OHS must have the MaxClients directive defined to limit the number of allowed simultaneous requests.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-64127	OH12-1X-000003	SV-78617r1_rule		Medium

Description
Web server management includes the ability to control the number of users and user sessions that utilize a 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 attacks. Although there is some latitude concerning the settings themselves, the settings should follow DoD-recommended values, but the settings should be configurable to allow for future DoD direction. While the DoD will specify recommended values, the values can be adjusted to accommodate the operational requirement of a given system.

Description

Web server management includes the ability to control the number of users and user sessions that utilize a 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 attacks. Although there is some latitude concerning the settings themselves, the settings should follow DoD-recommended values, but the settings should be configurable to allow for future DoD direction. While the DoD will specify recommended values, the values can be adjusted to accommodate the operational requirement of a given system.

STIG	Date
Oracle HTTP Server 12.1.3 Security Technical Implementation Guide	2019-12-12

Details

Check Text ( C-64877r1_chk )
1. Open the $DOMAIN_HOME/config/fmwconfig/components/OHS//httpd.conf file with an editor. 2. Search for the "MaxClients" directive within "" directive at the OHS server configuration scope. 3. If "MaxClients" is omitted or set greater than "2000", this is a finding. Note: This vulnerability can be documented locally with the ISSM/ISSO if the site has operational reasons for the use of a higher value. If the site has this documentation, this should be marked as not a finding.

Check Text ( C-64877r1_chk )

1. Open the $DOMAIN_HOME/config/fmwconfig/components/OHS//httpd.conf file with an editor.

2. Search for the "MaxClients" directive within "" directive at the OHS server configuration scope.

3. If "MaxClients" is omitted or set greater than "2000", this is a finding.

Note: This vulnerability can be documented locally with the ISSM/ISSO if the site has operational reasons for the use of a higher value. If the site has this documentation, this should be marked as not a finding.

Fix Text (F-70055r1_fix)
1. Open $DOMAIN_HOME/config/fmwconfig/components/OHS//httpd.conf with an editor. 2. Search for the "MaxClients" directive within "" directive at the OHS server configuration scope. 3. Within the "" directive, set the "MaxClients" directive to "2000" or less, add the directive if it does not exist. Note: This vulnerability can be documented locally with the ISSM/ISSO if the site has operational reasons for the use of a higher value.

Fix Text (F-70055r1_fix)

1. Open $DOMAIN_HOME/config/fmwconfig/components/OHS//httpd.conf with an editor.

2. Search for the "MaxClients" directive within "" directive at the OHS server configuration scope.

3. Within the "" directive, set the "MaxClients" directive to "2000" or less, add the directive if it does not exist.

Note: This vulnerability can be documented locally with the ISSM/ISSO if the site has operational reasons for the use of a higher value.