Details

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.

Supportive Information

The following resource is also helpful.

• https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_IIS_10-0_Y20M10_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: System and Communications Protection.This control applies to the following type of system Windows.

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

Source

• Tenable.com/audits