The web server must display a default hosted application web page, not a directory listing, when a requested web page cannot be found.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-206411	SRG-APP-000266-WSR-000142	SV-206411r397843_rule		Medium

Description
The goal is to completely control the web user's experience in navigating any portion of the web document root directories. Ensuring all web content directories have at least the equivalent of an index.html file is a significant factor to accomplish this end. Enumeration techniques, such as URL parameter manipulation, rely upon being able to obtain information about the web server's directory structure by locating directories without default pages. In the scenario, the web server will display to the user a listing of the files in the directory being accessed. By having a default hosted application web page, the anonymous web user will not obtain directory browsing information or an error message that reveals the server type and version.

Description

The goal is to completely control the web user's experience in navigating any portion of the web document root directories. Ensuring all web content directories have at least the equivalent of an index.html file is a significant factor to accomplish this end. Enumeration techniques, such as URL parameter manipulation, rely upon being able to obtain information about the web server's directory structure by locating directories without default pages. In the scenario, the web server will display to the user a listing of the files in the directory being accessed. By having a default hosted application web page, the anonymous web user will not obtain directory browsing information or an error message that reveals the server type and version.

STIG	Date
Web Server Security Requirements Guide	2022-09-20

Details

Check Text ( C-6672r377825_chk )
Review the web server documentation and deployed configuration to locate all the web document directories. Verify that each web document directory contains a default hosted application web page that can be used by the web server in the event a web page cannot be found. If a document directory does not contain a default web page, this is a finding.

Fix Text (F-6672r377826_fix)
Place a default web page in every web document directory.