The Apache web server must generate unique session identifiers that cannot be reliably reproduced.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-92539	AS24-W2-000500	SV-102627r1_rule		Medium

Description
Communication between a client and the web server is done using the HTTP protocol, but HTTP is a stateless protocol. To maintain a connection or session, a web server will generate a session identifier (ID) for each client session when the session is initiated. The session ID allows the web server to track a user session and, in many cases, the user, if the user previously logged on to a hosted application. By being able to guess session IDs, an attacker can easily perform a man-in-the-middle attack. To truly generate random session identifiers that cannot be reproduced, the web server session ID generator, when used twice with the same input criteria, must generate an unrelated random ID. The session ID generator also needs to be a FIPS 140-2 approved generator. Satisfies: SRG-APP-000224-WSR-000136, SRG-APP-000224-WSR-000137

Description

Communication between a client and the web server is done using the HTTP protocol, but HTTP is a stateless protocol. To maintain a connection or session, a web server will generate a session identifier (ID) for each client session when the session is initiated. The session ID allows the web server to track a user session and, in many cases, the user, if the user previously logged on to a hosted application. By being able to guess session IDs, an attacker can easily perform a man-in-the-middle attack. To truly generate random session identifiers that cannot be reproduced, the web server session ID generator, when used twice with the same input criteria, must generate an unrelated random ID. The session ID generator also needs to be a FIPS 140-2 approved generator. Satisfies: SRG-APP-000224-WSR-000136, SRG-APP-000224-WSR-000137

STIG	Date
Apache Server 2.4 Windows Site Security Technical Implementation Guide	2019-12-19

Details

Check Text ( C-91843r1_chk )
Review the <'INSTALLED PATH'>\conf\httpd.conf file. Verify the "mod_unique_id" is loaded. If it does not exist, this is a finding.

Fix Text (F-98781r1_fix)
Edit the <'INSTALLED PATH'>\conf\httpd.conf file and load the "mod_unique_id" module. Restart Apache.