The production web-site must utilize SHA2 encryption for Machine Key.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-26026	WA000-WI6180 IIS7	SV-33314r3_rule		Medium

Description
The Machine Key element of the ASP.NET web.config specifies the algorithm and keys that ASP.NET will use for encryption. The Machine Key feature can be managed to specify hashing and encryption settings for application services such as view state, forms authentication, membership and roles, and anonymous identification. Ensuring a strong encryption method can mitigate the risk of data tampering in crucial functional areas such as forms authentication cookies or view state.

Description

The Machine Key element of the ASP.NET web.config specifies the algorithm and keys that ASP.NET will use for encryption. The Machine Key feature can be managed to specify hashing and encryption settings for application services such as view state, forms authentication, membership and roles, and anonymous identification. Ensuring a strong encryption method can mitigate the risk of data tampering in crucial functional areas such as forms authentication cookies or view state.

STIG	Date
IIS 7.0 WEB SITE STIG	2017-12-21

Details

Check Text ( C-32882r4_chk )
1. Open the "IIS Manager". 2. Click the site name under review. 3. Double-click the "Machine Key" in the web site "Home Pane". 4. Ensure "SHA2" is selected for the "Validation method". If not, this is a finding.

Fix Text (F-29031r3_fix)
1. Open the "IIS Manager". 2. Click the site name under review. 3. Double-click the "Machine Key" in the web site "Home Pane". 4. Set the "Validation method" to "SHA2".