The Apache web server must perform RFC 5280-compliant certification path validation.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-214286	AS24-U2-000380	SV-214286r881487_rule		Medium

Description

A certificate's certification path is the path from the end entity certificate to a trusted root certification authority (CA). Certification path validation is necessary for a relying party to make an informed decision regarding acceptance of an end entity certificate. Certification path validation includes checks such as certificate issuer trust, time validity, and revocation status for each certificate in the certification path. Revocation status information for CA and subject certificates in a certification path is commonly provided via certificate revocation lists (CRLs) or online certificate status protocol (OCSP) responses.

STIG	Date
Apache Server 2.4 UNIX Site Security Technical Implementation Guide	2023-06-06

Details

Check Text ( C-15499r881485_chk )

In a command line, run "httpd -M | grep -i ssl_module". If the "ssl_module" is not enabled, this is a finding. Determine the location of the "HTTPD_ROOT" directory and the "ssl.conf" file: # apachectl -V | egrep -i 'httpd_root|server_config_file' -D HTTPD_ROOT="/etc/httpd" Review <'HTTPD_ROOT'>/conf.d/ssl.conf Verify "SSLVerifyClient" is set to "require": SSLVerifyClient require Verify "SSLVerifyDepth" is set to a number greater than "0": SSLVerifyDepth 1 If "SSLVerifyClient" is not set to "require" or "SSLVerifyDepth" is not set to a number greater than "0", this is a finding.

Fix Text (F-15497r881486_fix)
Determine the location of the "HTTPD_ROOT" directory and the "ssl.conf" file: # apachectl -V | egrep -i 'httpd_root|server_config_file' -D HTTPD_ROOT="/etc/httpd" Edit <'HTTPD_ROOT'>/conf.d/ssl.conf Set "SSLVerifyClient" to "require". Set "SSLVerifyDepth" to "1". SSLVerifyDepth 1 For more information: https://httpd.apache.org/docs/current/mod/ssl_module.html