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Exchange local machine policy must require signed scripts.


Overview

Finding ID Version Rule ID IA Controls Severity
V-259664 EX19-MB-000061 SV-259664r942306_rule Medium
Description
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.
STIG Date
Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide 2024-01-10

Details

Check Text ( C-63403r942304_chk )
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 (F-63311r942305_fix)
Open the Exchange Management Shell and enter the following command:

Set-ExecutionPolicy RemoteSigned