AS24-U1-000520 - The Apache web server must generate a session ID using as much of the character set as possible to reduce the risk of brute force.


Generating a session identifier (ID) that is not easily guessed through brute force is essential to deter several types of session attacks. By knowing the session ID, an attacker can hijack a user session that has already been user-authenticated by the hosted application. The attacker does not need to guess user identifiers and passwords or have a secure token since the user session has already been authenticated.

By generating session IDs that contain as much of the character set as possible, i.e., A-Z, a-z, and 0-9, the session ID becomes exponentially harder to guess.

Satisfies: SRG-APP-000223-WSR-000145, SRG-APP-000224-WSR-000135, SRG-APP-000224-WSR-000136, SRG-APP-000224-WSR-000138


Determine the location of the 'HTTPD_ROOT' directory and the 'httpd.conf' file:

# apachectl -V | egrep -i 'httpd_root|server_config_file'
-D HTTPD_ROOT='/etc/httpd'
-D SERVER_CONFIG_FILE='conf/httpd.conf'

Load the 'unique_id_module'.

Example: LoadModule unique_id_module modules/

Restart Apache: apachectl restart

See Also

Item Details


References: 800-53|SC-23(3), CAT|I, CCI|CCI-001188, CCI|CCI-001664, Rule-ID|SV-214253r881438_rule, STIG-ID|AS24-U1-000520, STIG-Legacy|SV-102777, STIG-Legacy|V-92689, Vuln-ID|V-214253

Plugin: Unix

Control ID: d8f76a7c3bec8fd4f4593dd3ef1f11a7b0bd0734fb3e86bf8476496135c6eefe