STIGQter: STIG Summary: Microsoft IIS 8.5 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 8.5 website.

DISA Rule

SV-214469r695293_rule

Vulnerability Number

V-214469

Group Title

SRG-APP-000246-WSR-000149

Rule Version

IISW-SI-000230

Severity

CAT II

CCI(s)

• CCI-001094 - The information system restricts the ability of individuals to launch organization-defined denial of service attacks against other information systems.

Weight

10

Fix Recommendation

Follow the procedures below for each site hosted on the IIS 8.5 web server:

Open the IIS 8.5 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 8.5 web server:

Open the IIS 8.5 Manager.

Click on the site name.

Double-click the "Request Filtering" icon.

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

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

Note: If this IIS 8.5 installation is supporting Microsoft Exchange, and not otherwise hosting any content, this requirement is Not Applicable.

Note: If this IIS 8.5 installation is supporting Splunk, this requirement is Not Applicable.

Vulnerability Number

V-214469

Documentable

False

Rule Version

IISW-SI-000230

Severity Override Guidance

Follow the procedures below for each site hosted on the IIS 8.5 web server:

Open the IIS 8.5 Manager.

Click on the site name.

Double-click the "Request Filtering" icon.

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

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

Note: If this IIS 8.5 installation is supporting Microsoft Exchange, and not otherwise hosting any content, this requirement is Not Applicable.

Note: If this IIS 8.5 installation is supporting Splunk, this requirement is Not Applicable.

Check Content Reference

M

Target Key

4001

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