The production web-site must configure the Global .NET Trust Level.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-26034	WA000-WI6200	SV-46354r3_rule		Medium

Description
An application's trust level determines the permissions granted by the ASP.NET Code Access Security (CAS) policy. An application with full trust permissions may access all resource types on a server and perform privileged operations, while applications running with partial trust have varying levels of operating permissions and access to resources. The CAS determines the permissions granted to the application on the server. Setting a level of trust compatible with the applications will limit the potential harm a compromised application could cause to a system.

Description

An application's trust level determines the permissions granted by the ASP.NET Code Access Security (CAS) policy. An application with full trust permissions may access all resource types on a server and perform privileged operations, while applications running with partial trust have varying levels of operating permissions and access to resources. The CAS determines the permissions granted to the application on the server. Setting a level of trust compatible with the applications will limit the potential harm a compromised application could cause to a system.

STIG	Date
IIS 7.0 Server STIG	2019-03-22

Details

Check Text ( C-32886r7_chk )
Note: If the server being reviewed is a non-production website, this is Not Applicable. Note: Setting a web application Trust Level to MEDIUM may deny some application permissions. If compatibility issues with applications require trust level to be less than "Medium", this check can be downgraded to a Cat III with supporting documentation from the Authorizing Official (AO). 1. Open the IIS Manager. 2. Click the site name under review. 3. Double-click the ".NET Trust Level" icon. 4. If the .NET Trust level is not set to "Medium" or less, this is a finding.

Check Text ( C-32886r7_chk )

Note: If the server being reviewed is a non-production website, this is Not Applicable.
Note: Setting a web application Trust Level to MEDIUM may deny some application permissions. If compatibility issues with applications require trust level to be less than "Medium", this check can be downgraded to a Cat III with supporting documentation from the Authorizing Official (AO).

1. Open the IIS Manager.
2. Click the site name under review.
3. Double-click the ".NET Trust Level" icon.
4. If the .NET Trust level is not set to "Medium" or less, this is a finding.

Fix Text (F-29034r2_fix)
1. Open the IIS Manager. 2. Click the site name under review. 3. Double-click the ".NET Trust Level" icon. 4. Set the .NET Trust level to "Medium" or less and click "Apply".