Check: WN10-SO-000120
Microsoft Windows 10 STIG:
WN10-SO-000120
(in versions v3 r2 through v1 r7)
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-220927r958908_rule
Vulnerability ID: V-220927
Group Title: SRG-OS-000423-GPOS-00187
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-002418 |
Protect the confidentiality and/or integrity of transmitted information. |
| CCI-002421 |
Implement cryptographic mechanisms to prevent unauthorized disclosure of information and/or detect changes to information during transmission. |