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Check: 5.123-MS

Windows 2008 Member Server STIG: 5.123-MS (in versions v6 r46 through v6 r35)

Title

Unauthenticated RPC clients must be restricted from connecting to the RPC server. (Cat II impact)

Discussion

Configuring RPC to restrict unauthenticated RPC clients from connecting to the RPC server will prevent anonymous connections.

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 Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Rpc\ Value Name: RestrictRemoteClients Type: REG_DWORD Value: 1

Fix Text

Configure the policy value for Computer Configuration -> Administrative Templates -> System -> Remote Procedure Call -> "Restrictions for Unauthenticated RPC clients" to "Enabled" and "Authenticated".

Additional Identifiers

Rule ID: SV-29409r2_rule

Vulnerability ID: V-14253

Group Title: RPC - Unauthenticated RPC Clients

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CCIs

CCIs tied to check.

Number	Definition
CCI-001967	Authenticate organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based.

Controls

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

Number	Title
IA-3(1)	Cryptographic Bidirectional Authentication