Title

Anonymous enumeration of SAM accounts will not be allowed. (Cat I impact)

Discussion

This is a Category 1 finding as it allows anonymous logon users (null session connections) to list all account names, thus providing a list of potential points to attack the system.

Check Content

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” is not set to “Enabled”, then 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: RestrictAnonymousSAM Value Type: REG_DWORD Value: 1

Fix Text

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” to “Enabled".

Additional Identifiers

Rule ID:

Vulnerability ID: V-26283

Group Title:

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.