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

Double encoded URL requests must be prohibited by any IIS 10.0 website.

DISA Rule

SV-218757r558649_rule

Vulnerability Number

V-218757

Group Title

SRG-APP-000246-WSR-000149

Rule Version

IIST-SI-000229

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 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 double escaping" 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 double escaping" check box is checked, this is a finding.

Vulnerability Number

V-218757

Documentable

False

Rule Version

IIST-SI-000229

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 double escaping" check box is checked, this is a finding.

Check Content Reference

M

Target Key

4051

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