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Windows Server 2016 must be configured to block untrusted fonts from loading.


Overview

Finding ID Version Rule ID IA Controls Severity
V-73535 WN16-CC-000200 SV-88189r1_rule Medium
Description
Attackers may use fonts that include malicious code to compromise a system. This setting will prevent untrusted fonts, processed by the Graphics Device Interface (GDI), from loading if installed outside of the %windir%/Fonts directory.
STIG Date
Windows Server 2016 Security Technical Implementation Guide 2017-05-18

Details

Check Text ( C-73609r1_chk )
If the following registry value does not exist or is not configured as specified, this is a finding.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\MitigationOptions\

Value Name: MitigationOptions_FontBocking

Type: REG_SZ
Value: 1000000000000 (1 with 12 zeros)
Fix Text (F-79977r1_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Mitigation Options >> "Untrusted Font Blocking" to "Enabled" with "Block untrusted fonts and log events" selected in "Mitigation Options".