Free DISA STIG and SRG Library | Vaulted

V-214228

The Apache web server must limit the number of allowed simultaneous session requests.

Finding ID
AS24-U1-000010
Rule ID
SV-214228r612240_rule
Severity
Cat II
CCE
(None)
Group Title
SRG-APP-000001-WSR-000001
CCI
CCI-000054
Target Key
(None)
Documentable
No
Discussion

Apache web server management includes the ability to control the number of users and user sessions that utilize an Apache web server. Limiting the number of allowed users and sessions per user is helpful in limiting risks related to several types of denial-of-service (DOS) attacks. Although there is some latitude concerning the settings, they should follow DoD-recommended values and be configurable to allow for future DoD direction. While the DoD will specify recommended values, the values can be adjusted to accommodate the operational requirements of a given system.

Fix Text

Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" file: # httpd -V | egrep -i 'httpd_root|server_config_file' -D HTTPD_ROOT="/etc/httpd" -D SERVER_CONFIG_FILE="conf/httpd.conf" Set the "KeepAlive" directive to a value of "on"; add the directive if it does not exist. Set the "MaxKeepAliveRequests" directive to a value of "100" or greater; add the directive if it does not exist. Restart Apache: apachectl restart

Check Content

Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" file: # httpd -V | egrep -i 'httpd_root|server_config_file' -D HTTPD_ROOT="/etc/httpd" -D SERVER_CONFIG_FILE="conf/httpd.conf" Search for the directives "KeepAlive" and "MaxKeepAliveRequests" in the "httpd.conf" file: # cat /<path_to_file>/httpd.conf | grep -i "keepalive" KeepAlive On MaxKeepAliveRequests 100 If the value of "KeepAlive" is set to "off" or does not exist, this is a finding. If the value of "MaxKeepAliveRequests" is set to a value less than "100" or does not exist, this is a finding.