Check: WN11-SO-000120
Microsoft Windows 11 STIG:
WN11-SO-000120
(in versions v2 r2 through v1 r1)
Title
The Windows SMB server must be configured to always perform SMB packet signing. (Cat II impact)
Discussion
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.
Check Content
If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: RequireSecuritySignature Value Type: REG_DWORD Value: 1
Fix Text
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network server: Digitally sign communications (always)" to "Enabled".
Additional Identifiers
Rule ID: SV-253451r958908_rule
Vulnerability ID: V-253451
Group Title: SRG-OS-000423-GPOS-00187
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-002388 |
Defines the monitoring tools to be employed to detect indicators of denial-of-service attacks against the system. |
| CCI-002418 |
Protect the confidentiality and/or integrity of transmitted information. |