The Exchange Internet Message Access Protocol 4 (IMAP4) service must be disabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-228371 | EX16-MB-000180 | SV-228371r944805_rule | Medium |
| Description |
| IMAP4 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 2016 Mailbox Server Security Technical Implementation Guide | 2023-12-18 |
Details
| Check Text (C-30604r944803_chk) |
| Note: This requirement applies to IMAP4. IMAP Secure is not restricted and does not apply to this requirement. Open the Windows Power Shell 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 single quotes. If the value of "Start" is not set to "4", this is a finding. |
| Fix Text (F-30589r944804_fix) |
| Open the Windows Power Shell and enter the following command: services.msc Navigate to and double-click on "Microsoft Exchange IMAP4". Click on the "General" tab. In the "Startup Type" dropdown, select "Disabled". Click the "OK" button. |