Title

Network shares that can be accessed anonymously must not be allowed. (Cat I impact)

Discussion

Anonymous access to network shares provides the potential for gaining unauthorized system access by network users. This could lead to the exposure or corruption of sensitive data.

Check Content

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "Network access: Shares that can be accessed anonymously" includes any entries, this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: NullSessionShares Value Type: REG_MULTI_SZ Value: (Blank)

Fix Text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Network access: Shares that can be accessed anonymously" to be defined but containing no entries (blank).

Additional Identifiers

Rule ID: SV-48071r1_rule

Vulnerability ID: V-3340

Group Title: Anonymous Access to Network Shares

Expert Comments

CCIs tied to check.

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