Information disclosed from this page can be used to gain additional information about the target system. An attacker can gather reconnaissance information about the internals of the target web server, such as:
Server uptime
Individual request-response statistics and CPU usage of the working processes
Current HTTP requests, client IP addresses, requested paths, and processed virtual hosts
This type of information can help the attacker gain a greater understanding of the system in use and the other potential avenues of attack available.
Disable this functionality. Comment out the Location/server-info section from Apache configuration file httpd.conf (for Redhat, Centos, Fedora) or apache2.conf (for Debian, Ubuntu).