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The Exchange IMAP4 service must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-207284 EX13-MB-000090 SV-207284r615936_rule Medium
Description
The IMAP4 protocol is not approved for use within the DoD. It uses a clear-text-based user name and password and does not support the DoD standard for PKI for email access. User name and password could easily be captured from the network, allowing a malicious user to access other system features. Uninstalling or disabling the service will prevent the use of the IMAP4 protocol.
STIG Date
Microsoft Exchange 2013 Mailbox Server Security Technical Implementation Guide 2021-12-16

Details

Check Text ( C-7542r393365_chk )
Open the Windows Power Shell and enter the following command:

Get-ItemProperty 'hklm:\system\currentcontrolset\services\MSExchangeIMAP4be' | Select Start

Note: The hklm:\system\currentcontrolset\services\MSExchangeIMAP4 value must be in quotes.

If the value of Start is not set to 4, this is a finding.
Fix Text (F-7542r393366_fix)
Open the Windows Power Shell and enter the following command:

services.msc

Navigate to and double-click on Microsoft Exchange IMAP4 Backend.

Click on the "General" tab.

In the Startup Type: dropdown, select Disabled.

Click the OK button.