Title

Connections to non-domain networks when connected to a domain authenticated network must be blocked. (Cat II impact)

Discussion

Multiple network connections can provide additional attack vectors to a system and should be limited. When connected to a domain, communication must go through the domain connection.

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 Subkey: \Software\Policies\Microsoft\Windows\WcmSvc\GroupPolicy\ Value Name: fBlockNonDomain Type: REG_DWORD Value: 1

Fix Text

Configure the policy value for Computer Configuration -> Administrative Templates -> Network -> Windows Connection Manager -> "Prohibit connection to non-domain networks when connected to domain authenticated network" to "Enabled".

Additional Identifiers

Rule ID: SV-48292r2_rule

Vulnerability ID: V-36675

Group Title: WN08-CC-000015

Expert Comments

CCIs tied to check.

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