IISW-SI-000225 - The IIS 8.5 website must be configured to limit the maxURL.

Information

Request filtering replaces URLScan in IIS, enabling administrators to create a more granular rule set with which to allow or reject inbound web content. By setting limits on web requests, it helps to ensure availability of web services and may also help mitigate the risk of buffer overflow type attacks. The MaxURL Request Filter limits the number of bytes the server will accept in a URL.

Solution

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

Click the site name under review.

Double-click the 'Request Filtering' icon.

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

Set the 'maxURL' value to '4096' or less.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_IIS_8-5_Y22M01_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5(1), CAT|II, CCI|CCI-001094, Rule-ID|SV-214464r508659_rule, STIG-ID|IISW-SI-000225, STIG-Legacy|SV-91513, STIG-Legacy|V-76817, Vuln-ID|V-214464

Plugin: Windows

Control ID: bfcafd6562f2c9500f145e937162a5c5ac0c4ac181015f9137868322e5c45d9e