The Enhanced Mitigation Experience Toolkit (EMET) system-wide Address Space Layout Randomization (ASLR) must be enabled and configured to Application Opt In.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63401	WN10-EM-000025	SV-77891r2_rule		Medium

Description
Attackers are constantly looking for vulnerabilities in systems and applications. The Enhanced Mitigation Experience Toolkit can enable several mechanisms, such as Data Execution Prevention (DEP), Address Space Layout Randomization (ASLR), and Structured Exception Handler Overwrite Protection (SEHOP) on the system and applications adding additional levels of protection.

STIG	Date
Windows 10 Security Technical Implementation Guide	2017-02-21

Details

Check Text ( C-64149r3_chk )
This is applicable to unclassified systems, for other systems this is NA. If EMET has not been installed and DEP and SEHOP are configured as required in V-68845 and V-68849, this is NA. 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\EMET\SysSettings\ Value Name: ASLR Value Type: REG_DWORD Value: 3

Check Text ( C-64149r3_chk )

This is applicable to unclassified systems, for other systems this is NA.

If EMET has not been installed and DEP and SEHOP are configured as required in V-68845 and V-68849, this is NA.

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\EMET\SysSettings\

Value Name: ASLR

Value Type: REG_DWORD
Value: 3

Fix Text (F-69329r2_fix)
This is applicable to unclassified systems, for other systems this is NA. Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> EMET >> "System ASLR" to "Enabled" with "Application Opt In" selected. Note: The Enhanced Mitigation Experience Toolkit must be installed on the system and the administrative template files added to make this setting available.

Fix Text (F-69329r2_fix)

This is applicable to unclassified systems, for other systems this is NA.

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> EMET >> "System ASLR" to "Enabled" with "Application Opt In" selected.

Note: The Enhanced Mitigation Experience Toolkit must be installed on the system and the administrative template files added to make this setting available.