STIGQter: STIG Summary: Microsoft IIS 8.5 Site Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

Double encoded URL requests must be prohibited by any IIS 8.5 website.

DISA Rule

SV-214468r508659_rule

Vulnerability Number

V-214468

Group Title

SRG-APP-000246-WSR-000149

Rule Version

IISW-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 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 double escaping" 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 the "Allow double escaping" check box is checked, this is a finding.

Vulnerability Number

V-214468

Documentable

False

Rule Version

IISW-SI-000229

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

Check Content Reference

M

Target Key

4001

Comments