Each IIS 8.5 website must be assigned a default host header.

From IIS 8.5 Site Security Technical Implementation Guide

Associated with: CCI-000382

SV-91503r1_rule Each IIS 8.5 website must be assigned a default host header.

Vulnerability discussion

The web server must be configured to listen on a specified IP address and port. Without specifying an IP address and port for the web server to utilize, the web server will listen on all IP addresses available to the hosting server. If the web server has multiple IP addresses, i.e., a management IP address, the web server will also accept connections on the management IP address.Accessing the hosted application through an IP address normally used for non-application functions opens the possibility of user access to resources, utilities, files, ports, and protocols that are protected on the desired application IP address.

Check content

Follow the procedures below for each site hosted on the IIS 8.5 web server: Open the IIS 8.5 Manager. Right-click on the site name under review. Select “Edit Bindings”. Verify there are hostname entries and unique IP addresses assigned to port 80 for HTTP and port 443 for HTTPS. If both hostname entries and unique IP addresses are not configure to port 80 for HTTP and port 443 for HTTPS, this is a finding.

Fix text

Follow the procedures below for each site hosted on the IIS 8.5 web server: Open the IIS 8.5 Manager. Right-click on the site name under review. Select “Edit Bindings”. Assign hostname entries and unique IP addresses to port 80 for HTTP and port 443 for HTTPS. Click "OK". Select "Apply" from the "Actions" pane.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.