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V-259589

CAT II (Medium)

Exchange local machine policy must require signed scripts.

Rule ID

SV-259589r1015762_rule

STIG

Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide

Version

V2R2

CCIs

CCI-003992 CCI-001749

Discussion

Scripts often provide a way for attackers to infiltrate a system, especially scripts downloaded from untrusted locations. By setting machine policy to prevent unauthorized script executions, unanticipated system impacts can be avoided. Failure to allow only signed remote scripts reduces the attack vector vulnerabilities from unsigned remote scripts.

Check Content

Open the Exchange Management Shell and enter the following command:

Get-ExecutionPolicy

If the value returned is not "RemoteSigned", this is a finding.

Fix Text

Open the Exchange Management Shell and enter the following command:

Set-ExecutionPolicy RemoteSigned