Microsoft IIS 10.0 Site STIG Version Comparison

There are 11 differences between versions v2 r11 (April 2, 2025) (the "left" version) and v2 r13 (Oct. 1, 2025) (the "right" version).

Check IIST-SI-000270 was added to the benchmark in the "right" version.

This check's original form is available here.

Title

HTTPAPI Server version must be removed from the HTTP Response Header information.

Check Content

Note: If the server is hosting WSUS, this is not applicable. Open Registry Editor. Navigate to "HKLM\System\CurrentControlSet\Services\HTTP\Parameters". Verify "DisableServerHeader” is set to "2". If REG_DWORD DisableServerHeader is not set to "2", this is a finding. If the system administrator can show that Server Version information has been removed via other means, such as using a rewrite outbound rule, this is not a finding.

Discussion

HTTP Response Headers contain information that could enable an attacker to gain access to an information system. Failure to prevent the sending of certain HTTP Response Header information to remote requesters exposes internal configuration information to potential attackers.

Fix

Navigate to "HKLM\System\CurrentControlSet\Services\HTTP\Parameters". Create REG_DWORD "DisableServerHeader” and set it to "2". Note: This can be performed multiple ways; this is an example.