UCF STIG Viewer Logo

The IIS 10.0 websites Maximum Query String limit must be configured.


Overview

Finding ID Version Rule ID IA Controls Severity
V-218755 IIST-SI-000227 SV-218755r558649_rule Medium
Description
Setting limits on web requests helps to ensure availability of web services and may also help mitigate the risk of buffer overflow type attacks. The Maximum Query String Request Filter describes the upper limit on allowable query string lengths. Upon exceeding the configured value, IIS will generate a Status Code 404.15.
STIG Date
Microsoft IIS 10.0 Site Security Technical Implementation Guide 2022-06-23

Details

Check Text ( C-20228r311163_chk )
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 "Maximum Query String" value is not set to "2048" or less, this is a finding.
Fix Text (F-20226r311164_fix)
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.

Set the "Maximum Query String" value to "2048" or less.