Title

Prevent bypassing SmartScreen Filter warnings about files that are not commonly downloaded from the internet must be enabled. (Cat II impact)

Discussion

This policy setting determines whether the user can bypass warnings from SmartScreen Filter. SmartScreen Filter warns the user about executable files that Internet Explorer users do not commonly download from the internet. 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.

Check Content

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 about files that are not commonly downloaded from the internet” 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 "PreventOverrideAppRepUnknown" is REG_DWORD = 1, this is not a finding.

Fix Text

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 about files that are not commonly downloaded from the internet” to ”Enabled”.

Additional Identifiers

Rule ID: SV-223040r879629_rule

Vulnerability ID: V-223040

Group Title: SRG-APP-000209

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.