CVE-2019-0211

A vulnerability in Apache server versions 2.4.17–2.4.38 caused by an out-of-bounds array access can lead to an arbitrary function call. An attacker can trigger this to execute code in the context of the parent Apache process which often runs as root. In order for the exploit to trigger however, the Apache process must gracefully restart. This can be done on demand using apache2ctl graceful, but is also done automatically once at day by the logrotate utility (according to the original disclosure).

This exploit is a Local Privilege Escalation (LPE) vulnerability, so an attacker would already need to have some control on the system. This likely could be achieved through some kind of application vulnerability depending on what the Apache server is running.