Prevent bypassing SmartScreen Filter warnings must be enabled.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-223039	SRG-APP-000278	DTBI1060-IE11	SV-223039r879664_rule	2023-12-01	2

Description
This policy setting determines whether the user can bypass warnings from SmartScreen Filter. SmartScreen Filter prevents the user from browsing to or downloading from sites that are known to host malicious content. SmartScreen Filter also prevents the execution of files that are known to be malicious. If you enable this policy setting, SmartScreen Filter warnings block the user. If you disable or do not configure this policy setting, the user can bypass SmartScreen Filter warnings.

Description

This policy setting determines whether the user can bypass warnings from SmartScreen Filter. SmartScreen Filter prevents the user from browsing to or downloading from sites that are known to host malicious content. SmartScreen Filter also prevents the execution of files that are known to be malicious. If you enable this policy setting, SmartScreen Filter warnings block the user. If you disable or do not configure this policy setting, the user can bypass SmartScreen Filter warnings.

ℹ️ Check
If the system is on the SIPRNet, this requirement is NA. The policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Internet Explorer >> ”Prevent bypassing SmartScreen Filter warnings” must be ”Enabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Internet Explorer\PhishingFilter. Criteria: If the value "PreventOverride" is REG_DWORD = 1, this is not a finding.

ℹ️ Check

If the system is on the SIPRNet, this requirement is NA. The policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Internet Explorer >> ”Prevent bypassing SmartScreen Filter warnings” must be ”Enabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Internet Explorer\PhishingFilter. Criteria: If the value "PreventOverride" is REG_DWORD = 1, this is not a finding.

✔️ Fix
If the system is on the SIPRNet, this requirement is NA. Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Internet Explorer >> ”Prevent bypassing SmartScreen Filter warnings” to ”Enabled”.