Anonymous enumeration of shares must be restricted.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-1093	3.018	SV-25090r2_rule	ECSC-1 PRNK-1	High

Description
Allowing anonymous logon users (null session connections) to list all account names and enumerate all shared resources can provide a map of potential points to attack the system.

STIG	Date
Windows 7 Security Technical Implementation Guide	2015-09-02

Details

Check Text ( C-62053r2_chk )
Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies >> Security Options. If the value for "Network access: Do not allow anonymous enumeration of SAM accounts and shares" is not set to "Enabled", this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: RestrictAnonymous Value Type: REG_DWORD Value: 1

Check Text ( C-62053r2_chk )

Analyze the system using the Security Configuration and Analysis snap-in.
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies >> Security Options.

If the value for "Network access: Do not allow anonymous enumeration of SAM accounts and shares" is not set to "Enabled", this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\

Value Name: RestrictAnonymous

Value Type: REG_DWORD
Value: 1

Fix Text (F-66951r1_fix)
Configure the policy values for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Do not allow anonymous enumeration of SAM accounts and shares" to "Enabled".