Exchange IMAP4 service must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-69753	EX13-CA-000095	SV-84375r1_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 malicious users to access other system features. Uninstalling or disabling the service will prevent the use of the IMAP4 protocol.

STIG	Date
MS Exchange 2013 Client Access Server Security Technical Implementation Guide	2019-12-18

Details

Check Text ( C-70197r1_chk )
Open the Windows PowerShell and enter the following command: Get-ItemProperty 'hklm:\system\currentcontrolset\services\MSExchangeIMAP4' | 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-75959r1_fix)
Open the Windows PowerShell 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.