The Windows SMB server must be configured to always perform SMB packet signing.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-6833	WN12-SO-000032	SV-52936r1_rule	ECSC-1	Medium

Description
The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB server will only communicate with an SMB client that performs SMB packet signing.

STIG	Date
Windows Server 2012 / 2012 R2 Domain Controller Security Technical Implementation Guide	2014-07-09

Details

Check Text ( None )
None

Fix Text (F-45862r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Microsoft network server: Digitally sign communications (always)" to "Enabled".