The IIS 8.5 web server must use cookies to track session state.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-76725	IISW-SV-000134	SV-91421r2_rule		Medium

Description
Cookies are used to exchange data between the web server and the client. Cookies, such as a session cookie, may contain session information and user credentials used to maintain a persistent connection between the user and the hosted application since HTTP/HTTPS is a stateless protocol. Cookies associate session information with client information for the duration of a user’s connection to a website. Using cookies is a more efficient way to track session state than any of the methods that do not use cookies because cookies do not require any redirection.

Description

Cookies are used to exchange data between the web server and the client. Cookies, such as a session cookie, may contain session information and user credentials used to maintain a persistent connection between the user and the hosted application since HTTP/HTTPS is a stateless protocol. Cookies associate session information with client information for the duration of a user’s connection to a website. Using cookies is a more efficient way to track session state than any of the methods that do not use cookies because cookies do not require any redirection.

STIG	Date
IIS 8.5 Server Security Technical Implementation Guide	2018-01-03

Details

Check Text ( C-76381r2_chk )
Open the IIS 8.5 Manager. Click the IIS 8.5 web server name. Under "ASP.Net", double-click on the "Session State" icon. Under "Cookie Settings", verify the "Mode" has "Use Cookies" selected from the drop-down list. Verify the "Regenerate expired session ID" check box is selected. If the "Cookie Settings" "Mode" is not set to "Use Cookies" and the "Regenerate expired session ID" check box is not selected, this is a finding.

Check Text ( C-76381r2_chk )

Open the IIS 8.5 Manager.

Click the IIS 8.5 web server name.

Under "ASP.Net", double-click on the "Session State" icon.

Under "Cookie Settings", verify the "Mode" has "Use Cookies" selected from the drop-down list.

Verify the "Regenerate expired session ID" check box is selected.

If the "Cookie Settings" "Mode" is not set to "Use Cookies" and the "Regenerate expired session ID" check box is not selected, this is a finding.

Fix Text (F-83421r2_fix)
Open the IIS 8.5 Manager. Click the IIS 8.5 web server name. Under "ASP.Net", double-click on the "Session State" icon. Under "Cookie Settings", select "Use Cookies” from the "Mode" drop-down list. Select the "Regenerate expired session ID" check box. Click "Apply" in the "Actions" pane.