The Enhanced Mitigation Experience Toolkit (EMET) Default Protections for Recommended Software must be enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63397	WN10-EM-000020	SV-77887r3_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-64145r4_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 values do not exist or are not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\EMET\Defaults\ Value Type: REG_SZ (for each Value below) Values noted as "Blank" are empty in the registry. Value Name: \Adobe\\Reader\AcroRd32.exe Value: +EAF+ eaf_modules:AcroRd32.dll;Acrofx32.dll;AcroForm.api Value Name: \Adobe\Acrobat\Acrobat\Acrobat.exe Value: +EAF+ eaf_modules:AcroRd32.dll;Acrofx32.dll;AcroForm.api Value Name: \Java\jre\bin\java.exe Value: -HeapSpray Value Name: \Java\jre\bin\javaw.exe Value: -HeapSpray Value Name: \Java\jre\bin\javaws.exe Value: -HeapSpray Value Name: \OFFICE1\EXCEL.EXE Value: +ASR asr_modules:flash.ocx Value Name: \OFFICE1\INFOPATH.EXE Value: "Blank" Value Name: \OFFICE1\LYNC.EXE Value: "Blank" Value Name: \OFFICE1\MSACCESS.EXE Value: "Blank" Value Name: \OFFICE1\MSPUB.EXE Value: "Blank" Value Name: \OFFICE1\OIS.EXE Value: "Blank" Value Name: \OFFICE1\OUTLOOK.EXE Value: "Blank" Value Name: \OFFICE1\POWERPNT.EXE Value: +ASR asr_modules:flash.ocx Value Name: \OFFICE1\PPTVIEW.EXE Value: "Blank" Value Name: \OFFICE1\VISIO.EXE Value: "Blank" Value Name: \OFFICE1\VPREVIEW.EXE Value: "Blank" Value Name: \OFFICE1\WINWORD.EXE Value: +ASR asr_modules:flash.ocx Value Name: \Windows NT\Accessories\wordpad.exe Value: "Blank" Due to a change in the registry structure for EMET 5.5, if the system has a previous version of EMET installed and configured, this setting needs to be set to "Not Configured" prior to the upgrade to EMET 5.5, and the new administrative template files copied to the appropriate area. The setting can then be re-enabled.

Check Text ( C-64145r4_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 values do not exist or are not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\EMET\Defaults\
Value Type: REG_SZ (for each Value below)

Values noted as "Blank" are empty in the registry.

Value Name: *\Adobe\*\Reader\AcroRd32.exe
Value: +EAF+ eaf_modules:AcroRd32.dll;Acrofx32.dll;AcroForm.api

Value Name: *\Adobe\Acrobat*\Acrobat\Acrobat.exe
Value: +EAF+ eaf_modules:AcroRd32.dll;Acrofx32.dll;AcroForm.api

Value Name: *\Java\jre*\bin\java.exe
Value: -HeapSpray

Value Name: *\Java\jre*\bin\javaw.exe
Value: -HeapSpray

Value Name: *\Java\jre*\bin\javaws.exe
Value: -HeapSpray

Value Name: *\OFFICE1*\EXCEL.EXE
Value: +ASR asr_modules:flash*.ocx

Value Name: *\OFFICE1*\INFOPATH.EXE
Value: "Blank"

Value Name: *\OFFICE1*\LYNC.EXE
Value: "Blank"

Value Name: *\OFFICE1*\MSACCESS.EXE
Value: "Blank"

Value Name: *\OFFICE1*\MSPUB.EXE
Value: "Blank"

Value Name: *\OFFICE1*\OIS.EXE
Value: "Blank"

Value Name: *\OFFICE1*\OUTLOOK.EXE
Value: "Blank"

Value Name: *\OFFICE1*\POWERPNT.EXE
Value: +ASR asr_modules:flash*.ocx

Value Name: *\OFFICE1*\PPTVIEW.EXE
Value: "Blank"

Value Name: *\OFFICE1*\VISIO.EXE
Value: "Blank"

Value Name: *\OFFICE1*\VPREVIEW.EXE
Value: "Blank"

Value Name: *\OFFICE1*\WINWORD.EXE
Value: +ASR asr_modules:flash*.ocx

Value Name: *\Windows NT\Accessories\wordpad.exe
Value: "Blank"

Due to a change in the registry structure for EMET 5.5, if the system has a previous version of EMET installed and configured, this setting needs to be set to "Not Configured" prior to the upgrade to EMET 5.5, and the new administrative template files copied to the appropriate area. The setting can then be re-enabled.

Fix Text (F-69325r2_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 >> "Default Protections for Recommended Software" to "Enabled". Note: The Enhanced Mitigation Experience Toolkit must be installed on the system and the administrative template files added to make this setting available. Due to a change in the registry structure for EMET 5.5, if the system has a previous version of EMET installed and configured, this setting needs to be set to "Not Configured" prior to the upgrade to EMET 5.5, and the new administrative template files copied to the appropriate area. The setting can then be re-enabled.

Fix Text (F-69325r2_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 >> "Default Protections for Recommended Software" to "Enabled".

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

Due to a change in the registry structure for EMET 5.5, if the system has a previous version of EMET installed and configured, this setting needs to be set to "Not Configured" prior to the upgrade to EMET 5.5, and the new administrative template files copied to the appropriate area. The setting can then be re-enabled.