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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-6239	DTBI015	SV-45417r1_rule		Medium

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.

STIG	Date
Microsoft Internet Explorer 10 Security Technical Implementation Guide	2016-06-24

Details

Check Text ( C-42768r1_chk )
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.

Check Text ( C-42768r1_chk )

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 Text (F-38815r1_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".