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V-223015

CAT II (Medium)

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

Rule ID

SV-223015r961863_rule

STIG

Microsoft Internet Explorer 11 Security Technical Implementation Guide

Version

V2R7

CCIs

CCI-000366

Discussion

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.

Check Content

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

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'.