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

Unlisted file extensions in URL requests must be filtered by any IIS 10.0 website.

DISA Rule

SV-218758r695276_rule

Vulnerability Number

V-218758

Group Title

SRG-APP-000246-WSR-000149

Rule Version

IIST-SI-000230

Severity

CAT II

CCI(s)

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 review.

Double-click the "Request Filtering" icon.

Click "Edit Feature Settings" in the "Actions" pane.

Uncheck the "Allow unlisted file extensions" check box.

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.

Double-click the "Request Filtering" icon.

Click "Edit Feature Settings" in the "Actions" pane.

If the "Allow unlisted file name extensions" check box is checked, this is a finding.

Note: If this IIS 10.0 installation is supporting Microsoft Exchange, and not otherwise hosting any content, this requirement is Not Applicable.

Note: If this IIS 10.0 installation is supporting Splunk, this requirement is Not Applicable.

Vulnerability Number

V-218758

Documentable

False

Rule Version

IIST-SI-000230

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.

Double-click the "Request Filtering" icon.

Click "Edit Feature Settings" in the "Actions" pane.

If the "Allow unlisted file name extensions" check box is checked, this is a finding.

Note: If this IIS 10.0 installation is supporting Microsoft Exchange, and not otherwise hosting any content, this requirement is Not Applicable.

Note: If this IIS 10.0 installation is supporting Splunk, this requirement is Not Applicable.

Check Content Reference

M

Target Key

4051

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