IIST-SI-000226 - The IIS 10.0 website must be configured to limit the size of web requests.

Information

By setting limits on web requests, it ensures availability of web services and mitigates the risk of buffer overflow type attacks. The maxAllowedContentLength Request Filter limits the number of bytes the server will accept in a request.

Solution

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 'maxAllowedContentLength' value to '30000000' or less.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_IIS_10-0_Y22M01_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5(1), CAT|II, CCI|CCI-001094, Rule-ID|SV-218754r558649_rule, STIG-ID|IIST-SI-000226, STIG-Legacy|SV-109333, STIG-Legacy|V-100229, Vuln-ID|V-218754

Plugin: Windows

Control ID: fc998aec7cc617ffe3686cb40ee597f1b22d6259d45c3e0bfafa7d76ee282738