereference a NULL pointer and cause the child process to segfault. This could be used to DoS the server. Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.33).
Date published : 2018-07-18
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-8011