The system will be configured to use Safe DLL Search Mode.

From Windows Server 2008 R2 Member Server Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-32348r1_rule The system will be configured to use Safe DLL Search Mode.

Vulnerability discussion

The default search behavior, when an application calls a function in a Dynamic Link Library (DLL), is to search the current directory followed by the directories contained in the systems path environment variable. An unauthorized DLL inserted into an applications working directory could allow malicious code to be run on the system. Creating the following registry key and setting the appropriate value forces the system to search the %Systemroot% for the DLL before searching the current directory or the rest of the path.

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Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “MSS: (SafeDllSearchMode) Enable Safe DLL search mode (recommended)” to “Enabled”.

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