Prevent ignoring certificate errors option must be enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-64717	DTBI1075-IE11	SV-79207r1_rule		Medium

Description
This policy setting prevents the user from ignoring Secure Sockets Layer/Transport Layer Security (SSL/TLS) certificate errors that interrupt browsing (such as “expired”, “revoked”, or “name mismatch” errors) in Internet Explorer. If you enable this policy setting, the user cannot continue browsing. If you disable or do not configure this policy setting, the user can choose to ignore certificate errors and continue browsing.

Description

This policy setting prevents the user from ignoring Secure Sockets Layer/Transport Layer Security (SSL/TLS) certificate errors that interrupt browsing (such as “expired”, “revoked”, or “name mismatch” errors) in Internet Explorer. If you enable this policy setting, the user cannot continue browsing. If you disable or do not configure this policy setting, the user can choose to ignore certificate errors and continue browsing.

STIG	Date
Microsoft Internet Explorer 11 Security Technical Implementation Guide	2017-01-04

Details

Check Text ( C-65459r2_chk )
The policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Internet Explorer >> Internet Control Panel >> ”Prevent ignoring certificate errors” 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 "PreventIgnoreCertErrors" is REG_DWORD = 1, this is not a finding.

Check Text ( C-65459r2_chk )

The policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Internet Explorer >> Internet Control Panel >> ”Prevent ignoring certificate errors” 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 "PreventIgnoreCertErrors" is REG_DWORD = 1, this is not a finding.

Fix Text (F-70647r1_fix)
Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Internet Explorer >> Internet Control Panel >> ”Prevent ignoring certificate errors” to ”Enabled”.