STIGQter: STIG Summary: Microsoft IIS 10.0 Site Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

The IIS 10.0 website must generate unique session identifiers that cannot be reliably reproduced.

DISA Rule

SV-218751r558649_rule

Vulnerability Number

V-218751

Group Title

SRG-APP-000224-WSR-000136

Rule Version

IIST-SI-000223

Severity

CAT II

CCI(s)

• CCI-001188 - The information system generates unique session identifiers for each session with organization-defined randomness requirements.

Weight

10

Fix Recommendation

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Click the site name.

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

Under "Session State" Mode Settings, select the "In Process" mode.

Check Contents

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Click the site name.

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

Under "Session State" Mode Settings, verify the "In Process" mode is selected.

If the "In Process" mode is selected, 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 "mode" reflects "InProc".

If the "mode" is not set to "InProc", this is a finding.

If the system being reviewed is part of a Web Farm, interview the System Administrator to ensure Session State Tracking is enabled via a SQL server, or other means. If Session State Tracking is enabled on the Web Farm, this is not a finding.

Vulnerability Number

V-218751

Documentable

False

Rule Version

IIST-SI-000223

Severity Override Guidance

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Click the site name.

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

Under "Session State" Mode Settings, verify the "In Process" mode is selected.

If the "In Process" mode is selected, 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 "mode" reflects "InProc".

If the "mode" is not set to "InProc", this is a finding.

If the system being reviewed is part of a Web Farm, interview the System Administrator to ensure Session State Tracking is enabled via a SQL server, or other means. If Session State Tracking is enabled on the Web Farm, this is not a finding.

Check Content Reference

M

Target Key

4051

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