The Internet Explorer warning about certificate address mismatch must be enforced.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-223015	SRG-APP-000516	DTBI015-IE11	SV-223015r879887_rule	2023-12-01	2

Description
This parameter warns users if the certificate being presented by the website is invalid. Since server certificates are used to validate the identity of the web server it is critical to warn the user of a potential issue with the certificate being presented by the web server. This setting aids to prevent spoofing attacks.

ℹ️ Check
The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page 'Turn on certificate address mismatch warning' must be 'Enabled'. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings Criteria: If the value "WarnOnBadCertRecving" is REG_DWORD = 1, this is not a finding.

ℹ️ Check

The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page 'Turn on certificate address mismatch warning' must be 'Enabled'. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings Criteria: If the value "WarnOnBadCertRecving" is REG_DWORD = 1, this is not a finding.

✔️ Fix
Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page 'Turn on certificate address mismatch warning' to 'Enabled'.