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

If the following registry value does not exist, this is not a finding: If the following registry value does exist and is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: NullSessionShares Value Type: REG_MULTI_SZ Value: (Blank)

Fix Text

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

Additional Identifiers

Rule ID:

Vulnerability ID: V-3340

Group Title:

Expert Comments

CCIs tied to check.

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