The Enhanced Mitigation Experience Toolkit (EMET) system-wide Structured Exception Handler Overwrite Protection (SEHOP) must be configured to Application Opt Out.

From Windows Vista Security Technical Implementation Guide

Part of WINCC-000083

Associated with IA controls: ECVP-1

SV-50060r2_rule The Enhanced Mitigation Experience Toolkit (EMET) system-wide Structured Exception Handler Overwrite Protection (SEHOP) must be configured to Application Opt Out.

Vulnerability discussion

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.

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EMET 4.0 Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> EMET -> "System SEHOP" to "Enabled" with "Application Opt Out" selected. (EMET 3.0 policy name - "SEHOP".) The Enhanced Mitigation Experience Toolkit must be installed on the system and the administrative template files added to make this setting available. Document applications that do not function properly due to this setting, and are opted out, with the IAO. Opted out exceptions can be configured with the following command. EMET_Conf --Set "application path\executable name" -SEHOP

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