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The IIS 8.5 website must be configured to limit the maxURL.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-214464 | IISW-SI-000225 | SV-214464r508659_rule | Medium |
| Description |
|---|
| 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. |
| STIG | Date |
|---|---|
| Microsoft IIS 8.5 Site Security Technical Implementation Guide | 2020-09-25 |
Details
| Check Text ( C-15673r310596_chk ) |
|---|
| 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 "maxUrl" value is not set to "4096" or less, this is a finding. |
| Fix Text (F-15671r310597_fix) |
|---|
| 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. |