STIGQter: STIG Summary: Microsoft IIS 10.0 Server Security Technical Implementation Guide Version: 3 Release: 7 Benchmark Date: 01 Apr 2026:

The IIS 10.0 web server must accept only system-generated session identifiers.

DISA Rule

SV-218805r1067583_rule

Vulnerability Number

V-218805

Group Title

SRG-APP-000223-WSR-000145

Rule Version

IIST-SV-000135

Severity

CAT II

CCI(s)

• CCI-001664 - Recognize only session identifiers that are system-generated.

Weight

10

Fix Recommendation

Open the IIS 10.0 Manager.

Click the IIS 10.0 web server name.

Under the "ASP.NET" section, select "Session State".

Under "Cookie Settings", select the "Use Cookies" mode from the "Mode:" drop-down list.

Under "Time-out (in minutes)", enter a value of "15 or less".

Check Contents

Note: If ASP.NET is not installed, this is Not Applicable.

Open the IIS 10.0 Manager.

Click the IIS 10.0 web server name.

Under the "ASP.NET" section, select "Session State".

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

Under "Time-out (in minutes)", verify a maximum of 15 minutes is entered.

If the "Use Cookies" mode is selected and Time-out (in minutes) is configured for "15 minutes" (or less), this is not a finding.

Alternative method:

Click the site name.

Select "Configuration Editor" under the "Management" section.

From the "Section:" drop-down list at the top of the configuration editor, locate "system.web/sessionState".

Verify the "cookieless" is set to "UseCookies".

If the "cookieless" is not set to "UseCookies", this is a finding.

Note: If IIS 10.0 server/site is used only for system-to-system maintenance, does not allow users to connect to interface, and is restricted to specific system IPs, this is Not Applicable.

Vulnerability Number

V-218805

Documentable

False

Rule Version

IIST-SV-000135

Severity Override Guidance

Note: If ASP.NET is not installed, this is Not Applicable.

Open the IIS 10.0 Manager.

Click the IIS 10.0 web server name.

Under the "ASP.NET" section, select "Session State".

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

Under "Time-out (in minutes)", verify a maximum of 15 minutes is entered.

If the "Use Cookies" mode is selected and Time-out (in minutes) is configured for "15 minutes" (or less), this is not a finding.

Alternative method:

Click the site name.

Select "Configuration Editor" under the "Management" section.

From the "Section:" drop-down list at the top of the configuration editor, locate "system.web/sessionState".

Verify the "cookieless" is set to "UseCookies".

If the "cookieless" is not set to "UseCookies", this is a finding.

Note: If IIS 10.0 server/site is used only for system-to-system maintenance, does not allow users to connect to interface, and is restricted to specific system IPs, this is Not Applicable.

Check Content Reference

M

Target Key

4052