Detections
Analytics

1.20 IIST-SI-000228

Information

Non-ASCII characters in URLs must be prohibited by any IIS 10.0 website.

GROUP ID: V-218756
RULE ID: SV-218756r961152

Setting limits on web requests ensures availability of web services and mitigates the risk of buffer overflow type attacks. The allow high-bit characters Request Filter enables rejection of requests containing non-ASCII characters.

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.

Uncheck the 'Allow high-bit characters' check box.

See Also

https://workbench.cisecurity.org/benchmarks/23698

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5(1), CAT|II, CCI|CCI-001094, Rule-ID|SV-218756r961152_rule, STIG-ID|IIST-SI-000228, Vuln-ID|V-218756

Plugin: Windows

Control ID: c321a269b706acd8d3dab31948f033c6d09e203d50d5d4c2cfdb6065b79cbfc8