Exchange IMAP4 service must be disabled.

From MS Exchange 2013 Client Access Server Security Technical Implementation Guide

Associated with: CCI-000381

SV-84375r1_rule Exchange IMAP4 service must be disabled.

Vulnerability discussion

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.

Check content

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

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.

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