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The IE warning about certificate address mismatch must be enforced.


Overview

Finding ID Version Rule ID IA Controls Severity
V-6239 DTBI015 SV-43156r1_rule ECSC-1 Medium
Description
This parameter warns users if the certificate being presented by the web site 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
Internet Explorer 9 Security Technical Implementation Guide 2015-06-30

Details

Check Text ( C-41144r2_chk )
The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page "Turn on Warn about Certificate Address Mismatch" 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-36692r2_fix)
Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page "Turn on Warn about Certificate Address Mismatch" to "Enabled".